EPA-600/3-77-100
September 1977
Ecological Research Series
             DISTRIBUTION OF PHYTOPLANKTON  IN
                                          VIRGINIA LAKES
                                 Environmental Monitoring and Support Laboratory
                                         Office of Research and Development
                                        U.S. Environmental Protection Agency
                                               Las Vegas, Nevada 89114

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                RESEARCH REPORTING SERIES

Research reports of the Office of Research and Development, U.S. Environmental
Protection Agency, have been grouped into nine series. These nine broad cate-
gories were established to facilitate further development and application of en-
vironmental technology. Elimination  of  traditional grouping was consciously
planned to foster technology transfer and a maximum interface in related fields.
The nine series are:

      1.   Environmental Health Effects Research
      2.   Environmental Protection Technology
      3.   Ecological Research
      4.   Environmental Monitoring
      5.   Socioeconomic Environmental Studies
      6.   Scientific  and Technical Assessment Reports (STAR)
      7.   Interagency Energy-Environment Research and Development
      8.   "Special"  Reports
      9.   Miscellaneous Reports

This report has been assigned to the ECOLOGICAL RESEARCH series. This series
describes research on the effects of pollution on  humans, plant and animal spe-
cies, and materials.  Problems are assessed for their long- and short-term influ-
ences. Investigations include formation, transport, and pathway studies to deter-
mine the fate of pollutants and their effects. This work provides the technical basis
for setting standards to minimize undesirable changes in living organisms in the
aquatic, terrestrial, and atmospheric environments.
This document is available to the public through the National Technical Informa-
tion Service, Springfield, Virginia 22161.

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                                                    EPA-600/3-77-100
                                                    September  1977
    DISTRIBUTION OF PHYTOPLANKTON IN VIRGINIA LAKES
                            by

J. W. Hilgert*. V. W. Lambou, F. A.  Morris*, R. W. Thomas,
         M. K. Morris*, L. R. Williams, W. D. Taylor,
               F. A. Hiatt*, and S.  C. Hern
            Monitoring Operations Division
    Environmental Monitoring and Support Laboratory
               Las Vegas, Nevada   89114
          *Departtnent of Biological Sciences
          The University of Nevada, Las Vegas
               Las Vegas, Nevada   89154
      ENVIRONMENTAL MONITORING AND SUPPORT LABORATORY
            OFFICE OF RESEARCH AND DEVELOPMENT
           U.S. ENVIRONMENTAL PROTECTION.AGENCY
                 LAS VEGAS, NEVADA    89114

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                              DISCLAIMER
     This report has been reviewed by the Environmental Monitoring and
Support Laboratory-Las Vegas, U.S. Environmental Protection Agency,
and approved for publication.  Mention of trade names or commercial
products does not constitute endorsement or recommendation for use.
                                   ii

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                              FOREWORD
     Protection of the environment requires effective regulatory
actions which are based on sound technical and scientific information.
This information must include the quantitative description and linking
of pollutant sources, transport mechanisms, interactions, and re-
sulting effects on man and his environment.  Because of the complexities
involved, assessment of specific pollutants in the environment requires
a total systems approach which transcends the media of air, water, and
land.  The Environmental Monitoring and Support Laboratory-Las Vegas
contributes to the formation and enhancement of a sound integrated moni-
toring data base through multidisciplinary, multimedia programs designed
to:

         • develop and optimize systems and strategies for moni-
           toring pollutants and their impact on the environment

         • demonstrate new monitoring systems and technologies
           by applying them to fulfill special monitoring needs
           of the Agency's operating programs

     This report presents the species and abundance of phytoplankton
in the 8 lakes sampled by the National Eutrophication Survey in the
State of Virginia, along with results from the calculation of several
commonly used biological indices of water quality and community structure.
These data can be used to biologically characterize the study lakes,
and as baseline data for future investigations.  TKis report was written
for use by Federal,  State, and local  governmental  agencies concerned with
water quality analysis, monitoring, and/or regulation.   Private industry
and individuals similarly involved with the biological  aspects of water
quality will find the document useful.  For further information contact
the Water and Land Quality Branch, Monitoring Operations Division.
                                    George BY Morgan /
                                       Director
                  Environmental  Monitoring and Support Laboratory
                                      Las  Vegas
                                   iii

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                               CONTENTS

Foreword 	i i i
Introduction 	  1
Materials and Methods 	  2
     Lake and Site Selection 	  2
     Sample Preparation 	  2
     Examination 	  3
     Qua!ity Control 	  4
Results 	  5
     Nygaard's Trophic State Indices 	  5
     Palmer's Organic Pollution Indices 	  5
     Species Diversity and Abundance Indices 	  7
     Species Occurrence and Abundance 	  9
Literature Cited 	 10
Appendix.  Summary of Phytoplankton Data 	 11

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                             INTRODUCTION
     The collection and analysis of phytoplankton data were included
in the National  Eutrophication Survey in an effort to determine
relationships between algal  characteristics and trophic status of
individual lakes.
     During spring, summer,  and fall  of 1973, the Survey sampled 250
lakes in 17 States.  Over 700 algal  species and varieties were
identified and enumerated from the 743 water samples examined.
     This report presents the species and abundance of phytoplankton
in the 8 lakes sampled in the State of Virginia (Table 1).  The
Nygaard's Trophic State (Nygaard 1949), Palmer's Organic Pollution
(Palmer 1969), and species diversity and abundance indices are also
included.
                TABLE 1.  LAKES SAMPLED IN THE STATE OF VIRGINIA
STOREt No.
Lake Name
County
5103
5105
5106

5108
5110
5111
5112
5113
Claytor Lake
John W. Flannagan Dam
John H. Kerr Reservoir
(Buggs Island Lake)
Occoquan Reservoir
Smith Mountain Lake
Lake Chesdin
Chickahominy Lake
Rivanna (South Fork)
Reservoir
Pulaski
Dickenson
Mecklenburg, Halifax
(Granville, Vance,
Warren in NC)
Fauquier
Bedford, Franklin
Dinwiddie
New Kent, Charles City
Albemarle

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                        MATERIALS AND METHODS
LAKE AND SITE SELECTION

     Lakes and reservoirs included in the Survey were selected through
discussions with State water pollution agency personnel  and U.S.
Environmental Protection Agency Regional Offices (U.S. Environmental
Protection Agency 1975).  Screening and selection strongly emphasized
lakes with actual or potential accelerated eutrophication problems.
As a result, the selection was limited to lakes:

     (1) impacted by one or more municipal sewage treatment plant
         outfalls either directly into the lake or by discharge to an
         inlet tributary within approximately 40 kilometers of the
         lake;

     (2) 40 hectares or larger in size; and

     (3) with a mean hydraulic retention time of at least 30 days.

Specific selection criteria were waived for some lakes of particular
State interest.

     Sampling sites for a lake were selected based on available
information on lake morphometry, potential major sources of nutrient
input, and on-site judgment of the field limnologist (U.S.
Environmental Protection Agency 1975).  Primary sampling sites were
chosen to reflect the deepest portion of each major basin 1n a test
lake.  Where many basins were present, selection was guided by
nutrient source information on hand.  At each sampling site, a depth-
integrated phytoplankton sample was taken.  Depth-integrated samples
were uniform mixtures of water from the surface to a depth of 15 feet
(4.6 meters) or from the surface to the lower limit of the photic zone
representing 1 percent of the incident light, whichever was greater.
If the depth at the sampling site was less than 15 feet (4.6 meters),
the sample was taken from just off the bottom to the surface.
Normally, a lake was sampled three times in 1 year* providing
information on spring, summer, and fall conditions.
SAMPLE PREPARATION

     Four milliliters (ml) of Acid-Lugol's sollution (Prescott 1970)
were added to each 130-ml sample from each site at the time of
collection for preservation.  The samples were shipped to the
Environmental Monitoring and Support Laboratory, Las Vegas, Nevada,
where equal volumes from each site were mixed to form two 130-ml
composite samples for a given lake.  One composite sample was put into
storage and the other was used for the examination.

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     Prior to examination, the composite samples were concentrated by
the settling method.  Solids were allowed to settle for at least 24
hours prior to siphoning off the supernate.  The volume of the.
removed supernate and the volume of the remaining concentrate were
measured and concentrations determined.  A small (8 ml) library
subsample of the concentrate was then taken.  The remaining
concentrate was gently agitated to resuspend the plankton and poured
into a capped, graduated test tube.  If a preliminary examination of a
sample indicated the need for a more concentrated sample, the contents
of the test tube were further concentrated by repeating the settling
method.  Final concentrations varied from 15 to 40 times the original.

     Permanent slides were prepared from concentrated samples after
analysis was complete.  A drop of superconcentra^e from the bottom of
the test tube was placed in a ring of clear Karo Corn Syrup with
phenol (a few crystals of phenol were added to each 100 ml of syrup)
on a glass slide, thoroughly mixed, and topped with a coverglass.
After the syrup at the edges of the coverglass had hardened, the
excess was scraped away and the mount was sealed with clear fingernail
polish.  Permanent diatom slides were prepared by drying sample
material on a coverglass, heating in a muffle furnace at 400  C for 45
minutes, and mounting in Hyrax.   Finally, the mounts were sealed with
clear fingernail polish.

     Backup samples, library samples, permanent sample slides, and
Hyrax-mounted diatom slides are being stored and maintained at the
U.S.  Environmental Protection Agency's Environmental Monitoring and
Support Laboratory-Las Vegas.
EXAMINATION

     The phytoplankton samples were examined with the aid of binocular
compound microscopes.  A preliminary examination was performed to
precisely identify and list all forms encountered.  The length of this
examination varied depending on the complexity of the sample.  An
attempt was made to find and identify all of the forms present in each
sample.  Often forms were observed which could not be Identified to
species or to genus.  Abbreviated descriptions were used to keep a
record of these forms (e.g., lunate cell, blue-green filament,
Navicula #1).  Diatom slides were examined using a standard light
microscope.  If greater resolution was essential to accurately
identify the diatoms, a phase-contrast microscope was used.

     After the species list was compiled, phytoplankton were enumerated
using a Neubauer Counting Chamber with a 40X objective lens and a 10X
ocular lens.  All forms within each field were counted.  The count was
continued until a minimum of 100 fields had been viewed, or until the
dominant form had been observed a minimum of 100 times.
©Registered Trademark

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QUALITY CONTROL

     Internal quality control checks on species identifications and
counts were performed on a regular basis between project phycologists
at the rate of 7 percent.  Although an individual had primary
responsibility for analyzing a sample, taxonomic problems were
discussed among the phycologists.

     Additional quality control checks were performed on the Survey
samples by Dr. G. W. Prescott of the University of Montana at the rate
of 5 percent.  Quality control checks were made on 75 percent of these
samples to verify species identifications while checks were made on
the remaining 25 percent of the samples to verify genus counts.
Presently, the agreement between quality control checks for species
identification and genus enumerations is satisfactory.

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                               RESULTS
     The Appendix summarizes all of the phytoplankton data collected
from the State by the Survey.  It is organized by lake, including an
alphabetical phytoplankton species list with concentrations, for
individual species given by sampling date.   Results from the
application of several indices are presented (Nygaard's Trophic State,
Palmer's Organic Pollution, and species diversity and abundance).
Each lake has been assigned a four digit STORET number.  [STORET
(STOrage and RETrieval) is the U.S. Environmental Protection Agency's
computer system which processes and maintains water quality data.]  The
first two digits of the STORET number identify the State; the last two
digits identify the lake.


NYGAARD'S TROPHIC STATE INDICES

     Five indices devised by Nygaard (1949) were proposed under the
assumption that certain algal groups are indicative of levels of
nutrient enrichment.  These indices were calculated in order to aid in
determining the surveyed lakes' trophic status.  As a general rule,
Cyanophyta, Euglenophyta, centric diatoms,  and members of the
Chlorococcales are found in waters that are eutrophic (rich in
nutrients), while desmids and many pennate  diatoms generally cannot
tolerate high nutrient levels and so are found in oligotrophic waters
(poor in nutrients).

     In applying the indices to the Survey  data, the number of taxa in
each major group was determined from the species list for each sample.
The ratios of these groups give numerical values which can be used as
a biological index of water richness.  The  five indices and the ranges
of values established for Danish lakes by Nygaard for each trophic
state are presented in Table 2.  The appropriate symbol, (E) eutrophic
and (0) oligotrophic, follows each calculated value in the tables in
the Appendix.  A question mark (?) was entered in these tables when
the calculated value was within the range of both classifications.


PALMER'S ORGANIC POLLUTION INDICES

     Palmer (1969) analyzed reports from 165 authors and developed
algal pollution indices for use in rating water samples with high
organic pollution.  Two lists of organic pollution-tolerant forms were
prepared, one containing 20 genera, the other, 20 species (Tables 3
and 4).  Each form was assigned a pollution index number ranging from
1 for moderately tolerant forms to 6 for extremely tolerant forms.
Palmer based the index numbers on occurrence records and/or where
emphasized by the authors as being especially tolerant of organic
pollution.

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TABLE 2.  NYGAARD'S TROPHIC STATE  INDICES  ADAPTED FROM HUTCHINSON (1967)
Index
Myxophycean
Calculation
Myxophyceae
Desmideae
Oligotrdphic
0.0-0.4
Eutrdphic
0.1-3.0
Chlorophycean

Diatom


Euglenophyte


Compound
     Chlorococcales

     Centric Diatoms
     Pennate Diatoms

      Eugl enophyta
Myxophyceae + Chlorococcales

Myxophyceae + Chlorococcales +
Centric Diatoms + Euglenophyta
          Desmideae
0.0-0.7

0.0-0.3


0.0-0.2


0.0-1.0
0.2-9.0

0.0-1.75


0.0-1.0


1.2-25
TABLE 3.  ALGAL GENUS  POLLUTION  INDEX
          (Palmer 1969)
                         TABLE 4.  ALGAL SPECIES POLLUTION
                                   INDEX (Palmer 1969)
Genus
Anaaystis
Arikistrodesmus
Chlamydomonas
Chlorella
Closteriim
Cyolotella
Euglena
Comphonema
Lepooinolis
Melosira
Mioraotinium
Nawicula
Nitzsohia
Oscillatoria
Pandorina
Phaaus
Phormidium
Scenedesmus
Stigeoo Ionium
Synedra
Pollution
Index
1
2
4
3
1
1
5
1
1
1
1
3
3
5
1
2
1
4
2
2
                                         Species
                                                  Pollution
                                                    Index
                                        jaleatus
                         Artheospira jenneri
                         Chlovella vulgarie
                         Cyolotella meneghiniana
                         Euglena graeilia
                         Euglena vividis
                         Gomphonema parvulum
                         Melosira varians
                         Navioula aryptooephala
                         Nitzschia aeioulccris
                         Nitzschia palea
                         Osailla-bovia  ohlovina
                         Oacillakoria  lime^a
                         Oaoillatovia  pri-naepe
                         Oscillatoria  putvida
                         Oscillator-La  tenu-ie
                         Pandowina morion
                         Seenedesmus quadrioauda
                         Stigeoolonvum tenue
                         Synedra ulna
                                                                       2
                                                                       2
                                                                       2
                                                                       \
                                                                       6
                                                                       i
                                                                       2
                                                                       \
                                                                       \
                                                                       5
                                                                       2
                                                                       4
                                                                       1
                                                                       \
                                                                       4
                                                                       3
                                                                       4
                                                                       3
                                                                       3

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     In analyzing a water sample, any of the 20 genera or species of
algae present in concentrations of 50 per milliliter or more are
recorded.  The pollution index numbers of the algae present are
totaled, providing a genus score and a species score.  Palmer
determined that a score of 20 or more for either index can be taken as
evidence of high organic pollution, while a score of 15 to 19 is taken
as probable evidence of high organic pollution.  Lower figures suggest
that the organic pollution of the sample is not high, that the sample
is not representative, or that some substance or factor interfering
with algal persistence is present and active.


SPECIES DIVERSITY AND ABUNDANCE INDICES

     "Information content" of biological samples is being used
commonly by biologists as a measure of diversity.   Diversity in this
connection means the degree of uncertainty attached to the specific
identity of any randomly selected individual.  The greater the number
of taxa and the more equal their proportions, the greater the
uncertainty, and hence, the diversity (Pielou 1966).   There are
several methods of measuring diversity, e.g., the formulas given by
Brillouin (1962) and Shannon and Weaver (1963).  The method which is
appropriate depends on the type of biological sample on hand.

     Pielou (1966) classifies the types of biological samples and
gives the measure of diversity appropriate for each type.  The Survey
phytoplankton samples are what she classifies as larger samples
(collections in Pielou's terminology) from which random subsamples can
be drawn.  According to Pielou, the average diversity per individual
for these types of samples can be estimated from the Shannon-Wiener
formula (Shannon and Weaver 1963):


                        S
                 H  =  -Z  P, logY P.
                       1=1  1    x  1

Where P is the proportion of the ith taxon in the sample, which is cal-
culated from n./N; n. is the number of individuals per milliliter of the
ith taxon; N is the total number of individuals per ml; and S is the total
number of taxa.

     However, Basharin (1959) and Pielou (1966) have pointed out that
H calculated from the subsample is a biased estimator of the sample H,
and if this bias is to be accounted for, we must know the total  num-
ber of taxa present in the sample since the magnitude of this bias
depends on it.

     Pielou (1966) suggests that if the number of taxa in the
subsample falls only slightly short of the number in the larger
sample, no appreciable error will result in considering S, estimated

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from the subsample, as being equal to the sample value.  Even though
considerable effort was made to find and identify all taxa, the Survey
samples undoubtedly contain a fair number of rare phytop'lankton taxa
which were not encountered.

    In the Shannon-Wiener formula, an increase in the number of taxa
and/or an increase in the evenness of the distribution of individuals
among taxa will increase the average diversity per individual from its
minimal value of zero.  Sager and Hasler (1969) found that the
richness of taxa was of minor importance in determination of average
diversity per individual for phytoplankton and they concluded that
phytoplankton taxa in excess of the 10 to 15 most abundant ones have
little effect on H, which was verified by our own calculations.  Our
counts are in number per milliliter and since logarithms to the base
2 were used in our calculations, H is expressed in units of bits per
individual.  When individuals of a taxon were so rare that they were
not counted, a value of 1/130 per milliliter or 0.008 per milliliter
was used in the calculations since at least one individual of the
taxon must have been present in the collection.

    A Survey sample for a given lake represents a composite of all
phytoplankton collected at different sampling sites on a lake during a
given sampling period.  Since the number of samples (M) making up a
composite is a function of both the complexity of the lake sampled and
its size, it should affect the richness-of-taxa component of the
diversity of our phytoplankton collections.  The maximum diversity
(MaxH) (i.e., when the individuals are distributed among the taxa as
evenly as possible) was estimated from Iog2 S, the total diversity (D)
was calculated from HN, and the evenness component of diversity (J)
was estimated from H/MaxH (Pielou 1966).  Also given in the Appendix
are L (the mean number of individuals per taxa per milliliter) and K
(the number of individuals per milliliter of the most abundant taxon
in the sample).

    Zand (1976) suggests that diversity indices be expressed in units
of "sits", i.e., in logarithms to base S (where S is the total number
of taxa in the sample) instead of in "bits", i.e., in logarithms to
base 2.  Zand points out that the diversity index in sits per
individual is a normalized number ranging from 1 for the most evenly
distributed samples to 0 for the least evenly distributed samples.
Also, it can be used to compare different samples, independent of the
number of taxa in each.  The diversity in bits per individual should
not be used in direct comparisons involving various samples which
have different numbers of species.  Since MaxH equals log S, the ex-
pression in sits is equal to log<- S, or 1.  Therefore diversity in sits
per individual is numerically equivalent to J, the evenness component
for the Shannon-Wiener formula.
                                   8

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SPECIES OCCURRENCE AND ABUNDANCE

    The alphabetic phytoplankton species  list for each  lake,
presented in the Appendix, gives the concentrations  of  individual
species by sampling date.   Concentrations are in  cells,  colonies,  or
filaments (CEL, COL, FIL)  per milliliter.  An "X" after a  species  name
indicates the presence of the species on  that date in such a  low
concentration that it did not show up in  the count.  A  blank  space
indicates that the organism was not found in the  sample collected  on
that date.  Column S is used to designate the examiner's subjective
opinion of the five dominant taxa in a sample, based upon  relative
size and concentration of the organism.   The percent column (%C)
presents, by abundance, the percentage composition of each taxon.

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                           LITERATURE CITED
Basharin, G. P.  1959.  On a statistical estimate for the entrophy of a
     sequence of independent random variables, pp. 333-336.   In N.
     Artin (ed.), Theory of Probability and Its Appli~a:ions
     (translation of "Teoriya Veroyatnosei i ee Pr&nk..ieniya") 4.
     Society for Industrial and Applied Mathematics, Philadelphia.

Brillouin, L.  1962.  Science and Information Theory (2nd ed.).
     Academic Press, New York.  351 pp.

Hutchinson, G. E.  1967.  A Treatise on Limnology.  II.  Introduction
     to Lake Biology and the Limnoplankton.  John Wiley and Sons,
     Inc., New York.  1,115 pp.

Nygaard, G.  1949.  Hydrobiological studies of some Danish ponds and
     lakes.  II.  (K danske Vidensk.  Selsk.)  Biol.  Sci. 7:293.

Palmer, C. M.  1969.  A composite rating of algae tolerating organic
     pollution.  J. Phycol.  5:78-82.

Pielou, E. C.  1966.  The measurement of diversity in different types
     of biological collections.  J. Theor. Biol.  13:131-144.

Prescott, G. W.  1970.  How to Know the Freshwater Algae.  William C.
     Brown Company, Dubuque.  348 pp.

Sager, P. E. and A. D. Hasler.  1969.  Species diversity in laucustrine
     phytoplankton.  I.  The components of the index of diversity from
     Shannon's formula.  Amer. Natur.  103(929):51-59.

Shannon, C. E. and W. Weaver.  1963.  The Mathematical Theory of
     Communication.  University of Illinois Press, Urbana.  117 pp.

U.S. Environmental Protection Agency.  1975.  National Eutrophication
     Survey Methods 1973-1976.  Working Paper No. 175.  Environmental
     Monitoring and Support Laboratory. Las Vegas, Nevada, and
     Corvallis Environmental Research Laboratory, Corvallis, Oregon.
     91 pp.

land, S. M.  1976.  Indexes associated with information theory in water
     quality.  Journal WPCF.  48(8):2026-2031.
                                     10

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             APPENDIX.  SUMMARY OF PHYTOPLANKTON DATA
    This appendix was generated by computer.   Because it was only
possible to use upper case letters in the printout, all  scientific
names are printed in upper case and are not italicized.

     The alphabetic phytoplankton lists include taxa without species
names (e.g., EUNOTIA, EUNOTIA #1, EUNOTIA ?,  FLAGELLATE, FLAGELLATES,
MICROSYSTIS INCERTA ?, CHLOROPHYTAN COCCOID CELLED COLONY).   When
species determinations were not possible, symbols or descriptive
phrases were used to separate taxa for enumeration purposes.  Each
name on a list, however, represents a unique  species different from
any other name on the same list, unless otherwise noted, for counting
purposes.

    Numbers were used to separate unidentified species of the same
genus.  A generic name listed alone is also a unique species.   A
question mark (?) is placed immediately after the portion of a name
which was assigned with uncertainty.   Numbered, questioned,  or otherwise
designated taxa were established on a lake-by-lake basis; therefore
NAVICULA #2 from lake A cannot be compared to NAVICULA #2 from lake
B.  Pluralized categories (e.g., FLAGELLATES, CENTRIC DIATOMS, SPP.)
were used for counting purposes when  taxa could not be properly
differentiated on the counting chamber.
                                  11

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LAKE NAPE: CLAYTOF LAKE
STCRET NUMBER: 5103
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   07 16 73  09 27 73
                                 MYXOPHYCEAN
                               CHLOBOPHYCEAN
                                EUGLENOPHYT6
                                      DIATOM
                                    COMPOUND
0.80 E
3.80 E
0.04 7
0.33 E
5.40 E
3.00 P.
4.00 E
0.07 ?
0.15 ?
8.50 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   07 16 73  09 27 73
                                       GENUS
                                     SPECIES
    00
    02
    00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   07 16 73  09 27 73
                      AVERAGE  DIVERSITY
                         NUMBER OF TAXA
           NUMBER OF SAMPLES COMPOSITED
                      MAXIMUM  OIVERSITY MAXH
                        TOTAL  DIVERSITY
         TOTAL NUMBER OF INDIVIDUALS/ML
                      EVENESS  COMPONENT
        MEAN NUMBER OF INOIVIDUALS/TAXA
       NUMBER/ML  OF MOST ABU^D\NT  TAXON
H
S
M
;H
0
N
J
L
K
3.44
43.00
4.00
5.43
6216.08
1807.00
0.63
42.02
490.00
3.06
37.00
4.00
5.21
5829.30
1905.00
0.59
51.49
545.00

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LAKE NfME: CLAYTOR LAKE
STORE? NUMBzK: 5103
CONTINUED
                                                  07  16  73
                                                                    09 27  73
TAXA

ACHNANTHES
ACHNANTHSS LANCEOLATA
 V. DUB IA
ACTINASTRUM GRACILIMUM
ACTINASTRUM HANTZSCHII ?
ANABAENA «1
ANABAENA #2
ANKISTRODESMUS
APHANIZOMENON ?
CENTRIC DIATOM
CLOSTERIUM
COCCCNEIS
COCCCNEIS PLACENTULA
 V. EUGLYPTA
COELASTPUM RETICULATUM
COELASTRUM SPHAERICUM
COSMARIUM
CYMBELLA
CYMBELLA AFFINIS 7
DACTYLOCOCCOPSIS
DINOFLAGELLATE
cJDORINA fcLEGANS
EUGLENA
FLAGELLATf #1
FLAGELLATE »2
FLAGELLATES
F^AGILAPIA CFOTONENSIS
F^AGILAFIA CPOTONENSIS 7
GOMPHONEMA
GYPOSIGMA
MALLCMCMAS
MfcLOSIRA GRANULAT*
 V. ANGUSTliSIMA
FORM
C£L
CEL
COL
COL
' FIL
FIL
CtL
FIL
CEL
C£L
CEL
CEL
COL
COL
CEL
CEL
CEL
CEL
CEL
COL
CEL
CEL
CEL
CEL
CEL
C£L
crL
CEL
CEL
CEL
S







5















1
2





1C






5.1
5.1




3.4






'



27.1
16.9




5.1
ALGAL
UNITS
PER ML

X

X


92
92

X

X
61
X
X

X

X

X


490
306




92
S







2













5
1


4




*C







14.3
1.7




0.8



5.0
0.8
o.a
1.7
28.6
13.4


13.4




ALGAL
UNITS
PfcR ML
X

X

X
X

272
32
X
X


16

X
X
96
16
1 16
1 32
545
256


256
X
X
X
X

-------
LAKE MME: CLAYTOS LAKE
STCRET NUM36F: 5103
CONTINUED
                                                  07  16 73
                                                                   09 27  73
TAXA

MELOSIRA VARIANS
MEMS MOPED IA
MICRCCYSTIS
MICPOCYSTIS INCERTA
NAVICULA
NAVICULA *1
NAVICULA #2
NITZSCHIA
OSCILLATORIA LIMNETICA
PEDIASTRUM DUPLEX
 V. RETICULATUM
PEOIASTkUM SIMPLEX
 V. DUODENARIUM
PFDIASTRUM TETRAS
 V. tETRAODON
SCENEOESMUS #1
SCENEOESMUS *2
SCENEDESMUS ABUNDANS
SCENEDESMUS ARHATUS ?
 V. BICAUDATLS
SCENEOESMUS BIJUGA
SCENEDESMUS BIJUGA
 V. ALTFRNANS
SCENEDESMUS CENTICULATUS
SCENEDESMUS OENTICULATUS
 V. LINEARIS
SCENEDESMUS DIMORPHUS
SCENcDfcSMUS INTFRMEDIUS
SCENEDLSMUS INTERMfDIUS
 V. BICAUDATUS
SCENEO£SMUS CPOLIF.NSIS
SC6NFDESKUS FROTUBERANS
FORM
CEL
COL
COL
COL
CEL
CEL
CEL
CEL
FIL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
S

























ZC








3.4





3.4


1.7


1.7


5.1

ALGAL
UNITS
PER ML
X
X

X
X


X
61
X

X
X
X
61
X
X
31

X
31
X
X
92

S

























?C





0.8
0.8

1.7









0.8




0.8

ALGAL
UNITS
PER ML


X


16
16
X
32

X
X





, '
16




16
X

-------
                 LAKE NAME:  CLAYTOP LAKE
                 STPReT NUMBER:  5103
                                   CONTINUED
cn
                                                                   07 16 73
                                                                    09  27  73
TAXA

STAURASTRUM *1
STAURASTRUM #2
STAURASTRUM #3
STAURASTRUM «4
STEPhANODISCUS
SYNEDRA ?
SYNEDRA #2
SYNECRA DELICATI5SIMA
SYNtORA RADIANS
SYNEDRA RADIANS ?
SYNEDRA ULNA
 V. OXYRHYNCHUS F. MEDIOCONTRACTA
TETRAEDRCN MNIMUM
TETRAEDPON MINIMUM
 V. SCROBICOLATUM
TETRAEDPDN REGULARE
 V. INCUS


FORM
CEL
CEL
C6L
C2L
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CcL
CEL
CEL


S







*




3



*C




5.1


5.1
5.1



6.8

ALGAL
UNITS
PER ML
X
X
X

92


92
92

X

122
X


S









3






*C









13.4

0.8


ALGAL
UNITS
PER ML



X

X
X


256

16


                   TOTAL
                                                     1807
1905

-------
LAKE N*KE: JOHN W. FLANNAGA^ DAM
STORET NUMBER: 5105
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   04 05 73  07 18 73  09 27 73
                                 MYXOPHYCEAN
                               CHLOROPHYCcAN
                                EUGLENOPHYTE
                                      DIATOM
                                    COMPOUND
01/0 E
0/0 0
1.00 E
0/04 ?
02/0 E
0/01 0
1.00 E
0/01 ?
0.50 E
2.00 E
0/02 0
1.50 F
0.33 E
1.00 E
4.00 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   04 05 73  07 18 73  09 27 73
                                       GENUS
                                     SPECIES
00
00
00
00
03
00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICE

                                        DATE   04 05 73  07 18 73  09 27 73
                      AVERAGE DIVERSITY
                         NUMBER OF TAXA
           NUMBER OF SAMPLES COMPOSITED
                      MAXIMUM DIVERSITY MAXH
                        TOTAL DIVERSITY
         TOTAL NUMBER OF INDIVIDUALS/ML
                      EVENESS COMPONENT
        MEAN NUMBER OF INDIVIOUALS/TAXA
       NUMBEP/ML OF MOST ABUMDANT TAXON
H
S
M
:H
D
N
J
L
K
1.61
9.00
4.00
3.17
1051.33
653.00
0.51
72.56
348.00
1.80
10.00
3.00
3.32
3718.83
2066.00
0.54
206.60
1287.00
2.17
18.00
4.00
4.17
51-08.18
2354.00
0.52
130.78
1224.00

-------
LAKE NAME: JCHN W. FLANNAGAN CAM
STORET NUMBER: 5105
:CNTINUEO
                                                  04 05 73
                                                                    07  18  73
                                                                                     09  27  73
TAXA

ACHNANTHES MICROCEPHALA 7
ASTERICNELLA FORMOSA
CtNTRIC DIATCM
CLOSTERIUM
COELASTPUM RETICULATUM
CYCLOTF.LLA
DINCBRYON DIVERGENS
DINOFLAGELLATE
DINOFLAGELLATE #1
EUGLENA
FLAGELLATES
MALLOMONAS
MELOSIRA
NITZSCHIA
OOCYSTIS
OSCILLATORIA LIMNETICA
PENNATF OIATCM
PERIDINIUM WISCONSINENSE
SCENEOESMUS CIMORPHUS
STAURASTRUM
STEPhANODISCUS
SYNEDRA
SYNcDRA #1
SYNE.DRA #2
SYNEDRA #3
TETRAHOF.ON MINIMUM
 V. SCR08ICULATUM

  TOTAL
FORM
CEL
CEL
CEL
CEL
COL
CEL
CEL
CEL
CEL
CEL
C£L
CEL
CEL
CEL
CEL
FIL
CEL
C5L
COL
CEL
CEL
CEL
CEL
CEL
CFL
CEL
ALGiL
UNITS
S %C PER ML






2
3


1











4

5







33.4
8.0


53.3





1.4





2.6

1.4







218
52

X
348




X
9





17
X
9

ALGAL
UNITS
S SC PER ML






5



2






1


3




4



0.9


5.3



62.3
1.7





14.9


10.6

1.7





18


109
X


1287
36

X



308


218

36


2.61 54
ALGAL
UNITS
S «C P£K ML





1


5

2






4



3




1.01 23
2.9
1.0
1.0
1.0
52.0


2.9

24.5



2.9

0.5
3.4



6.9




69
23
23
23
1224

X
69
X
577

X

69

11
81
X
X
X
162




653 2066 2:) 54

-------
                    LAKE  NAME:  JCHN  H.  KERR  RES.
                    5TORET  NUMBEP: 5106
                                                                  NYGAARD TROPHIC  STATE INDICES

                                                            DATE    03  23  73  07  13 73   09 26 73
                                                     MYXOPHYCrAN
                                                  CHLOROPHYCEAN
                                                    eUGLENOPHYTE
                                                          DIATOM
                                                        COMPOUND
02/0 E
0/0 0
0.50 E
0.42 E
08/0 E
2.50 E
4.25 E
0.11 ?
0.55 E
9.00 E
3.50 E
5.50 E
0.22 E
0.71 E
13.5 E
                                                                PAMER'S  ORGANIC  POLLUTION  INDICES

                                                           DATE   03  23  73   07 13  73   09 26  73
00
                                                           GENUS
                                                         SPECIES
     01
     00
00
15
00
                                                            SPECIES  DIVERSITY AND ABUNDANCE  INDICES
                                                           DATE
                                         AVfcPAGE DIVERSITY
                                            NUMBER OF TAXA
                              NUMBER OF SAMPLES COMPOSITED
                                         MAXIMUM DIVERSITY MAXH
                                           TOTAL DIVERSITY
                            TOTAL NUMBER OF INDIVIDUALS/ML
                                         EVEMESS COMPONENT
                           MEAN NUMBER OF  INDIVIDUALS/TAXA
                          NUMBcP/ML OF MOST ABUNDANT TAXUN
03 23 73  07 13 73  09 26 73
H
S
M
:H
0
N
J
L
K
2.20
22.00
9.00
4.46
3036.00
1380.00
0.49
62.73
790.00
3.71
56.00
6.00
5.81
14294.63
3853.00
0.64
68.80
931.00
3.49
40.00
6.00
5.32
24503.29
7021.00
0.66
175.53
1523.00

-------
LAKE NAME: JCHN H. KERR RES.
STORE! NUMBER: 5106
CONTINUED
                                                   03 23 73
                                                                    07 13 73
                                                                                     09 26 73
TAXA

ACHNANTHES LANCEOLATA
 V. OUBIA
ACHNANTHES HICROCEPHALA  ?
ANABAENA
ANABAENA 1*1
ANABAENA #2
APHANIZOMENON ?
ASTERIONELLA FORMOSA
CENTRIC DIATCM
CERATIUM HIRUNDINELLA
CLOSTERIOPSIS
COCCCNEIS
COCCCNEIS FLACENTULA
 V. EUGLYPTA
COELASTRUM SPHAERICUM
COSCINODISCIS
COSMARIUM
CYCLOTELLA STELLIGERA
CYMBELLA Ml
CYMBELLA #2
OACTYLOCOCCOPSIS
DIATOMA
OINGBRYON
DINOFLAGELLATE
OINOFLAGELLATES
EUASTRUK
EUGLENA
EUGLENA *1
EUGLfcNA ttt
EJGLFNA #3
F.UNCTIA
FLAGELLATE #1


FORM

CEL
CEL
FIL
FIL
FIL
FIL
CEL
CEL
CEL
CEL
CEL

CEL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
C5L
C = L
CtL
CEL
CEL
CEL


S




















5










2


zc







2.1
2.1











8.3










12.5
ALGAL
UNITS
PER ML

X





29
29


X





X
X
X
115
X




X



X
172


S








5

























XC
1

5.21
1
3.7



5.8

1



1.0
1.01
0.5



3.7











ALGAL
UNITS
PER ML


202

142
X
X

223


X


40
40
20
X


142

X
X
X
X

X






S






3



























*C


2.8



8.0



0.4









3.6



1.2
0.4

0.4




ALGAL
UNITS
PER ML


197
X


564


X
28


X


X



254



85
28

2d
X
X



-------
              LAKE NAME: JCHN H. KERR RES.
              STORET NUMBEP: 5106
                                   CONTINUED
ro
o
                                                                03 23 73
                                                                                 07 13  73
                                                                                                   09  26 73
TAXA

FLAGELLATE #2
FLAGELLATES
FRAGILARIA CROTONENSIS
FRANCEIA
GOMPHONEMA
GYROSIGMA ?
HANTZSCHIA
LAGERhEIMJA hRATISLAVIENSIS
LYNGBYA
LYNGBYA LIMNETICA
HELOSIfA
MELOSIRA DISTANS
MELOSIRA GR/NULATA
 V. ANGU'StiSSIMA
MELOSIRA ITALICA
 V, TENUISSIMA
McLOSIRA VARIANS
MERISPOPEDIA TENUISSIMA
MICROCYSTIS INCERTA
NAVICULA
NAVICULA *1
NAVICULA #2
NITZSCHIA
NITZSCHIA #1
NITZSChIA ACICULARIS
OSCILLATORIA
OSCILLAJORIA GEMINATA
OSCILLATCRIA LIMNETICA
PANDORINA MCPUM
PEDIASTPUM 8IRADIATUM
 V. LONGECCPNUTUM
PEDIASTPUK DUPLEX
 V. RETICULATUM
FORM
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
FIL
FIL
CEL
CEL
CEL
CEL
CEL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
FIL
FIL
FIL
COL
COL
COL
ALGAL
UNITS
S *C PER ML
3| 5.21 72












1



























57.2






2.1




2.1






X








790
X


X


29




29



ALGAL
UNITS
S *C PER ML

1
2112.41 479







1


























24.2

1.0




1.0




2.1
0.5
2.6

1.0



X
X


X


931

40
X


X
40




81
20
101
X
40
X

X
ALGAL
UNITS
S SC PE* ML


1121.7









5


















0.4




4.0

2.4
4.4



0.8



0.4
2.0




3.6

3.4


1523

28

X

X
282

169
310
X

X
5e>


X
28
141




254
X
28


-------
LAKF NAME: JOHN H. KERR RES.
STORET NUMBER: 5106
CONTINUED
                                                  03 23 73
                                                                   07 13 73
                                                                                    09 26 73
TAXA

PEDIASTRUM SIMPLEX
 V. DUODENARIUM
PENMATE DIATCMS
PHACUS ACUMINATUS
RAPHIDIOPS1S
RHIZOSOLENIA LONGISETA
SCENEDESMUS
SCENEDESMUS *1
SCENEDESMUS #2
SCENEDESMUS #3
SCfcNEDESMUS *4
SCENEDESMUS *5
SCPNEOtSMUS #6
SCENEDESMUS A8UNDANS
SCENEDESMUS ACUTUS
SCENEDESMUS DENTICULATUS
SCENEDESMUS CPCLIENSIS
SCENEDESMUS CFOLIENSIS ?
SCENEDESMUS PROTUBERANS 7
SCENEDESMU.S QUADRICAUDA
SCHROEDERIA
STAURASTRUM #1
STAURASTRUM #2
STEPHANODISCUS
SURIRELLA
SYNEDRA #1
SYNEDRA #2
SYNEORA ACUS ?
TABELLAPIA
TPTRAEDPON
TtTRAtDRON MINIMUM
 V. SCROBICULATUM


FORM

COL
CEL
CEL
FIL
CEL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
COL
CSL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL

CEL
ALGAL
UNITS
S %C PER ML























4










3.1




















5.2










43




















72



X




ALGAL
UNITS
S XC PER ML


4






















3






1
1
9.4| 364
1
1
0.51 20
1.0) 40
1 X
0.5| 20
1 X
1 X
1 X
1 X
a. 5| 20
1
1
1
0.51 20
1 X
1 X
1.01 40
0.51 20
1 X
1
1 x
15.81 607
1.6| 61
1
1 X
0.51 20
1
1.0| 40
ALGAL
UNITS
S %C PER ML




2




















*







0.4


21.7








0.4
0.4
0.8
1.2






3.2
.
14.9







28

X
1523


X





26
28
56
85






226

1044





X

-------
             UKE NAME: JCHN H. KERR RES.
             STORcT NUMBER: 5106
CONTINUED
                                                              03  23  73
                                07  13  73
09 26 73
            TAXA
            TRACHELOMONAS #1
            TRAOELOMON4S #2
              TOTAL
FORM
 CEL
1
1
IS
1 1
1 1
ALGAL
UNITS
*C PER
1
1
ML


1
1
IS
1 1 0
1 1 0
ALGAL 1
UNITS
*C
.51
.51
PER


ML
20
20
1
IS
1 1
1 1
ALGAL
UNITS
?C PE*
1
1
ML


1
1
1
|
1
                                                                1380
                                  3853
  7021
ro

-------
                     LAKE  NAME:  GCCOCUAN  R5S.
                     STORET  NUMBER:  sios
                                                                   NYGAARD TROPHIC  STATE  INDICES

                                                             DATE    04  10  73  07  19 73 09 29 73
                                                      MYXOPHYCEAN
                                                   CHLOROPHYCHAN
                                                    fiUGLENOPHYTF
                                                           DIATOM
                                                         COMPOUND
0/0 C
01/0 E
0/01 ?
0.29 ?
03/0 E
1.00 E
5.50 E
0.38 E
0.43 E
10.5 E
1.50 E
2.50 E
0.25 E
4.00 E
6.00 F
ro
CO
                                                                 PALMER'S  ORGANIC  POLLUTION INDICES

                                                            DATE    04  10  73   07  19  73   09 29 73
                                                            GENUS
                                                          SPECIES
03
00
09
03
07
00
                                                              SPECIES  DIVERSITY  AND ABUNDANCE INDICES

                                                             DATE    04 10 73  07 19 73  09 29 73
                                           AVERAGE  DIVERSITY
                                             NUMBER  OF TAXA
                                NLMBER  OF SAMPLES COMPOSITED
                                           MAXIMUM  DIVERSITY  MAXH
                                            TOTAL  DIVERSITY
                             TOTAL  NUMBER  OF INDIVIDUALS/ML
                                           EVENESS  COMPONENT
                            MSAN NUMBER OF  INDIV1DUALS/TAXA
                                     OF MOST ABUNDANT TAXON
H
S
M
;H
D
N
J
L
K
1.56
12.00
3.00
3.58
3485.04
2234.00
0.44
186.17
1529.00
2.93
33.00
3.00
5.04
10852.72
3704.00
0.58
112.24
1541.00
1.62
33.00
3.00
5.04
7695.00
4750.00
0.32
143.94
3301.00

-------
LAKE NAM5: CCCCQUAN RES.
STPRET NUMB3P: 5108
CONTINUED
                                                  04  10  73
                                                                    07  19  73
                                                                                     09  29 73
TAXA

ANABAENA
ANKI STRODESMUS
ANKISTROOESMLS FALCATUS
APHANIZOMENON
ASTERIONELLA FORMOSA
CENTRIC DIATCM
CERATIUH HIRUNDINELLA
CHRYSOCOCCLS
CLOSTERIUM #1
CLCSTEPIUM *2
COELASTRUM RETICULATUM
C3ELASTRUM SPHAERICUM
COELOSPHAERILM NAEGELIANUM
COSMARIUM
CRUCIGENIA AFICULATA
OICTYOSPHAERIUM PULCHELLUM
DINOBRYCN DIVERGENS
EUOORINA
EUGLENA
fcUGLENA #1
FLAGELLATES
FRAGILARIA ?
FRAGILARIA CFOTONENSIS
GYROSIGMA
KIRCHNFRIELLA
HELOSIRA #2
MELOSIRA DISTANS
MELOSIRA GRANULATA
 V. ANGUSTISSIMA
MELOSIRA VARIANS
MICRGCYSTIS AERUGINOSA
MICFCCYSTIS INCERTA
FORM
F1L
CEL
CEL
FIL
CEL
C = L
CEL
COL
CEL
CEL
COL
COL
COL
CcL
COL
COL
CEL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
COL
COL
S




1















3




5
4




*C

0.6


68.4















11.5


0.6

3.6
1.8




ALGAL
UNITS
PER ML

14


1529











X



257


14

81
41




S










1









3

2








?C
0.9

3.5


1.8




41.6



1.8




0.9
13.3

11.5

4.4






ALGAL
UNITS
PER ML
33

131


66
X



1541



66
X


X
33
492
X
426
X
164
•
X
X


X
S










5









2





4
1




-------
            LAKE NAME: CCCOQUAN RES,
            STORE! NUMBED: 5108
                                    :ONTINUED
ro
in
                                                                  10  73
                                                                                07  19  73
                                                                                                 09  29 73
TAXA

NAVICULA
NAVICULA #1
N1TZSCHIA
OSCILLATCRIA #1
OSCILLATCRIA #2
PANDORINA MORUM
PEDIASTRUM SIMPLEX
 V. 7
PEDIASTRUM TETRAS
 V. TETRAODCN
PHACUS ACUMINATUS
PHACUS TORTOS
SCENEDESMUS #2
SCENEDESMUS #3
SCENEDESMUS #4
SCENEDESMUS ABUNDANS
SCENEDESMUS INTERMEDIUS
 V. BICAUDATUS
STAURASTRUM #1
STAURASTRUM #2
STEPHANOCISCOS
SURIRELLA
SYNEDRA #1
SYNEDP.A DELICATISSIMA
TETRAEDRCN
TRACHELCMCNAS
TPEUBAfilA


FORM
CEL
CEL
CEL
FIL
FIL
COL
COL
COL
CEL
CEL
COL
COL
COL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL


S




















2





?C
"576


















0.6
12.1



ALGAL
UNITS
PER ML
14

X















X
14
270





S











4


5











«C
1
2.6
0.9




0.9


1.8
8.0


4.3







i.a

ALGAL
UNITS
PER ML
X
98
33


X
X
33
X
X
66
295
X

161
X
X



X

1 66
1


S








3

















«C








2.4




0.6
0.6
0.6

1.2




0.6
0.6
iLGAL
U.4ITS
FE* ML



X
X



116

X


29
29
29

58


X
X
29
29
              TOTAL
                                                                 2234
                                                                      3704
4759

-------
                   LAKE NAME: SMITH MT. LAKE
                   STORET NUMBER: 5110
                                                                 NYGAARD TROPHIC STATE INDICES

                                                           DATE   04 04 73  07 16 73  09 26 73
                                                    MYXOPHYCEAN
                                                  CHLOROPHYCEAN
                                                   EUGLENOPHYTE
                                                         DIATOM
                                                       COMPOUND
01/0 E
02/0 E
0.33 E
0.33 c
06/0 E
3.50 6
4.00 C
0.07 ?
0.50 E
9.00 E
3.00 E
4.50 E
0.20 ?
0.33 E
10.0 E
PO
                                                               PALMER'S ORGANIC POLLUTION INDICES

                                                           DATE   04 04 73  07 16 73  09 26 73
                                                          GENUS
                                                        SPECIES
    08
    03
    13
    00
    07
    00
                                                            SPECIES DIVERSITY AND ABUNDANCE INDICES

                                                           DATE   04 04 73  07 16 73  09 26 73
                                         AVERAGE DIVERSITY
                                            NUMBER OF TAXA
                              NUMBER OF SAMPLES COMPOSITED
                                         MAXIMUM DIVERSITY MAXH
                                           TOTAL DIVERSITY
                            TOTAL NUMBER OF INDIVIDUALS/ML
                                         EVENESS COMPONENT
                           ME/IN NUMBER OF INDIVIDJALS/TAXA
                          NUMBER/ML CF MOST ABUNDANT TAXON
H
S
M
;H
D
N
J
L
K
1.71
15.00
5.00
3.91
12814.74
7494.00
0.44
499.60
4329.00
2.63
27.00
5.00
4.75
49451.89
18803.00
0.55
696.41
7994.00
3.07
34.00
5.00
5.09
12454.99
4057.00
0.60
119.32
1325.00

-------
           LAKE NAME:  SMITH MT. LAKE
           STORET. NUMBER: 5110
                                   CONTINUED
PO
                                                             04 04 73
                                                                              07 16 73
                                                                                               09 26 73
TAXA

ACHNANTHES #4
ACHNANTHES LANCEOLATA
 V. DUB IA
ACHNANTHES MICROCEPHALA ?
ANKISTRODESMIS FALCATUS
APHANOTHECE ?
ASTERIONELLA FORMOSA
CERATIUM HIRUNDINELLA
CHP-CCCOCCUS
CLOST6RIUM
COELASTRUM PROBOSCIDEUM
COELASTRUM RETICULATUM
COELASTRUM SPHAERICUM
COSMARIUM
CRUCIGEMA APICULATA
C^UCIGENIA TETRAPEDIA
CYCLCTELLA STELLIGERA
DACTYLOCOCCOPSIS
OINOBRYON
DINOFLAGELLATE #1
DINOFLAGELLATE #2
EUGLENA
FLAGELLATES
FRAGILAPIA
FRAGILAKIA CROTONFNSIS
GOLFNKIMA
GQLENKINIA ?
GOMPHCNFMA
LYNGBYA LIMNFTICA
MALLCMGNAS
M:LOSIRA #2
McLQSIRA GRANULATA
 V. ANGUSTISSIMA
FORM
CEL
CEL
CEL
CEL
COL
CEL
CEL
COL
C5L
COL
COL
COL
CEL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
C5L
CFL
CEL
FIL
CHL
CEL

CEL
ALGAL
UNITS
S %C PER ML



5

















2







3





4.7

















27.1




0.4


5.8





352

X







X




X


2029




27


433


ALGAL
UNITS
S *C PER ML







2







5





4





1




1 X
1
1
1 x
1
1
5.7| 1072
1
1
15.2) 2858
1
1
1 X
0.2| 45
1 X
1
1
3.81 714
1
1
1
1 x
1 X
7.8| 1474
1
1.7| 313
1
0.21 45
1
42.51 7994
1
1 X
1
1
ALGAL
UNITS
S 1C PER ML
















5




1












3.5







0.7



0.7

11.8
0.7
0.7
0.7
0.7
32.7


0.7









141



X

X
X
28



28

479
28
28
28
28
1325
X

28



X


X

-------
            LAKE NAME:  SMITH MT. LAKE
            STORE!  NUMBER:  5110
                                   CC,MT!NU =
INJ
00
TAXA

MERISMGPEOIA TENUISSIMA
MICROCYSTIS INCSRTA
NAVICULA
NITZSCHIA
OOCYSTIS
OSCILLATORIA
OSCILLATORIA LIMNETICA
PANDCRINA MCPUM
PcRIDINIUM
PHACUS ACUMINATUS
RAPHIDIOPSIS
RAPHIDIOPSIS CURVATA
RAPHIDICPSIS CURVATA ?
SCENEDESMUS
SCENEDESMJS DIMORPHUS
SCENEOESMUS CUADRICAUDA
STAURASTRUM TETRACERUM
STEPHANOOISCUS
SYNECRA #1
SYNEOR* DELICATISSIMA
SYNEORA DELICATISSIMA
 V. ?
TETRAEDRON MINIMUM
 V. SCROBICULATUM
TETRAEDPON TRIGCNUM
TRACHEt'OMONAS
TPEUBARIA TRIAPPENDICULATA

  TOTAL
                                                                 04 73
                                                                               07 16 73
                                                                                                   26 73


FORM
COL
COL
CEL
CEL
CEL
F1L
FIL
COL
CEL
CEL
FIL
FIL
FIL
COL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
ALGAL
UNITS
S ?C PER ML

















1
4









0.7


0.4










57.8
2.5




0.7



X
54


27
X









4329
189
X



54

ALGAL 1 ALGAL
UNITS
S *C PER ML











3



















1.2

0.2


13.3

0.5
0.2



6.9


0.2


0.2

X


X

223

45

X
2501

89
45

X

1295


45'


45
UNITS
S *C PcP ML
2










3





4







13.2


0.7


1.4




13.9




0.7
10.4
4.9


0.7
0.7
Ov7

536

X
28

X
56


X

564
X
X
X
X
28
423
197

X
28
28
28

7494 18803 4057

-------
                  LAKE NAME: LAKE CHESDIN
                  STORET NUMBCP: 5111
                                                                NYGAARD TROPHIC STATE INDICES

                                                          DATE   04 07 73  07 13 73  09 26 73
                                                   MYXOPHYCEAN
                                                 CHLOROPHYCEAN
                                                  EUGLENOPHYTE
                                                        DIATOM
                                                      COMPOUND
           03/0 £
           03/0 E
           0.50 E
           0.28 7
           14/0 E
      4.50 e
      4.00 E
      0.41 5
      0.43 E
      13.5 E
      1.00 E
      1.33 E
      0/07 ?
      0.33 E
      3.33 E
                                                              PALMER'S ORGANIC POLLUTION INDICES

                                                          DATE   04 07 73  07 13 73  09 26 73
ro
10
  GENUS
SPECIES
01
00
15
00
02
00
                                                           SPECIES DIVERSITY AND ABUNDANCE INDICES

                                                          DATE   04 07 73  07 13 73  09 26 73
                                        AVERAGE DIVERSITY
                                           NUMBER OF TAXA
                             NUMBER OF SAMPLES COMPOSITED
                                        MAXIMUM DIVERSITY MAXH
                                          TOTAL DIVERSITY
                           TOTAL NUMBER OF INDIVIDUALS/ML
                                        EVENESS COMPONENT
                          MEAN NUMBER OF INDIVIOUALS/TAXA
                         NUM6SR/ML HF MOST ABUNDANT TAXON
H
S
M
H
D
N
J
L
K
3.12
40.00
3.00
5.32
3550.56
1138.00
0.59
28.45
291.00
2.26
42.00
3.00
5.39
16197.42
7167.00
0.42
170.64
43d8.00
3.06
26.00
3.00
4.70
3157.92
1032.00
0.65
39.69
284.00

-------
UKF NAME: LAKt CHESCIN
STOPET NUMiJEK: 5111
CONTINUED
                                                      07 73
                                                                   07  13  73
                                                 09 26  73
TAXA

ACHNANTHES LANC50LATA 7
ANABAENA
ANABAENA #1
ANABAENA PLANCTCNICA
ANKISTRODESMIS ?
AFHANUOMENCN ?
ASTERIONELLA FORMOSA
CAPARTOGRAMMA CRUCICULA
CERATIUM HIRCNDINELLA
CHLOROPHYTAN LUNATE CELL
CHROCCOCCUS
CLOSTERIUK
COCCOID COLONY
COELASTRUM CAMBR1CUM
CSUCIGENIA FENESTRATA
CYANCPHYTAN COLONY
CYANCPHYTAN FILAMENT
CYCLCTSLLA
CYCLOTELLA STELLIGERA
CYMBELLA TUMIDA
CYMBELLA VENTRICOSA
DACTYLOCOCCOPSIS
DINOBRYON BAVARICUM
DINOBRYCN DIVERGENS
DINCFLAGFLLATE #2
DINOFL^GELLATES
fcUASTRUM
cUPORlNA ELEGANS
6JGLENA
tJGL=NA #1
FJGLENA *2
eUGLENA #3
FORM
CEL
FIL
FIL
FIL
CEL
FIL
CEL
CSL
CEL
CEL
COL
CEL
COL
COL
COL
COL
FIL
CEL
CEL
CEL
C5L
CEL
CEL
C6L
CEL
CEL
CEL
COL
C6L
C£L
CSL
C3L
S























2








*C






6.4


7.5




1.1


1.1





20.2

1.1


1.1



ALGAL
UNITS
PER ML
X




X
73


85




12

X
12

X
X
X
X
230

12

X
12



S

2
















3













ZC

8.8
0.9

2.6







0.9





7.5













ALGAL
UNITS
PER ML

631
63

189
X


X

X

63
X




537





X

X


X
X
X
S



1














3













%c



27.5




1.7






1.7


13.8







1.7





ALGAL
UNITS
PE1 ML



284



X
18


X



18


142







13






-------
LAKE NAME: LAKE CHbSDIN
STORET NUMBER: 5111
CONTINUED
                                                  04 07 73
                                                                   07 13 73
                                                 09 26 73
TAXA

FLAGELLATES
F^AGILARIA
FRAGILARIA CPOTONENSIS
GLENODINIUM
GOMPHONEMA
GOMPHOSPHAERIA 7
GYROSIGMA
LEPOCINCLIS
LUNATE CELL
ME LOS IRA OISTANS
ME LOSIRA GRANULATA
 V. ANGUSTIS5IMA
MELOSIRA VARIANS
MEMSMOPEDIA TENUISSIMA
MICROCYSTIS AERUGINOSA
MICRCCYSTIS INCERTA
MOUGEOTIA
NAVICULA #1
NAVICULA #2
NAVICULA #3
NAVICULA #4
NAVICULA CUSPIOATA
NAVICUL* HAMBERGII
NAVICULA INTEGRA
NAVICULA PUPULA
 V. RFCTANGULA"US
NITZSCHIA
OSCILLATORI/S
OSCILLATCPIA ?
PANDOSINA MCRUM
PEDIASTRUM DUPLEX
 V. RFTICULATUK
FORM
C-rL
CEL
C = L
CEL
CEL
COL
CEL
CCL
CEL
CfcL
CEL
CEL
COL
COL
COL
FIL
CEL
CEL
CSL
CEL
CEL
CEL
CEL
CEL
CEL
FIL
FIL
COL
COL
ALGAL
UNITS
S %C PER ML
ALGAL
UNITS
S XC PER ML
1125.61 291 Kl 6.2










*















3










4.2
1.1









1.1


1.1


2.1



X
X

X
X

X
48
12






X
X
X
12

X
12


24









5
1


























3.5
61.2

1.3












0.9

0.4

442

X


X



252
4388

95
X
X
X

X
X



X
X

63

32
X
ALGAL
UNITS
S 
-------
             LAKE NAME:  LAKE CHESDIN
             STORE!  NUMBER:  5111
                                   CONTINUED
CO
ro
                                                               04 07 73
                                                                                07 13 73
                                                                                                 09  26  73
TAXA

PENNATE D1ATCM
PENNATE DIATCMS
PHACOS ACUMINATUS
PHACUS HELIKCIDES
PINNULARIA
SC6NEDESMUS #1
SCENEOESMUS »2
SCENEDESMUS #3
SCENEDESMUS BIJUGA
SCENEDtSMUS INTERMEDIUS
SCHROEDERIA SETIGERA
STAURASTRUM
STAURASTRUM »2
STEPHAN001SCLS
SUPIRELLA
SYNEORA #2
SYNEORA PARASIT1CA ?
SYNEORA ULNA
SYNEORA VAUCI-ERIAE
TABELLARIA
TETRAEDRON MINIMUM
TETRAEDRGN MUTICUM
TFACHELOMONAS #1
TRACt-f-LCMONAS #2
FORM
CEL
CEL
CEL
C=L
CEL
COL
COL
COL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
S













5










?C
9.6




1.1







16.0










ALGAL
UNITS
PER ML
109



X
12
X






162
X
X
X
X




X

S
























%c







0.4
1.8

0.4




0.9





0.4
1.3
0.4
ALGAL
UNITS
PER ML


X
X
X
X

32
126

32
X



63





32
95
1 32
S

5






















?C

6.9






1.7



3.5







1.7



ALGAL
UNITS
PE* ML

71






18
X


36


X


X
X
18



               TOTAL
                                                     1138
                                                                                  7167
                                                                                                    1332

-------
                     LAKE  NAME:  CHCKAHOMINY  LAKE
                     STORE!  \UMBSP:  5112
                                                                   NYGAARD TROPHIC STATE INDICES

                                                             DATE    04 09 73  09 26 73
  MYXOPHYCEAN
CHLOROPHYCEAN
 EUGLENOPHYTE
       DIATOM
     COMPOUND
2.00 t
3.00 E
0.20 ?
0.33 E
10.0 E
                                                                               1.75 E
                                                                               4.25 E
                                                                               0/2* ?
                                                                               0.75 E
                                                                               8.25 E
CO
CO
                                                                 PALMER'S  ORGANIC POLLUTION INDICES

                                                             DATE   0* 09  73  09 26 73
                                                            GENUS
                                                          SPECIES
    01
    00
                               17
                               02
                                                              SPECIES DIVERSITY AND ABUNDANCE INDICES
                                                             DATE
                                           AVERAGE  DIVERSITY
                                              NUMBER  OF TAXA
                                NUMBER  OF  SAMPLES COMPOSITED
                                           MAXIMUM  DIVERSITY MAXH
                                             TOTAL  DIVERSITY
                              TOTAL  NUMBfcR OF INDIVIDUALS/ML
                                           EVENESS  COMPONENT
                            MF.AN  NUMBER OF INDIVIOUALS/TAXA
                            MJM8bF/ML UF MOST ABJNCHNT  Tft XON
  09 73  09 26 73
H
S
M
;H
D
N
J
L
K
2.60
51.00
2.00
5.67
6750.80
2411.00
0.49
47.27
820.00
3.92
51.00
2.00
5.67
28776.72
7341.00
0.69
143.94
1657.00

-------
               LAKf NAME: CHICKAHCMINY LAKc
               STOP.ET NUM3Er: 5112
                                   :CNTINUED
CO
                                                                  J4  09  73
                                                                    09  26  73
TAXA

ACHNANTHES LANCEOLATA
ACTINASTRUM HANTZSCHII
ANABAENA
ANABAENA *l
ANABAENA #2
ANKISTRODESMUS
APHANUGMENON 7
ATTHEYA
CLOSTERIOPSIS
CLOSTERIUM
COCCCNE1S
COELASTPUM MICPOPGRUM
CCSCINOOISCUS
COSMAR1UM ?
CRUCIGENIA TtTRAPbDIA
CYANOPHYTAN FILAMENT
CYCLOTELLA MENEGHINIANA
CYCLOTELLA STELLIGEPA
OACTYLOCOCCCPSIS
DINOBRYON
OIPLCNEIS *1
OIPLONEIS £LLIPTICA ?
KUASTRUM
EUNOTIA
EUNOTIA INCISA
FLAGBtLATE #1
FLAGELLATtS
F^/GILARIA CROTCNF.NSIS
FRUSTULIA
GLENCOINIUM
GQMPHnNcMA VI
GOMPHCNbMA #2


FORM
CEL
COL
F1L
FIL
FIL
CEL
FIL
CEL
CEL
CEL
CEL
COL
CEL
CEL
CEL
FIL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
C£L
CSL
CEL
ceL
ALGAL
UNITS
S ?C PER ML
















5








2
















0.5
0.5




0.9

10.7






34.0



0.9
0.5

X

X






X
11
11
X


X
22
X
258
X
X
X

X
X
320

X
X
22
11
X
ALGAL
UNITS
S *C PER ML
































1
1.01 71
1
1.01 71
1 X
1.31 95
2.6| 189
2.3) 166




1.0
0.6


3.2





0.3



2.3





X



71
47
X

237





24



166






-------
             LAKE NAME:  CHICKAHOMINY LAKE
             STORET NUMBcF:  5112
CO
cn
TAXA

GYMNODINIUM
GYRCSIGMA
GYROSIGMA MACRUM
hANTZSCHIA
LAGEPHEIMIA
LYNGBYA
MALLCMONAS
MELOSIRA #2
MELOSIRA #3
MELOSIRA #4
MELOSIRA BIMDEPANA
MELOSIRA DISTANS
MELOSIRA GRANULATA
 V. ANGUSTISSIMA
MELOSIRA HERZOGII
MELOSIRA VA9IANS
MERISMOPEDIA TENUISSIMA
MICROCYSTIS INCERTA
MOUGEOTIA ?
NAVICULA #1
NAVICULA #2
NAVICULA #3
NAVICULA #4
NITZSCHIA #1
NITZSCHIA #2
NITZSCHIA *4
NITZSCHIA *5
NTTZSCHIA ACICULAP.IS
OSCILLATOPIA LIMNETICA
PSOIASTPUM BIRADI»TOM
 V. LONGECCfiNUTUM
PEDIASTPUM CUPLFX
 V. RETICUL4TUM
                                   CONTINUED
                                                               04 09  73
                                                                                09  26  73
FORM
CEL
CtL
CEL
CEL
CEL
FIL
CEL
CEL
CEL
CEL
CEL
CEL

CEL
CEL
CEL
COL
COL
FIL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
FIL

COL

COL
ALGAL
UNITS
S SC PER ML







1





3




















0.9





21.9



8. A

5.1





0.5



1.4









X
22

X


X
528



202

123

X



11


X
34
X

X
X
X




ALGAL
UNITS
S %C PEP ML







1

2
3



4



5














1
1 X
1 X
1
1 x
0.6| 47
1
15.8) 1160
1 X
22.61 1657
14.51 1065
1
1
1
5.21 379
1
1.31 95
3.51 260
4.81 355
1
0.3| 24
1.31 95


0.3 24
X

X
1.91 142
1
O.b) 47
1
0.61 47

-------
            UKE NAME:  CHICKAHOMINY LAKE
            STCRET NUMBER: 5112
GO
cr>
TAXA

PEfNATE DIATCMS
PHACUS
PINNULAPIA  42
PINNULARIA  BIHASTATA
PINNIJLARIA  STOMATOPHORA
QUADRIGULA
RHOPALODIA
SCENEDESMUS #1
SCENEDESMUS #2
SCENEDESMUS ABUNCANS
SCENEDESMUS ACUMINATUS
 V. 8ERNAPDII
SCENEDESfUS DIMORPHUS
SCENEDESMUS ECORNIS
 V. OISCIFCPMIS
SCENEDESMUS INTERMEDIUS
SCHRQEDERIA SETIGERA
SELENASTRUM
STAURASTRUM #1
STAURASTRUM LEPTOCLADUM
 V. CORNUTUM
STEPHANODISCLS
SURIRELLA
SYNEDRA
SYNECPA *1
SYNEDBA «2
TABELLARIA
TETPAEDFON
TfTRAiDFCN  MINIMUM
 V. SCROBICCLATUM
TETRAEDRCN  RcGULARE
 V. INCUS
                                    ;ONTINUED
                                                                 09 73
                                                                               09 26 73
FORM
CEL
CEL
CEL
CEL
CEL
CEL
CEL
COL
COL
COL
COL
COL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
C6L
CEL
CEL
CEL
CEL
CEL
CEL
S
4


























?C
12.1
0.5










0.5


0.5





0.5





ALGAL
UNITS
PER ML
292
11

X
X







11
X
X
11

X
X
X

11
X


X

S



























%c





0.3

1.3
0.3
0.6

0.3




0.3

4.5
0.3
0.3


1.3



ALGAL
UNITS
PER ML


X


24
X
95
24
47
X
24




24
X
331
24
24


95
X
X
X

-------
                     LAKE  NAME: OICKAHOMINY  LAKE
                     STORET  NUMBSP:  5112
                    TAX A

                    TETRASTPUM  HETEPACANTHUM
                    TRACHELOMCNAS  INTERMEDIA
CONTINUED
                                                                       04  09  73
                                                                                        09  26  73


FORM
COL
CEL
I ALGAL
1 UNITS
IS ZC PER ML
1 1 1
II 1 X
1
1
IS *C
1 1 1.31
1 1 1
ALGAL
UNITS
PER ML
95

1
1
1
1
1
CO
                      TOTAL
                 2411
                                                                                          7341

-------
                   UKS NAME: RIVANNA RES.
                   STORET NUMBER: 5113
                                                                 NYGAAPD TROPHIC STATE INDICES

                                                           DATE   07 19 73  09 29 73
                                                    MYXOPHYCEAN
                                                  CHLQROPHYCEAN
                                                   EUGLENOPHYTE
                                                         DIATOM
                                                       COMPOUND
1.00 E
2.33 E
0.20 ?
0.25 ?
4.67 E
6.00 E
2.00 E
0/08 ?
05/0 E
13.0 E
CO
00
                                                               PALMER'S ORGANIC POLLUTION INDICES

                                                           DATE   07 19 73  09 29 73
                                                          GENUS
                                                        SPPCIES
    00
    03
    00
                                                            SPECIES DIVERSITY AND ABUNDANCE INDICES

                                                           DATE   07 19 73  09 29 73
                                         AVERAGE DIVERSITY
                                            NUMBER OF TAXA
                              NUMBER OF SAMPLES  COMPOSITED
                                         MAXIMUM DIVERSITY MAXH
                                           TOTAL DIVERSITY
                            TOTAL NUMBER OF INDIVIDUALS/ML
                                         EVENESS COMPONENT
                           MEAN NUMBER OF INDIVIDUALS/TAXA
                          NUMBEF/ML  OF MOST ABUNDANT  TAXON
H
S
M
;H
D
N
J
L
K
2.79
27.00
3.00
4.75
1757.70
630.00
0.59
23.33
191.00
3.19
16.00
3.00
4.00
5209.27
1633.00
0.80
102.06
322.00

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                LAKE NAME: RIVANNA RES.
                STORET NUMBER: 5113
CO
10
TAXA

ANABAENA #1
ANABAENA #2
ANABAENA #3
ANKISTRODESMCS
APHANIZCMENCN ?
CERATIUM HIRUNDINELLA
COCCCNEIS
CDfcLASTRUM MICROPORUM
COELOSPHAERICM NAEGfcLIANUM
COSCINODISCOS
CYCLOTELLA STELLIGERA
CYMBELLA
CYMBELLA TUMICA
EJGLENA
FLAGELLATES
FRAGILARIA CROTONENSIS
MELOSIRA #2
MELOSIRA CISTANS
MELOSIRA GR/NULATA
 V. ANGUSTISSIMA
MELOSIRA VARIANS
MICRCCYSTIS AERUGINDSA
NAVICULA
NAVICULA SALINARIUM
 V. INTERMEDIA
OOCYSTIS
OSCILLATORIA
PPDIASTRUM CUPLEX
 V. RETICULATUM
PHACUS ACOMINATUS
SC6NEDESMUS EIJUGA
 V. JISCIFCPMS
                                   :CNTINUED
                                                                  07 19 73
                                                                                   09 29 73


FORM
FT[
FIL
FIL
CEL
FIL
CEL
CEL
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
COL
CEL
CEL
CEL
FIL
COL
CEL
COL
ALGAL
UNITS
S ?C PEP. ML



5










*



1



3








6.0







3.0


21.3



30.3


3.0
12.1








38
X

X
X



19
X
X
134
X


191
X
X
19
76
X
X
X
X
X
ALGAL
UNITS
S SC PER ML
1111.31 134
2111.31 184








4



5

3











4.21 69

X
X


1.41 23
1.4) 23
19.71 322



16.9

16.9
5.6


5.6










276

276
92

X
92








-------
                      LAKE  NAME:  RIVANN/5 RES.
                             NUMBER:  5113
:ONT!NUED
oo
01
i
                                                                        07 19 73
                                09 29 73
                      TAXA

                      SCENEDESMUS DENTICULATUS
                      SCENEDESMUS CIMORPHUS
                      SPHAERELLOPSIS
                      STAURASTRUM #1
                      STAURASTPUM #2
                      STAURASTRUM #3
                      SURIRELLA
                      SYNEDRA  ULNA
                       V.  ?
                      TETRAEDRCN  6RAGILE
                       V.  ?

                       TOTAL


FORM
COL
COL
CEL
CEL
CEL
CEL
CEL
CEL
CEL



S


2









?C
3.0
3.0
15.2
3.0






ALGAL
UNITS
PER ML
19
19
96
19
X
X
X
X

630


S












*C

1.4


2.8



1.4

ALGAL
UNITS
PER ML
1
1 23


46



23
1633

-------
                                   TECHNICAL REPORT DATA
1. REPORT NO.
 EPA-600/3-77-100
                              2.
                                                           3. RECIPIENT'S ACCESSION-NO.
4. TITLE AND SUBTITLE

   DISTRIBUTION  OF PHYTOPLANKTON IN VIRGINIA  LAKES
                                                           5. REPORT DATE
                                                             September 1977
                                                           6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)

 R.W. Thomas,  M.K.  Morris, L.R. Williams, W.D.  Taylor,
 F-A  Hiatt. S r   Horn
                                                           I. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGAN fZATION NAME AND ADDRESS
  Environmental Monitoring and Support Laboratory
  Office of Research and  Development
  U.S.  Environmental Protection Agency
  Las Vegas, NV  89114
                                                           10. PROGRAM ELEMENT NO.
                                                              1BA608
                                                           11. CONTRACT/GRANT NO.
12. SPONSORING AGENCY NAME AND ADDRESS
  U.S. Environmental  Protection Agency - Las Vegas,  NV
  Office of Research  and Development
  Environmental Monitoring and Support Laboratory
  Las Vegas, NV  89114
                                                           13. TYPE OF REPORT AND PERIOD COVERED
                                                              03-07-73 to 11-14-73
                                                           14. SPONSORING AGENCY CODE
                                                              EPA/600/07
15. SUPPLEMENTARY NOTES
  Previously released  in limited distribution  No.692 in the Working Paper  Series
  for the National  Eutrophication Survey.
16. ABSTRACT
         This is a data report presenting the species and abundance  of phytoplankton
  in  the 8  lakes sampled by the National  Eutrophication Survey  in the State of
  Virginia.   Results from the calculation of several water quality  indices are also
  included  (Nygaard's Trophic State  Index, Palmer's Organic Pollution Index, and
  species diversity and abundance  indices).
17.
                               KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
                                             b.lDENTIFIERS/OPEN ENDED TERMS
c. COSATI Field/Group
  *aquatic microbiology
   lake
  *phytoplankton
   water quality
                                              Virginia
                                              lake eutrophication
                                              Nygaard's trophic indices
                                              Palmer's organic pollutic
                                              indices
                                              Species diversity and
                                              abundance indices
  06 C
  08 H
  13 B
18. DISTRIBUTION STATEMENT


  RELEASE TO PUBLIC
                                              9. SECURITY CLASS/
                                                UNCLASSIFIED
                                                                        21. NO. OF PAGES
     48
                                              20. SECURITY CLASS (Thispage)
                                                 UNCLASSIFIED
                                                                        22. PRICE
EPA Form 2220-1 (9-73)

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