United States
Environmental Protection
Agency
 Environmental Monitoring
 and Support Laboratory
 PO Box 15027
 Las Vegas NV 89114
EPA 600 3-79-114
December 1979
Research and Development
Distribution of
                          in
Color*
Lakes

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                   RESEARCH REPORTING  SERIES

 Research reports of trie Office of Research and Development. U.S. Environmental
 Protection Agency, have been grouped into nine series.  These nine broad categories
 were established to facilitate further development and application of environmental
 technology.   Elimination of  traditional grouping was consciously planned to foster
 technology transfer and 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 species, and
materials. Problems are assessed for their long-and short-term influences, investiga-
tions include formations, transport,  and pathway studies to determine the fate  of
pollutants and their effects. This work provided the technical basis for setting standards
to minimize undesirable changes in  living organisms in the aquatic, terrestrial, and
atmospheric environments.
This document is available lo the public through the National Technical Information
Service, Springfield, Virginia  22161

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                                           EPA-600/3-79-114
                                           December  1979
DISTRIBUTION OF PHYTOPLANKTON IN COLORADO LAKES

                       by

  M. K.  Morris*, W.  D.  Taylor, L.  R.  Williams,
  S. C.  Hern, V. W.  Lambou,  and F.  A.  Morris*

         Water and Land Quality Branch
         Monitoring  Operations Division
Environmental Monitoring and Support  Laboratory
            Las Vegas,  Nevada  89114
       *Department of Biological  Sciences
        University of Nevada, Las Vegas
            'as 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.
                                    n

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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 resulting  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 monitoring data base for exposure assessment through
programs designed to:

              • develop and optimize systems and strategies for  monitoring
               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
13 lakes sampled by the National  Eutrophication Survey in the State of
Colorado, 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.  This 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 9. -Morgan
                                Director
            Environmental Monitoring and Support Laboratory
                               Las Vegas

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                                CONTENTS
                                                                       Page
Foreword ...............................    iii
Introduction .............................      1
Materials and Methods  ........  •  •  ..............      2
     Lake and Site Selection .....................      2
     Sample Preparation  .......................      2
     Examination ...........................      3
     Quality Control .........................      4
Results  ...............................      5
     Nygaard1 s Trophic State Indices .................      5
     Palmer's Organic Pollution Indices  ..... ..........      5
     Species Diversity and Abundance Indices .............      7
     Species Occurrence and Abundance  ................      9
Literature  Cited ...........................      1°
Appendix A.  Phytoplankton Species list for the State
             of Colorado ................. ......      11
Appendix  R.   Summary of Phytoplankton Data

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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 1975,  the Survey sampled  156  lakes in
11 States.  Over 450 algal species and varieties were identified  and
enumerated from the 430 water samples examined.

     This report presents the species and abundance of phytoplankton  in  the
13 lakes sampled in the State of Colorado (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 COLORADO
STORET No.
0801
0802
0803
0804
0805
0806
0807
0808
0809
0810
0811
0812
Lake Name
Barker Lake
Barr Lake
Blue Mesa Reservoir
Cherry Creek
Cucharas Reservoir
Dillon Lake
Grand Lake
Green Mountain Reservoir
Hoi brook Lake
Lake Meredith
Milton Reservoir
Navajo Lake
County
Boulder
Adams
Gunnison,
Arapahoe
Huerfano
Summit
Grand
Summit
Otero
Crowl ey
Weld
Archuleta



Montrose








(San Juar
J — M PJ,
   0813                 Shadow  Mountain  Lake                 Grand

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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
 1imited  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 in 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

     To preserve the sample 4 milliliters   (ml) of  Acid-Lugol's  solution
 (Prescott 1970) were added  to each  130-ml  sample from each site at  the time of
collection.  The samples were shipped  to the Environmental  Monitoring and
Support Laboratory, Las  Vegas, Nevada,  where equal  volumes from each  site

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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.

     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 ring of clear Karo® corn syrup with phenol (a few crystals of
phenol were added to each 100 ml of syrup) was placed on a glass slide.  A
drop of superconcentratefrom the bottom of the test tube was placed in the
ring.  This solution was 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
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

     Project phycologists performed internal quality control intercomparisons
regularly on 7 percent of the species identification and counts.  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
     A phytoplankton species list for the State is presented in Appendix  A.
Appendix B summarizes all  of the phytoplankton data collected from the State
by the Survey.  The latter is organized by lake, and includes 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 Appendix B.  A question mark (?) following a
calculated value in these  tables was entered when that 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

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  TABLE 2.  NYGAARD'S TROPHIC STATE INDICES ADAPTED FROM HUTCHINSON (1967)
Index
Calculation
Oligotrophi'c     Eutrophi'c
Myxophycean
Chlorophycean
Diatom
Euglenophyte
Compound
Myxophyceae
Desmideae
Chlorococcales
Desmideae
Centric Diatoms
Pennate Diatoms
Eugjenophyta
Myxophyceae + Chlorococcales
Myxophyceae + Chlorococcales +
0.0-0.4
0.0-0.7
0.0-0.3
0.0-0.2
0.0-1.0
0.1-3.0
0.2-9.0
0.0-1.75
0.0-1.0
1.2-25
                Centric Diatoms + Euglenophyta
                        Desmideae
TABLE 3.  ALGAL GENUS POLLUTION INDEX
          (Palmer 1969)
                     TABLE 4.  ALGAL SPECIES POLLUTION
                               INDEX (Palmer 1969)
Genus
Anacystis
Ankistrodesmus
Chlamydomonas
Chlorella
Closterium
Cyclotella
Euglena
Gomphonema
Lepocinclis
Melosira
Micractinium
Navicula
Nitzschia
Oscillatoria
Pandorina
Phacus
Phormidium
Scenedesmus
Stigeoclonium
Synedra
Pollution
Index
1
2
4
3
1
1
5
1
1
1
1
3
3
5
1
2
1
4
2
2
Species
Ankistrodesmus falcatus
Arthrospira jenneri
Chi ore! la vulgaris
Cyclotella meneghiniana
Euglena gracilis
Euglena viridis
Gomphonema parvulum
Melosira varians
Navicula cryptocephala
Nitzschia acicularis
Nitzschia pjilea
Oscillatoria chlorina
Oscillatoria limosa
Oscillatoria pjrinceps
Oscillatoria putrida
Oscillatoria tenuis
Pandorina morum
Scenedesmus quadricauda
Stigeoclonium tenue
Synedra ulna
Pollution
Index
3
2
2
2
1
6
1
2
1
1
5
2
4
1
1
4
3
4
3
3

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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.

     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 (H) for these types of samples can  be
estimated from the Shannon-Wiener formula (Shannon and Weaver 1963):
                               1=1

where P is the proportion of the ith taxon in the sample, which is calculated
from ni/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 number 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 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 phytoplankton taxa which were not encountered.

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     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.   This 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 al 1
phytoplankton collected at different sampling  sites on the 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
(Pielou 1966)  while the minimum diversity (MinH), was estimated from the
formula:
               MinH  .  .
given by Zand (1976).  The total diversity (D) was calculated from HN (Pielou
1966).  Also given in Appendix B 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).

      The evenness component of diversity (J) was estimated from H/MaxH
 (Pielou  1966).   Relative evenness  (RJ) was calculated from the formula:


                              D1      H-MinH
                              KJ   =
                                     MaxH-MinH

 given  by  Zand  (1976).   Zand  suggests that RJ be used as a substitute for both
 J and  the redundancy expression given by Wilhm and Dorris (1968).  As pointed
 out  by Zand, the  redundancy  expression given by Wilhm and Dorris does not
 properly  express  what  it  is  intended to show, i.e., the position of H in the
 range  between  MaxH  and  MinH.   RJ may range from 0 to 1; being  1 for the most
 even samples and  0  for  the least even samples.

      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

                                       8

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 individual  should not be used  in  direct  comparisons  involving  various samples
 which  have  different  numbers of taxa.  Since MaxH  equals  log S, the expression
 in  sits  is  equal  to logs S, or 1.  Therefore diversity in sits per
 individual  is  numerically equivalent to  J, the evenness component for the
 Shannon-Wiener  formula.


SPECIES OCCURRENCE AND ABUNDANCE

  The alphabetic phytoplankton  species  list for each  lake, presented  in
Appendix B, 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  that  the  species identified
in the preliminary examination  was in such a  low concentration  that it did  not
appear 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 entropy  of a
     sequence of independent random variables, pp.  333-336.   _I_n:  Theory of
     Probability and Its Applications (translation  of "Teoriya Veroyatnosei  i
     ee Premeneniya").   N. Artin (ed).   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 Vldensk^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 lacustrine
     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 Commu-
     nication.  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.

Wilhm, V. L., and T. C. Dorris.  1968.  Biological  parameters  for water
     quality criteria.  Bio-Science.  18:477.

Zand, S. M.  1976.  Indexes associated  with information theory in water
     quality.  J. Water Pollut. Contr.  Fed.   48(8):2026-2031.


                                     10

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                    APPENDIX A



PHYTOPLANKTON SPECIES LIST FOR THE STATE OF COLORADO
                        11

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Actinastrum gracilimum
Andbaena planetonica
Anabaenopeie airaularie
Ankistrodesmue faleatus
    v.  aeieularie
Ankistrode emus faleatus
    v.  mirabilis
Aphoniaomenon floe-aquae
Aphanoeapsa
Asterionella fomasa
Binuelearia
Carteria
Ceratium hirundinella
   f.  seottieum
Chi orogonium
Chrooeoecus dispersus
Chroocoeeus limnetieus
Closteriwn
Coccaneis plaeentula
Coelastrwn microporum
Coelastrum sphaerieum
Coelosphaerium 'k.uetzi.ng'ianum
Coelosphaerium pallidum
CosmarLum
Cryptomonas erosa
Cryptanonas marseonii
Cryptomonae i°eflexa
Cryptomonae roetrata
Cyelotella bodaniaa
Cyclotella ccmta
Cyelotella meneghiniana
Cymatopleura elliptiea
Cymatopleura solea
Cymbella mexicana
Vactylococcops-is
Diatoma tenue
    V.  elongatum
Diatoma vulgare
Dictyoephaer>ium pulehellum
Dinobryon bavaricum
Dinobryon cylindricum
Dinobryon divergene
Entomoneis alata
Epithemia
Euglena oxyur>is
   V. minor
Fragilaria eonstruens
Fragilaria crotonensis
Fragilaria leptostauron
Glenodinium edax
Gamphonema olivaeeum
Gomphoephaeria
Gymnodinium
Gyros igma
Hannaea ar>eus
Hantssehia
Lagerheimia
Lyngbya
Mai I cmonas
Melosira dietans
Meloeira granulata
   v. angustissima
Meloeira italica
Melosira varians
Meriemopedia minima
Mer>ismopedia tenuissima
Mieraatinium pus ilium
Mieroeystis aeruginosa
Mieroaystie ineerta
Mougeotia
Naviaula amphibola
Navieula euspidata
Nitssehia longissima
   v. reversa
Oedogonium
Ooeystis
Oseillator*ia limnetiea
Pediastrum boryanum
Pediaetnm duplex
Pediastrum duplex
   v. elathratum
Pediastrum duplex
   v. retiaulatum
Pediastrum simplex
   v. duodenarium
Phaeus megalopsis
Phacus pleuroneetes
Phaeus pseudonordstedtii
Phaeus tortus
Phomidium mueicola
Pi euros igma
Raphidiopsis
Rhoieosphenia curvata
Rhopalodia gibba
Seenedesmus aeuminatus
Seenedesmus armatus
Seenedesmus dimorphus
Seenedesmus quadricauda
Sehroederia judayi
Sehroederia eetigera
                                     12

-------
Spematozoopsis                           Synedra ulna
Sphaerocystie sohroeteri                  Tabellaria feneetrata
Spirulina                                 Tetraedron minimum
Spondylos-uan planwn                       Tetrviedran mutiaum
Staurastmm                               Tetrastrum elegans
Stephanadiscus dubiue                     Tetraetrum staurogeniaeforme
Stephanodisaus niagarae                   Trachelcmonas intermedia
Synedra cyclcpum                          Trachelomonas planetonica
                                     13

-------
                 APPENDIX B.  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, EUNOTIAtfl, FLAGELLATE, FLAGELLATES, MICROCYSTIS 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.
                                     14

-------
LAKE NAMEt BARKER
STORET NUMBER I 0801
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   OK 07 75  09 26 75  10 10 75
                                 MYXOPHYCEAN
                               CHLOROPHYCEAN
                                EUGLENOPHYTE
                                      DIATOM
                                    COMPOUND
1.00 E
0/01 0
0/01 ?
0.50 t
3.00 E
2.00 E
1.00 E
0/03 T
l.frO E
5.00 E
01/0 E
03/0 E
0.25 E
0.50 E
07/0 E
                                            PALMFP'9 ORGANIC POLLUTION INDICES

                                        DATE   OS 07 75  08 36 75  10 10 75
                                       GCNUa
                                     SPECIES
01
00
01
00
10
00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   05 07 75  08 26 75  10 10 75
                      AVERAGE DIVERSITY
                         NUMBER OF TAXA
           NUMBER OF SAMPLES COMPOSITED
                      MAXIMUM DIVERSITY NAXH
                      MINIMUM DIVERSITY MINH
                        TOTAL DIVERSITY
         TOTAL NUMBER OF INDIVIDUALS/ML
                     EVENNt.86 COMPONENT
                      RELATIVE EVENNESS
        MEAN NUMBER OF INDIVIDUALS/TAX*
       NUMBER/ML OF MOST ABUNDANT TAXON
H
8
M
XH
NH
D
N
J
RJ
L
K
1.25
16.00
2.00
4.00
0.02
14330,00
11464,00
0.11
0.31
716. SO
9013.00
2.00
10.00
2.00
J.32
0.04
5114.00
2557.00
0.60
O.SO
255.70
1381.00
0.99
15.00
2,00
3.91
0.03
7608,15
7685.00
0.25
0.25
512.33
6478.00
                                            15

-------
LAKE NAMKl BARKER
STOHET NUMBERI 0801
TAX*

ANABAENA
ANABAENOPRI8 CIRCULAR!*
A8TEPIONELLA FORMOSA
CARTERIA
CHtAIYOOMOINlS T
CHROOMONAS T
COCCONEI8 PLACrHTUtA
C08MARIUM
CRYPTOHONAS
CRYPTOMONAS EROSft
CRYPTOMONA8 MARSSONII
DACTYLOCOCCOPSIS
DICTYORPNACH1UM PULCHELLUM
DINOBRION ClblHCBICllM
FRAGILARIA COHSTRUENS
rRAQZLARIA CHOTONgNSId
OOMPHONCMA OLIViCCUM
CtMNOOIKIUK
HANNAE* ARCUS
NALLOMONA8
NALLOHONA8 ?
MKL08IRA DISTAN8
XRLOSIRA GRANULATA
 V. ANCURTISOIMA
XrLO«IP» ITALICA
ORCILLATORIA
prniASTRUK Bopyjmu"
PID1ABTRUM SIMPLEX
 V. DUODENARIUH
«CHRQRDCRIA 8ETIGCRA
•PONDYL08IUM PLANUM
TRACHELOMONA8

  TOTAL
                                                  OB OT
                                                                   0« It T«
                                                                                    10 10 IS
I ALGAL
I UNITS
FORM 1*  771
X
X

0.91 101
0.9| 101
O..*l It
1
1 *
1
S.ll M>
0.11 It
1 X
1 x
1
0.61 7?
t.ll 711

71,6 901]




ALOAL
UNIT8
S *C PER ML
ii a. oi si







*






i







4




I X
2.0| 11


10,0


2.0






34,0





4.0

4.0






2»*


»1



X


im





102

102




uiji.oi sea
i t i
ALOAL
UNIT8
B %C PtR ML




1
4



S











1
2











M.J
J.7



O.I











4.9
4,9

Itt




X

(471
20*



4J




X
X
X


X

174
174

121
X
X
0.11 42
1
O.SI 42
I14M a>«7 70S
                                           16

-------
LAKE NAMEt BARR LAKE
8TORET NUMBERl 0802
                                              NYGAARD TROPHIC SIATE INDICES

                                        DATE   05 05 75  08 26 75  10 10 75
                                 MYXOPHYCEAN
                               CHLOROPHYCEAN
                                EUGLENOPHYTB
                                      DIATOM
                                    COMPOUND
0/0  0
01/0 E
0/01 T
0/02 ?
01/0 E
OS/0 E
02/0 G
0/07 7
01/0 E
OB/0 E
03/0 E
02/0 C
0.20 ?
1.00 E
08/0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   08 05 75  08 26 75  10 10 75
                                       GENUS
                                     SPECIES
    00
    00
    01
    00
    05
    00
                                         SPECIES DIVRPSTTY AND ABUNDANCE  INDICES

                                         DATE    OS  05  75   08  26 75   10  10  75
                       AVERAGE  DIVERSITY
                          NUMBER Of  TAXA
            NUMBER OF SAMPLES COMPOSITED
                       MAXIMUM  DIVERSITY MAXH
                       MINIMUM  DIVERSITY MJNH
                         TOTAL  DIVERSITY
          TOTAL HUMBKP OF INDIVIDUALS/ML
                      EVENNESS  COMPONENT
                       RELATIVE EVENNESS
         MEAN NUMBER OF INDIVIDUALS/TAX*
        NUMBER/ML OF MOST ABUNDANT TAXON
H
8
M
XH
NH
D
N
J
RJ
L
K
1.79
7.00
2.00
2.81
0.03
4204.71
2349.00
O.C4
O.C4
JJ5.57
1149.00
0.46
9.00
2.00
3,17
0.03
1612.30
3505.00
0.15
0.14
189.44
3265.00
1,39
12.00
2.00
3.88
0.09
1948.78
1402.00
0.39
0.38
116.83
1012.00
                                           17

-------
LAKE HAHEl §»HR LAKE
•TOP.FT NUPHERI 0*0]
TAM

ANABAENA
APNANIEOHENON FLOS-AQUAE
CHROONONAS T
CRYPTOMONA* EROSA
CRYPTOHOHAS HARHSCJKII
cm
D1CTYOSPHAKRIUM PIILCHF.LLUM
                                   COKTINUEO
                                                  OS OS  78
                                                                    01  It  7»
                                                                                     10  10 IS
GOMPHOSPHAERIA
MCLOSIRA
MELOMKA GHANULATA
 V. ANGUSTISaiMA
NICROClSTIi AERUGINOSA
NITZSCHIA II
NITfSCHIA 12
OOCHII8
PRDIA8TP.UH DUPLEX
PHORKiniUH MUCICOLA
HCENEOESMUS ACUMINATHS
ICHROEDERIA SETIGCRA
STEPNANODISCUS
STNCDKH

  TOTAL
1 AUKAL 1 AL6AL 1 ALGAL
1 UNITS 1 UNITS I UNITS
FORM II «C PER Ml. IS %C PER ML IS »C PER ML
PIL 1 1 1 III XIII X
riL 1 1 1 IIH3.JI 12«S 11172.21 1012
CEL I4l4t.fl H4t I I
C1L 1112*.'! $79
CEL 111 «.7I IS7
CEL III 2.2) S3
COL
CEL
COL
CEL

CEL
COL
CEI.
CEL
CEL
COL
COL
COL
CEL
CEL
CEI,













2


1
1











1J.J







K





1IJ

X
1




2



1




4








2.7



2.7




1.4




X ISI S.ll 71
1
1
I
X 1
1
»« 1
11
1
X 1
t« 12
1
14
|
X 1
41 1
1
1
|
I






11. 1


S.k

».*







X



X

IS*


7S
X
7t
X


X

X

9144 ISO! 1402
                                           18

-------
LAKE NAMtl BLUE HEBA PES.
STORET NUMBERI 0003
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   08 25 75  09 30 75

                                 MYXOPHYCERN    2.00 E    01/0 E
                               CHLQROPHYCEAN    3.00 E    01/0 C
                                EUGLENOPHYTE    0/05 ?    0/02 1
                                      DIATOM    0,33 t    0/dl 1
                                    COMPOUND    6.00 E    02/0 E
                                            PALMER'S OPGANIC POLLUTION INDICES

                                        DATE   OB 25 75  09 30 75

                                       GENUS        01        00
                                     SPECIES        00        00



                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   OK 25 75  09 30 75

                      AVERAGE DIVERSITY    H      2.13      0.59
                         NUMBER OF TAXA    S     12.00      5.00
           NUMBER OF SAMPLES COMPOSITED    M      6.00      6.00
                      MAXIMUM DIVERSITY MAXH      3.SB      2.32
                      MINIMUM DIVERSITY MINN      0.06      0.01
                        TOTAL DIVERSITY    D   5249.12   2838.49
         TOTAL NUMBER OF INDIVIDUALS/ML    N   2476.00   481t.OO
                     KVENNESS COMPONENT    J      0,59      0.25
                      RELATIVE EVENNESS   RJ      0.59      0.26
        MEAN NUMBER OK  INDIVIDUAL8/TAXA    b    206.33    962.20
       NUMBER/ML OF MUST ABUNDANT TAXON    K   1324.00   4391.00
                                              19

-------
LAKE NAMEl IIUF *ES» RKS.
ITORET HUMBERI 0193
TAX*

APHUHIIONCKON rt,os-ACUA«:
ASTENIONELLA FORMOSA
CHROOHUNAS J
CRmOMONAS ER08A
CrMBILLA
rRACILARU CROTONCNStS
NJCRPCmU INCERTI
OUCISTIB
•CHROtDIRIA 1ETIGCRA
mURAITRUM
SirPHANDDISCUS
TETRAEDROM MUTICUH

  TOTAL
                                   COKTIMUKD
                                                  01 IS 75
                                                                   0* 10
                                          I
                                          I
                                          IS
                                               1C
               AtflAL
               UNITS
               PER ML
                       I
                       IS
                      ALQAb
                      UNITS
                  %C  PER ML
TIL   Mill.91  IJ24   11191.11  4)91
CCL
CCL
CtL
CCL
CCL
COL
CCL
CCL
eti
CCL
CCL
      I  I
      lllil.tl
      111  4.11
      I  I     I
      ISI  4.«1
      141  4,«l
      1
   I
4.«l
          1.11
   II
 461
 210
   I
 119
 its
   X
 119
   X
  SI
  SI

747*
             I  I    I
             111 J.»l
             141 1.91
             I  I    I
             111 1.91
                       IS
                           1.0
91

91
                                   47
                                                                     4111
                                             20

-------
LAKE NAMEl CHERRY CREEK
STORET NUMBERI  0804
                                              NYGAARD  TROPHIC  STATE  INDICES

                                        DATE   05 07 75   09  22 75   10  09  75
                                 MYXQPHYCEAN
                               CHLOROPHYCEAM
                                GUGIKNOPHYTE
                                      DIATOM
                                    COMPOUND
0/0 0
01/0 E
0/01 »
0.17 1
02/0 E
1.00 E
0/01 0
1.00 E
0.23 T
5.00 E
0.50 B
1.29 E
0.71 E
0.3) E
3.50 G
                                            PALMER*S CRUAKIC POLLUTION INDICES


                                        DATE   05 07 79  08 22 75  10 09 75
                                       GENUS
                                     SPECIES
     00
     00
04
00
02
03
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES
                                        DATE

                      AVERAGE DIVERSITY
                         NUMBER OF TAXA
           NUMBER OF SMPLES COMPOBITKD
                      MAXIMUM DIVERSITY MAXH
                      MINIMUM DIVERSITY MINH
                        TOTAL DIVERSITY
         TOTAL NUMBER Or INDIVIDUALS/ML
                     EVENNFSB COMPONENT
                      RELATIVE EVENNESS
        MEAN NUMBER OF  INDTVIDUALS/TAXA
        NUMBER/ML OF MOST ABUNDANT TAXON
05 07 75  08 22 75  10 09 75
H
S
M
XH
NH
D
N
J
RJ
L
K
2.15
12.00
3.00
3. 58
0.09
3614.15
1681.00
o.6o
0.60
140.01
841.00
2.53
24.00
3.00
4.56
0.10
7293,99
2883.00
O.SS
0.55
120.13
920.00
2.51
27.00
3.00
4.75
0.32
2281.59
909.00
0.53
0,50
33.67
373.00
                                           21

-------
LAKE HAKEI CHERRY CRBEK
STORE! NUMBER I 0104
TAX*

ANABAENA
ANABAtMUPSIS
ANKISTRODCSMUB fALCATO*
 V. ACICULARIS
ANK18TRODE8MUS FALCATUft
 V. MIRABIL18
A8TERIONELLA FORMOSA
RINUCLCARIA
CHROOMONA8 t
CLO8TERIUM
CLOITERIUN I]
CL08TERIUM II
COCCUNEI8 PUACrNTUlA
COELOSPHAERIUM PAtLIDUf
COSMAR.IUM
CRYPTOMDNA8 EROBA
CRYPTOMONA8 MAP880HII
CRYPTOMONA8 RC.FLEXA
CRYPYOMONA8 ROSTRATA
CYNATOPLEURA ELLIPTICA
CIMATOPLEUlt* SOLEA
CYMHELLA II
CYMBELtA MEXICANA
PIATOMA YENUE
 T, ELON6ATUM
DIATOHK YULOARE
EPITHEMIA
EUGLENA OITURJd
 V. MINOR
FLACELtATE
fRASILAKIA CROTONF.HBIB
OOMPHONEMA
OYRQIICMA
HAim»CHlA
CCLOtlMA ORANULAYA
 ». ANGU8T1SSIMA
MRLOSIRA ITALICA
KELUilIRA YARIAN1
DOUCEOTIA
DAVICUbA It
NAVICUbA 12
HAVICULA AMPHIROLA
KIYZICH1A
WIYESCHIA LONGISSIMA
 Y. REVER8A
OEDOOONItlM
OOCYSYII
PEUTAITRUH DUPLEX
 V. CbATHRATUM
PNACUS PLEURONECTE8
PHACUI YORYUB
RH01COSPHEN1A CURVATA
RHOPALODIA GIR8A
»L-SNEDt»MU» uUADRICAUDA
8TAURAITRUN
»YEPHA»ODI»CU1
•TEPHAHODI8CUS NIAGARAE
8YMEDRA ULNA
YRACHEIiUHONAg
YRACNELONONAS INTERMEDIA
TRACHELOMONA1 PUABCTOMJCA

  TOTAfc
                                   CONTINUED
                                                  05 07 75
                                                                   0« 92 19
                                                                                    10 Of 71
FORM
PII.
PIL
Ctb
CEL
en
FIL
CEL
CEL
CEL
CEL
CCb
COL
CEL
CEL
CEL
CEL
CCL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CEL
CCL
CEL
CEL
CEL
CEL
ML
CEL
PIL
CEL
CEL
CEL
crt
CEL
TIL
COL
COL
CIL
CEL
CEl
CIt
COL
CIL
CEL
ML
CEL
ML
CEL
CEL
8




4

7







1

S































1





«c



Ifl
»«.*

90.0







18.7

J.'

1.*
















I.I












».J





ALCAI.
IINIT8
PER ML



11
249

141






X
210

»1
X
11










1





11












lit

X



8













9






4
2




1






















)




tc





«.J







*.4





4.1
a.t
31.9




11.*
2.1







10.6













8.4




AM1AL
UNITS
PER ML
X



X
121
X



X

X
114





111
«1
920

X


410
41


X

X
X
X
107


X
X




X
X



114

X


8



4









1

a

































I


11
I
»c



u.«









11. •

11.*















4,»








4.1





4.<


4.1


141.0
1
AL0AL
UNIT8
PER ML

X
X
124









114

114






X

X
X
X

X


41




X
X


41
X
X
X


41
X

41


I 1T1
1 X
                                                     1M1
                                                                      2111
                                                                                        •Of
                                             22

-------
LAKE NAME! CUCHARAS RES.
STORET NUMBER! 0805
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   09 71 75
                                 NYXUPHYCEAH    02/0 X
                               CHLOROPHYCEAN    06/0 E
                                EUGLENOPHYTE    0.13 7
                                      DIATOM    0.31 E
                                    COMPOUND    10/0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   OB 91 73

                                       OENU8        16
                                     HBECIES        09



                                         SPECIES DIVERSITY  AND ABUNDANCE INDICES

                                        DATE   08 31 79
                       AVERAGE  DIVERSITY     H       1.73
                          NUMBER  OF  TAXA     8      15,00
            NUMBER  Of  SAMPLES COMPOSITED     M       1.00
                       MAXIMUM  DIVERSITY  MAXH       3.91
                       MINIMUM  DIVERSITY  NINH       0.00
                         TOTAL  DIVERSITY     D  137102.84
          TOTAL NUMBER Of INDIVIDUALS/ML     N   73897,00
                      FVENNrS*  COMPONENT     J       0.44
                       RELATIVE EVENNESS    RJ       0.44
         MEAN NUMBER Or INDIVIDUALB/TAXA     L    4926.47
        NUPKER/ML or HURT ABUNDANT TAXON     K   42045.00
                                             23

-------
LAKE HAKE i CUCHARM RM,
STORE? NUMBERI 080S
TAIA

ftCTIMASTRMN GR»CTLIMIIN
ANKIKTKODfSMUS TAUCATUS
 V, ACICULARIS
CHROOMONAS 1
CKIPTOMONAS
CI»«OPH»TAII
CYCbOTELliA
DACTILOCOCCOPail
KVQbENA
HICRACTIIIIUM PIUILL'IM
NAVICULA
HITtSCKIA
HITMCHIA tONSISKIMA
 V. dtVCRSK
OOCtlll*
8CEKCDESHU8 D1NDNPNUS
fCHCDMMUl OUADR1CAUDA

   TOTAL
                                   CaNHNUED
                                                   01  II  79
rORM
COL

cu
CtL
en
rib
CCb
eci/
CIL
COL
C£L
ML

CtL
CEb
COL
COL
«


1


1
4
2








IS
ALOAL
UNITS
%C PER ML
O.Ji 212
1
6.11 4672
0.9) 6J7
0.11 212
11.71 2I21S
4.0| 2171
54, »| 4204S
O.Jt 112
0,»» 4JS
I X
D.9I »)7
1
0.11 212
1 X
1 X
1 0.6| 428
71*47
                                               24

-------
LAKE NAME| DILLON
8TURET NUMBERI 0806
                                              NYCAARD TROPHIC STATE INDICES

                                        DATE   08 28 75  10 19 78


                                 MYXOPHYCEAN    0/0  0    01/0 E
                               CHLOROPHYCEAN    01/0 E    01/0 E
                                IUGLENOPHYTE    0/01 T    0/03 T
                                      DIATOM    0.19 E    0/04 T
                                    COMPOUND    02/0 [    02/0 E
                                           PALNl'RiS ORGANIC POLLUTION INDICES

                                       DATE   08 25 73  10 19 75

                                      6ENUS        00        00
                                    SPECIFB        00        00



                                        SPECIES DIVERSITY AND ABUNDANCE INDICES

                                       DATE   08 98 79  10 19 75

                     AVERAGE DIVERSITY    H      9.10       1.80
                        NUMBER Of TAXA    8      9.00      12.00
          NUMBER Or BAHPLES COMPOSITED    M      4.00       4.00
                     MAXIMUM DIVERSITY MAXH      1.17       3.58
                     MINIMUM DIVERSITY MINK      0.03       0.03
                       TOTAL DIVERSITY    D   7606.20   10866,60
        TOTAL  NUMBER Or INDIVIDUALS/ML    N   3692.00    6037.00
                    EVENNESS COMPONENT    i)      0,66       0.50
                     RELATIVE EVENNESS   RJ      0.66       0.80
      MEAN NUMBER  OF INDIVIDUALS/TAXA    L   409.44    SOS.06
     NUMBER/ML  Or  MOST  ABUNDANT  TAXON    K   1537,00    3297.00
                                       25

-------
IAKI NANCl DILLO*
1TOIIIT IUNIKRI 0101
TUA

AMUTIIODIMUS riLCATU*
A*T(RION[bLA roNKOl*
CHROOCOCCU* LIHMTICU*
eoceoio COLONY
C*Y»TONOIUI IMS*
cm
DINOIfttON
lUDORINA
rbJka«,utc it
m»au*»i» CMITONIIIIU
COKTMUCO
                                                 01 II 71
                                                                  10 It II
         ITALIC*
NOUatOTIk
OOCHTIf
•INCDR* CYCbOPUM
romi
»L
CCL
COL
COL
Clt
CIt
Ctl
cot
CCb
ctt
eel
cct
ra
Ctl.
CKL
en.
AbtAL
ON It*
• «C »M NL
1 1 I
ll»,7| 104
1 1
1 1
11*. 71 711
1 1
IIO.«| 114
1 1 X
142.41 l»17
110.41 114
1 1 I
1 1 I
1 1
1 1
1 1
1 1
I
















%c

»4.»

1.1
4.»
I.I


t«.o
14. «






ALOAL
unit*
Kit HI

141*
I
(1
170
111
I

4*0
1J»7


X
X
X
X
                                                   1*11
                                                                    •Oil
                                            26

-------
LAKE NAMCl GRAND LAKE
3TIJRET NUMBER I 0807
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   08 26 75  10 10 75
                                 MYXOPHYCEAN
                               CHLOROPHYCEAN
                                EUGLENOPHYTE
                                      DIATOM
                                    COMPOUND
1.50 C
0.50 T
0/04 I
1.00 E
a.so E
1.00 E
1.00 C
0/02 ?
0.50 C
3.00 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   08 26 7S  10 10 75
                                       GENUS
                                     SPECIES
    01
    00
    01
    00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   08 26 75  10 10 75
                      AVERAGE DIVERSITY
                         NUMBER Or TAX*
           NUMBER OF SAMPLES COMPOSITED
                      MAXIMUM DIVERSITY MAXH
                      MINIMUM DIVERSITY MIHH
                        TOTAL DIVERSITY
         TOTAL NUMBER OF INDIVIDUALS/ML
                     EVENNESS COMPONENT
                      RELATIVE EVENNESS
        MEAN NUMBER OF  INDIVIDUALS/TAX*
       NUMBER/ML Of MOST ABUNDANT TAXON
H
ft
M
XH
NH
D
N
J
RJ
L
K
1."
9.00
2.00
3.17
0.09
1695,07
1003.00
0.53
0.52
111.44
521.00
2,18
9,00
2,00
3.17
0,11
1702,58
781,00
0,69
0,68
86,78
339,00
                                           27

-------
LAKE ftAHEl 
-------
LAKE NAMEl GREEN MOUNTAIN
STORE! NUMBER I  0008
                                              NYCAARD TROPHIC STATE INDICES

                                        DATE   08 25 75  10 09 75

                                 MYXOPHYCEAN    0/0  0    0/0  0
                               CHLOROPHYCEAN    0/0  0    0/0  0
                                EUGLENOPHYTE    0/0  ?    0/0  T
                                      DIATOM    0.50 E    0.33 E
                                    COMPOUND    01/0 E    01/0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   08 ?5 75  10 09 75

                                       GENUS        01        01
                                     SPECIES        00        00



                                         SPCCIE6 DIVERSITY AND ABUNDANCE  INDICM

                                        DATE   06 95 75  10 09 75

                      AVERAGE DIVERSITY    H      n.59      1.11
                         NUMBER Or TAXA    S      ft.00      6.00
           NUMBER Or SAMPLES COMPOSITED    M      3.00      3,00
                      MAXIMUM DIVERSITY MAXH      2.51      2.58
                      MINIMUM DIVERSITY MINH      0.02      0.06
                        TOTAL DIVERSITY    D   3354.98   1006.77
         TOTAL  NUMBEP OF INDIVIDUALS/ML    N   3822.00     907.00
                     EVENNESS COMPONENT    J      0.'23      0.43
                      RELATIVE EVENNE.88    RJ      0.23      0.42
        MEAN  NUMBER OP  INDIVIDUALS/TAXA    L     637.00     151.17
        NUMBER/ML OF MOST ABUJiDANT TAXON    K   3470.00     *35.00
                                            29

-------
LAKE NAHEl CREEK MOUNT*IN RES.
8TORCT NUMBER I 0*08
TAXA
ASTER.TONELLA FORMOSA
CHROOMONAft 7
                                   COMTINUrt)
                                                  01 3S TS
                                                                   >0 0* 7S
CYCLOTCLLA COKTA
CYKBELLA
DINOBRYON
rOAGILAtllA CROTONEHSIB
QOKPHOKCMA
HANNABA ARCU8

  TOTAL
FORK
CEL
CEL
CM.
CtL
CCL
CEL
en.
CEL
1
1
IS
111 1
1 1
141 1
III 1
1 1
1 1
lll«0
1 1
1 1
1C
.81
1
.11
.SI
1
.11
1
1
ALCAL
UNITS
PER ML
112
X
II
113
X
1470
1
1
IS 1C
1 1 1
1 1 1
111 ».»!
11170.01
1 1 1
1 1 1
1X11.41
1 I t
1 1 1
ALOAL
UNITS
PER ML
to
61S
X
112
X
X
                                                    JI92
                                                                      • 07
                                                30

-------
LAKE NAMEI HOLBROOK LAKE
STORET NUMBER! 0809
                                              NYCAARD TROPHIC STATE INDICES

                                        DATE   OB 06 75  08 21 75  10 07 75
                                 MYXOPHYCEAN
                               CHLOROPHYCEAN
                                EUGLENOPHYTE
                                      DIATOM
                                    COMPOUND
 02/0 E
 10/0 E
 0.42 E
 0.17 T
 18/0 E
05/0 E
05/0 E
0.10 ?
2.00 E
13/0 E
S.OO E
5.00 E
0/iO ?
2.00 E
12.0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   05 06 75  08 21 73   10 07 75
                                       GENUS1
                                     SPECIES
     20
     07
    12
    00
    08
    00
                                         SPECIES DIVERSITY  AND  ABUNDANCE  INDICES
                                        DATE

                      AVERAGF. DIVERSITY
                         NUMBER OF TAXA
           riUHBER OF tfArfE>LE8 COMPOSITED
                      MAXIMUM DIVERSITY MAXH
                      MINIMUM DIVERSITY MINH
                        TOTAL DIVERSITY
         TOTAL NUMBER OP INDIVIDUALS/ML
                     EVENNESS COMPONENT
                      RELATIVE EVENNESS
        NKAN  NUMBER OF  INOIVIDUAL8/TAXA
       NUMBER/ML OF MOST ABUNDANT TAXON
05 06 75  08 21 75  10 07 75
H
S
M
XH
NH
D
N
J
RJ
L
K
2.00
27.00
1,00'
4.75
0.01
132836.00
66418,00
0.42
0.42
2459.93
36005.00
1.89
17.00
1.00
4.09
0.01
99444.34
52616.00
0.46
0.47
3095.06
33166.00
1.90
18.00
1.00
4.17
0.01
10*071.90
S6301.00
0.46
0.46
3117.83
30347.00
                                            31

-------
LAKE NAME! HOLRHUOK LAKE
STORM NUMBERl 0809
TAXA

ACTIMA8TOUM GRACIblNim
ANABAENA
ANARAKNOP8I8 CIRCULARI8
ANA8AENnP8Id 8EHIAtA T
ANKISTRODESMUS FALCftTIIS
 V. ACICULARI8
CHROOMOKM t
CLU8TERIUM
COEtiASTRUM HICROPOI-UM
COELASTRUM 8PHAERICUM
CPYPTUM()N»8 ECUS*
CRIPTONONA* MARR80NII
CILINDNI1THECA T 6KACILI8
DIATOHA TCNIIE
 V. ELONOATUM
DICTIOSPHAERIUN PULCHELLIIM
CUOLENA
CUOLENA It
fLAGELLATC
GLENOniNIUM
GYRU8IGNA
NAV1CULA
NAVICULA CU8PIDATA
HITI8CH1A LONCI88IMA
 V. REVER8A
OOCY8TI*
OCClltiDTDRIA II
OSCILLATOR!* I]
OICILbATORIA LIMNETICA
PCDIAVTRUN BORYANUM
PEDIABTMUN DUPLEX
 V. RETICULITUM
PIIACU8 MCCALOP8I8
PHACU8 PSrUDONORDCTCDTII
•CENEOECMUf ACUHINATU*
•CEREDESMU8 DlNORPHUa
•CCNCDESMUS QUADR1CAHDA
•CENEOESMUf 8PP.
•TEPHANDDI8CU8
8TEPHANODI8CUS DUBIU8
SYHtDRA T
TETRASTRUN tLtCAMS
TETRAITRUN 8TAUROCENIAEFORME
TRACHILOHO»»8

  TOTAL
                                   CONTINUED
                                                   09  DC  79
                                                                    08  It  78
                                                                                     10 07  78
PORN
COL
riL
ru
Ml
CEL
CIL
CEL
CEL
COL
CCb
CEL
CEb
CEL
COL
CEL
CCL
CCL
CEL
CEL
CCL
CCL

CCL
CCL
riL
FIL
ru
COL

COL
CCt
CCL
COL
COL
COL
COL
CCL
CCL
CCL
COL
COL
CCL
8









4






8









1










]
1



At.CH L
UNITS
%C PER Mb
X



2.0 1115


X

1.0 197}

X
0.7| 491
O.JI 1*4
1 X
0.51 119
t.II «OI)
0.91 }29
O.JI IM
1 X
1 X
1
I
1 X
1
1 X
S4.ll 1*005
1 X
1
1 X
0.7| 491
1 X
0.81 119
1 X
0.11 184
1
1
1.11 1117
14.81 1(440
|
1
1 X
a

i

i


















5

1

4















%c
0.1
4.11
1.7
61.0





4.0












1.1

tt.O

4.9








2.9

o.«

0.1


ALSAL
UNITS
PER ML
1 181
1 1111
1 90S
11188





lilt




X


X




iioc

1441

18*1
X




X
X

tsoi
1 X
102

1 181
1
1
1


s
1





4












1

1

















%c


!.»
SI. 9





1.1
0.9






0.1




11.1

ai.i

i.t










1.4




ALOAL
UNITS
PER ML

X
«9t
10147

X
X

X
109t
499


X



too




749T

11077

991





X



X
799

X
X

                                                   *«41I
                                                                     aim
                                                                                      snot
                                              32

-------
LAKE NANEl LAKE MEREDITH
BTORET NUMBER! 0810
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   OS 06 75  08 31 75  10 07 75
                                 MYXOPHYCEAN
                               CHLOROPHYCEAN
                                EUGLEMOPHYTE
                                      DIATOM
                                    COMPOUND
tu.0 E
4.00 E
0.14 T
0/05 ?
16.0 r
8.UV E
6.00 E
0.07 ?
0,33 E
16.0 E
08/0 E
03/0 E
0.09 7
0/03 T
12/0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   OS 08 75  08 21 75  10 07 75
                                       GENUS
                                     SPECIES
    20
    00
    11
    06
    08
    00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   OS 06 75  08 21 75  10 07 75
                      AVERAGE DIVERSITY
                         NUMBER OF TAX*
           NUMBER OF SAMPLES COMPOSITED
                      MAXIMUM DIVERSITY MAXH
                      MINIMUM niVERBITY MINH
                        TOTAL DIVERSITY
         TOTAL NUHBFP OF IMPIVIDUALS/KL
                     EVENNESS COMPONENT
                      RELATIVE EVEKKESS
        MEAN NUMBER OF  INDIVIDUAL8/TAXA
       NUMBER/ML OF MOST ABUNDANT TAXON
H
s
M
XH
NH
D
N
J
RJ
L
K
2.93
26.00
3.00
4.70
0.01
94741.55
32335.00
0.62
0.4J
1243.65
11340.00
1.82
21.00
3.00
4.52
o.on
315247.66
173213.00
0.40
0.41
7531.00
85012.00
0.22
15.00
3.00
3.91
0.00
209863.48
953934.00
0.06
0.06
63599.60
930950.00
                                           33

-------
LAKE NANCl LAKr MtRKDkTH
STORE! NUMBERI 0110
TAX*

ANABAENA
ANABAENOP8I8 CIRCUHRIH
ANKIBTItODEBMUS
APHANOCAPSA
APHMIOTHECE T
CHLOROGOMUM
CHRDOCOCCUB
CHROOCOCCU8 DISPERSUS
COELOSPHAEMUH
COEL08PHAEMUN KUETIINGIAHUM
C08MADIUH
CRYPTOMOCAS MOSA
CYCLOTEtLA MENEUHINIANA
CYLINDROTHECA t CRACILI8
DACTYLOCOCCOP8IS
CNTOHOIir.18 ALATA
EUGLEN*
FLAGELLATE
FRACILARIA CROTONENBIS
GLENODIN1UM
GLENODIHIUM EOAX
GYROSIGMA
GYROBIGMA MACRUH 7
LAOERHEINIA
LfHOBTA
MERI8MOPEDIA MINIM*
KERI8MOPEDIA TCNUI8SINA
NICROCY8TI8 INCERTA
NATICULA
OOCT8TI8
08CIbI/ATDMIA It
OBCItiLATORIA 12
D8CILHTORIA LIMNETIC*
PHACU8
PHACU8 MEGALOP8I*
PliEUROIIGHA
8CENEOE8NU8 ACUNINkTUS
8CENEDEBHU8 OUACRICAUDA
8CHROEDHRIA 8ITIGERA
BPERMATOXOOP8I8
BPIRULIH*
TtTRAEDHOH MINIMUM
TETRA8TRUN BTAUROGENIAEfORMI

  TOTAL
                                   CONTIRUEO
                                                  OB 0* 73
                                                                   01 11 7»
                                                                                    10 07 7S
rDRM
rit
rit
CEL
COL
COL
CEL
COL
COL
COL
COb
CCL
CEL
CCL
CEr.
CCL
CEb
CEL
CEL
CCL
CEL
CCL
CEL
CCL
CCL
riL
COL
COL
COb
CEL
CEL
PIL
FTL
riL
cct>
CRL
CCL
CCL
COb
CCL
CKb
CEL
ALOAL 1 ALGAL
UNITS | UHIT8
8 «C PEN ML 18 *C PER ML
1 1 131 6. (I 11477
41 3.71 B7I 141 2.0| 1400











1


t













)

a








cct i
COL 1
I
!.4I 17SC

It
X


X
X


20,41 H««
a, ii 7i2
0.21 71
J.4I 1171
10. H I4II
1 X
1.91 512
|
1
0.21 71
1
0.71 219
I
1 X
1
O.JI 146
a.ti *ti
10. »| 1411
!
IS. 11 11140
1
1.11 !»•
0.71 21»
1.4| 4J9
t X
1
1
1 X
1
1 X









s














1





2










1 X
1
t
1
t
1
0.91 1411
1
0.21 42f
1.01 1700
4.41 til
1 X
1
1
1 I
1
1 I
1
0.21 42S
1 X
1
0.21 425
1
0.21 421
4t.!l ISOU
l.tl 1*11
1
O.il ISO
1
0.11 111
It. II 4J7S9
1
1
1
1
0.11 211
1 X
0.31 ISO
1
1 X
1
ALGAL
UNITS
S %C PER ML
1 1
21 1.41 110*1











J








S







4

1












0.1


0.0
0.2




0.2








0.1

0.1





0.2

•7.4
O.I

O.I







11(4


2*1
201S




14SS








171

ll«4

X


X
14SS

tlOfSO
sia

sia
X




O.«| 291
1
                                                   12118
                                                                   171211
                                                                                    9S1»J4
                                                34

-------
LAKE NAME! MILTON RES.
STORET NUMBERl 0811
                                              NYGAARD TROPHIC STATE INDICES

                                        DATE   OS 06 75  08 26 75  10 10 75
                               CHLOROPHYCEAH
                                EUGLENOPKYTC
                                      DIATOM
                                    COMPOUND
01/0 E
03/0 IE
0/04 T
0/01 7
04/0 E
      02/0 E
      02/0 E
      0/04 J
      0.37 E
      07/0 E
1.00 I
6.00 E
0/07 7
0,50 I
9.00 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   05 06 75  08 26 75  10 10 78
                                       GENUS
                                     SPECIES
04
04
              01
              00
    04
    02
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   05 Oft 75  08 26 75  10 10 75
                      AVERAGE DIVERSITY
                         NUMBER OF TAXA
           NUMBER Or SAMPLES COMPOSITED
                      MAXIMUM DIVERSITY MAXH
                      MINIMUM DIVERSITY MINH
                        TOTAL DIVERSITY
         TOTAL NUMBER Or INDIVIDUALS/ML
                     EVENNESS COMPONENT
                      RELATIVE EVENNESS
        MEAN NUMBER Or INDIVIDUALS/TAX*
       NUMBER/ML OF MOST ABUKDAHT TAXON
H
8
M
XH
NH
D
N
J
RJ
L
K
2, SO
8.00
2,00
3,00
0,17
1020,00
408.00
0,83
0.83
51.00
102,00
3.14
18.00
2.00
4.17
0.09
7878.26
2509.00
0.75
0.75
139.39
406.00
2.48
16.00
2.00
4.00
0.23
1798.00
725.00
0.62
0.60
45.31
272.00
                                          35

-------
LAKE NAKTI NI1-TON «rB.
STORM NUMBERI 0911
T»XA

ANABAENA PLANCTONKA
APHANIZOMENON FLOS-AQUAE
ABTIRIONELLA FORMOSA
CHROOMONAB I
CLOSTCRIUM
CDCCONEIB PLACCNTUI,*
COELA8TRUM MICROPOHUN
CRTPTOMONAS
CRYPTOMONA8 ER08A,
CHTPTONONAS MARSSONII
CYANOPNYTAN FILAMENT
CYCLOTKLLA »(ENt:UHlllIAN«
                                   CONTIIIUtO
                                                  09 0« 75
                                                                   01 J» 7»
                                                                                    ID 10 75
FRAGILARIA 12
rRAOILARIA CROTOHF.NSie
MBLOSIRA nlKTANS
MELOBIRA 8RANULATA
 V. ANOUSTH3IHA
NAVICULA II
NAVICULA It
NAVICULA II
NAVICULA 14
NITI8CHIA
OOCTBTIB
PCDIABTRUM BORTANUN
PEDIABTRUH SIMPLEX
 V. DUODENAHIUM
PCHHATf DIATOM

BCENEDEBNUB OUAORICAVDA
8CHROEDEHIA

BCHRnEDERI* JIIDATI
RCHROEDERIA BETIGEP*

BPHAEROCTBTIB (ICHHOETtHl
BTEPHANODIKUK

TABELLAMIA FENeSTRATA


  TOTAL
rn»«
TIL
FIL
CEL
CEL
Ctb
CEL
COL
CCL
CEL
CEL
riL
CEL
TEL
CEL
CEL
CEL
CCL
CEL
CCL
CEL
CCL
CIL
cot
COL
cob
eei,
COL
CCL
eei.
ctt.
cot
CCI.
CCL
ALGAL
UNITS
8 %C PER ML



4




5
a













t





i






3S.O




1J.S
U.5













JS.O


IJ.»


JJ.5




X

102




St
SI




X








102


SI


SI



ALOAL
UNITS
S 1C PER ML
1111.21 112
1 t
2114.11 1««
sm.ji 4ot










3

4
















1
J.9I 74


4.4




10. J
11. t
11. •
11. t










l.»






S
111

X
X
X
as*
19J
2>S
1*1


X
X


X



T4




X
ALOAL
UNITB
B *C PC* ML
1 1
21 6.21 4S
1 1
4)17.91 272





1

8









1
















(.2

12. i









IS.S
«.2


12.*







X

X


48

V!





X
X


lit
48
X
X
•i


X

X
X

40S
                2SO«
                                                                                        728
                                            36

-------
LAKE NAMEt NAVAJO LAKE
8TORET NUMBERI 0813
                                              NY1AARD TROPHIC STATE INDICES

                                        DATE   OB 18 75  09 30 78
CHLOROPHiCEAN
       DTATPM
     COMPOUND
i.oo E
1.00 E
0/03 »
0/03 ?
3.00 E
                                                          oi/o &
                                                          0/0  0
                                                          0/01 I
                                                          0/0  T
                                                          01/0 E
                                            PALMER'S ORGANIC POLLUTION INDICES

                                        DATE   08 18 75  09 30 75
                                       GENUS
                                     SPECIES
    00
    00
                               00
                               00
                                         SPECIES DIVERSITY AND ABUNDANCE INDICES

                                        DATE   08 18 75  09 30 75
                      AVERAGE DIVERSITY    H      0.73      1.1S
                         NUMBER OF TAXA    S      8.00      S.OO
           NUMBER OF SAMPLES COMPOSITED    N      7.00      7.00
                      MAXIMUM DIVERSITY MAXH      3.00      3,33
                      MINIMUM DIVERSITY MINK      0.23      o.os
                        TOTAL DIVERSITY    0    337.53   1U2S.80
         TOTAL NUMBEK OF INDIVIDUALS/ML    N    316.00    693.00
                     EVENNESS COMPONENT    J      0.34      O.BO
                      RELATIVE EVENNESS   RJ      0.18      0.49
        MEAN NUMBER OF INDIVIDUAL3/TAXA    L     39.30    178.40
       NUMBER/ML Of MOST ABUNDANT TAXON    K    353.00    605.00
                                         37

-------
LMCC imti M»»»JO in.tr.
8TORET WUMBBRI Otl?
TAXA

APHANIIOHINON FL08-ACUHE
CERATIUM HIRUNDINELLA
 F. SCOT11CUM
CHROONONAS f
CRIPTOMONAI
CUtPTOMOHXS tR08>
CRtPIUMOM»« MHHSSONII
c»»t
                                   COHTINUCD
                                                  01 1* 75
                                                                   09 10 71
8PHABROCY8TIB aCHRC
-------
LAKE NAMEl SHADOW HTN. LAKE
STORE! NUMBER I 08J3
                                              NYRAARD TROPHIC STATE INDICES

                                        DATE   OR 26 75   10 10 75
                                 MYXOPHtrCEAi?
                               CHLOROPHYCEAN
                                      DIATOM
                                    COMPOUND
3.00 K
4.00 e
0/07 7
0.25 ?
8.00 E
i.oo e
3.00 E
0/04 ?
0.25 ?
6.00 e
                                            PALMER*S ORGANIC POLLUTION INDICES

                                        DATE   OB 26 75  10 10 75
                                       GENUS
                                     SPECIES
    05
    00
    01
    00
                                        SPECIES DIVERSITY  AND  ABUNDANCE  INDICES

                                       DATE   0«  26 75   10  10  75
                     AVERAGE DIVERSITY    H      2,97      2.50
                        NUMBER Or TAXA    S     15.00     22.00
          NUMBER OF SAMPLES COMPOSITED    M      3.00      3.00
                     MAXIMUM DIVERSITY MAXH      3.91      4,46
                     MINIMUM DIVERSITY MINH      0,07      0.14
                       TOTAL DIVERSITY    D   7623.99   4452.50
        TOTAL NIIMPKH Or INDIVIDUALS/ML    N   2567.00   1781.00
                    EVENNESS COMPONENT    J      0.76      O.S6
                     RELATIVE EVENNESS   »<7      0.76      O.SS
      MEAN  NUMBER  OF !NPTVin"ALS/TAXA    L    171.13     80.95
     NUMBER/ML  OF  MOST ABUNDANT  TAXON    K    630.00    706.00
                                      39

-------
LAKE »A«I 8HAOON MTU. LAKE
STORET HUNKER I 0111
TAXA

ANABACIU
ANK1ITRQDESNUS rALCITU*
 ». ACICULARIS
APHAIIItONENOK FLOS-AQUAE
AlTtRIQNILLA rO«MO»«
CHROONONAS T
COINMIUN
CRYPTONCXAO
CRTPTDNONAO NARlSOiH
c*rpToito»4i» IPP.
CKLOTKLLA • ODAMCA
CYOt
OIATONA tCMUt
 V. IbONCITUK
DICtIO»P«««RIU« PULCHCLLUN
DIKOIHIOK »»V»P1CI)»
OINOIRTOI OLINORICUM
           II
           CROfONm*I«
           LCI>tU«Tkb*QN
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-------
                                    TECHNICAL REPORT DATA
                            (Please read Instructions on the reverse before completing)
 1. REPORT NO.
    EPA-600/3-79-114
                                                            3. RECIPIENT'S ACCESSION NO.
4. TITLE AND SUBTITLE

 DISTRIBUTION OF PHYTOPLANKTON IN COLORADO LAKES
             5. REPORT DATE
                 December 1979
                                                            6. PERFORMING ORGANIZATION CODE
V.CTfo'rris,  W.D. Taylor,  L.R.  Williams, S.C.  Hern,
 V.W.  Lambou,  and F.A, Morris
             8. PERFORMING ORGANIZATION FIEPOBT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS  .  .
 Environmental Monitoring  ana Support Laboratory
 Office of Research and  Development
 U.S.  Environmental Protection Agency
 Las Vegas,  NV  89114
              10. PROGRAM ELEMENT NO.
              1BD884
              11. CONTRACT/GRANT NO.
 12. SPONSORING AGENCY NAME AND ADDRESS
 U.S. Environmental T^rorlecTion 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
              02-21-75 to 12-11-75
              14. SPONSORING AGENCY CODE

              EPA/600/07
 5. SUPPLEMENTARY NOTES
 16. ABST
       This is a data  report presenting the  species and abundance of phytoplankton
 in  the IJ lakes sampled  by the National  Eutrophication  Survey in the State of
 Colorada.  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).
                                 KEY WORDS AND DOCUMENT ANALYSIS
                   DESCRIPTORS
b.lDENTIFIERS/OPEN ENDED TERMS
                                                                             COSATI Field/Group
  *aquatic microbiology
   lakes
  *phytoplankton
   water quality
 Colorado
 lake eutrophication
 Nygaard's  trophic indices
 Palmer's organic pollu-
 tion indices
 Species diversity and
 abundance
                            06 C, M
                            08 H
                            13 B
 B. DISTRIBUTION STATEMENT

  RELEASE TO  PUBLIC
19. SECURITY CLASS (This

 UNCLASSIFIED
                            21. NO. OF PAGES
                             48
                                                20. SECURITY CLASS (TTiiipage)
                                                UNCLASSIFIED
                                                                           22. PRICE
 EPA Fo»«n 2220-1 {R,v. 4.77)
                       PREVIOUS EDITION IS OBSOLETE
*U-S.aOVER*IUeKT POINTING OFFICE: 1B7»—683-282/2219

-------