United States
Environmental Protection
Agency
Environmental Monitoring
and Support Laboratory
P.O Box 15027
Las Vegas NV89114
EPA-600/3-79-066
June 1979
Research and Development
Distribution
Phytoplankton in
Nebraska Lakes
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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 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 to the public through the National Technical Information
Service. Springfield. Virginia 22161
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EPA-600/3-79-066
June 1979
DISTRIBUTION OF PHYTOPLANKTON IN NEBRASKA LAKES
by
F. A. Morris*, M. K. Morris*, W. D. Taylor,
L. R. Williams, S. C. Hern, and V. W. Lambou
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
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.
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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
9 lakes sampled by the National Eutrophication Survey in the State of
Nebraska, 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.
GeorgeyB. organ
Director
Environmental Monitoring and Support Laboratory
Las Vegas
iii
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CONTENTS
Foreword iii
Introduction 1
Materials and Methods 2
Lake and Site Selection 2
Sample Preparation 2
Examination 3
Quality 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 A. Phytoplankton Species list for the State
of Nebraska 11
Appendix B. Summary of Phytoplankton Data 14
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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 1974, the Survey sampled 179 lakes in
10 States. Over 700 algal species and varieties were identified and
enumerated from the 573 water samples examined.
This report presents the species and abundance of phytoplankton in the
9 lakes sampled in the State of Nebraska (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 NEBRASKA
STORET No.
Lake Name
County
3101
3102
3103
3104
3105
3106
3107
3108
3110
Branched Oak
Harlan County Reservoir
Harry D. Strunk
(Medicine Creek)
Hugh Butler (Red Willow)
Johnson Reservoir
Lake McConaughy
Pawnee Lake
Sherman County Reservoir
Swanson Reservoir
Lancaster
Harlan
Frontier
Frontier, Red Willow
Dawson, Gosper
Keith
Lancaster
Sherman
Hitchcock
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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 millilHers (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 superconcentrate from 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
Oligotrophic Eutrophic
Myxophycean
Chlorophycean
Di atom
Euglenophyte
Compound
Myxophyceae
Desmideae
Chlorococcales
Desmideae
Centric Diatoms
Pennate Diatoms
Euglenophyta
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
Chi orel la
Closterium
Cyclotella
Euglena
Gomphonema
Lepocinclis
Melosira
Micractim'um
Navicula
Nitzschia
Oscillatoria
Pandorina
Phacus
Phormidium
Scenedesmus
Stigeoc 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
Ankistrodesmus falcatus
Arthrospira ienneri
Chlorella vulgaris
C^clotella meneghiniana
Euglena jjracilis
Euglena viridis
Gomphonema parvulum
Melosira varians
Navicula cryptocephala
Nitzschia acicularis
Nitzschia galea
Oscillatoria chlorina
Oscillatoria limosa
OsciTlatoria princeps
Oscillatoria putrida
Oscillatoria tenuis
Pandorina morum
Scenedesmus quadricauda
Stigeoc Ionium 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 Brill ouin (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):
S
H = -L P, logx PI
where P is the proportion of the ith taxon in the sample, which is calculated
from ni/N; nn- 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
iSSnJffS eii(alue' Even though considerable effort was made to find and
rare DhvtSll.iB^ t>e Vel Samp1es undoubtedly contain a fair number of
rare pnytoplankton 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 all
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 = -
Jbl loq 1 - N - (S-1)
N 92 N N
log9
N - (S-1
N
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:
RJ =
H-MinH
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
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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 ?:urh 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. In: 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 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 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 NEBRASKA
11
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Aohnanth&s sp.
Aatinastnan hantzsahii
v. fluviatile
Anabaena sp.
Ankistrodesmus faloatus
Ankistrodesmus falcatus
v. aoioularis
Ankistrodesmus faloatus
v. mirabi Us
Aphanizomenon flos-aquae
Asterionella formosa
Caloneis lewisii
Carteria klebsii
Ceratium hirundinella
Ceratium hirundinella
f. fureoides
Ceratium hirundinella
f. soottioum
Chlamydomonas sp.
Chlorogonium sp.
Closteriwn sp.
Coaeoneis placentula
Coelastrwn cambrioum
Coelastmon eambriaum
v. intermedium
Coelastrwn retioulatum
Coelosphaerium naegelianum
Cosmariim sp.
Crucigenia apieulata
Cruaigenia rectangularis ?
Crucigenia tetrapedia
Cryptomonas erosa
Cryptomonas erosa
v. reflexa
Cryptomonas marssonii
Cryptamonas ovata
Cryptomonas reflexa
Cyolotella meneghLniana
Cyolotella stelligera
Cymatopleura elliptioa
f. spiralis
Cymatopleura solea
Cyrribella affinis
Cymbella tumida
Cymbella turgida
Daotyloooocopsis irregularis
Dentiaula sp.
Diatoma elongation
Diatoma vulgare
Diotyosphaerium puloheIlum
Dinobryon divergens
Vinobyron sooiale
v. amerieanwr,
Elakotothrix sp.
Epithemia sp.
Errerella bornhemiensis
Eudorina elegans
Euglena sp.
Fragilaria aapuaina
Fr-agilcafia oonstruens ?
Fragilaria orotonensis
Fragilaria intermedia ?
Fragilaria leptostauron
Franaeia sp.
Glenodiniim gymnodiniwn
Glenodinium gijrnnodiniim
v. biscutelliforme
Glenodinium oaulatum
Gloeoaystis ampla ?
Gomphonema olivaaeum
Gymnodiniwn albulum
Gyrnnodinium ordinatum
Gyrosigma sp.
Hantzschia amphioxys
f. capitata
Kirahneriella sp.
Lagerheimia quadriseta
Lepocinclis sp.
Lyngbya sp.
Mallomonas caudata
Melosira distans
Melosira granulata
Melosira granulata
v. angustissima
Melosira italiea
Melosira varians
Merismopedia minima
Merismopedia tenuissima
Mesostigma viridis
Micractinium pusillum
Microcystis aeruginosa
Microcystis inoerta
Mougeotia sp.
Navicula la tens ?
Naviaula radiosa
Neidium ? sp.
Nitzschia filiformis
Nitzsehia palea
Nitzschia sigmoidea
Oooystis sp.
12
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Ophiooytium oapitatum
Osoillatoria limnetioa
Osoillatoria tennis
Pandorina morwn
Pandorina protubevans
Pediastrum boryanum
Pediastrum duplex
Pediastrim duplex
v. olathratum
Pediastrum duplex
v. retioulatim
Pediastrim duplex
v. rotunda turn
Pediastrum simplex
v. duodenarium
Pediastrum tetras
Pediastrum tetras
v. tetraodon
Pevidinium inaonspiauum
Phaaus aouminatus
Phaaus longiaauda
Phacus megalopsis
Pinnularia sp.
Raphidiopsis ourvata
Khoieosphenia sp.
Rhopalodia gibba
Scenedesmus abundans
Saenedesmus aouminatus
Soenedesmus arouatus
Scenedesmus balatoniaus ?
Soenedesmus biaaudatus
Soenedesmus bijuga
Soenedesmus bijuga
v. flexuosus
Soenedesmus dimorphus
Soenedesmus intermedius
Soenedesmus obliquus
Soenedesmus opoliensis
Soenedesmus protuberans
Soenedesmus quadrioauda
Soenedesmus raoiborskii
f. aranulatas
Sohroederia setigera
Sphaerocystis schroeteri
Staurastrum ohaetooerus
Stephanodisous astraea
Stephanodisous niagarae
Surirella angustata
Surireila ovata
Synedra aous
S;medra rumpens
Synedra ulna
Tetraedron oaudatum
Tetraedron oaudatum
v. longeoornutum
Tetraedron hastatum
Tetraedron minimum
Tetraedron mutioum
Tetraedron trigonum
v. graoile
Tetrastrum ? gldbrum
Tetrastrum elegans
Tetrastrum heteraoanthwn
Tetrastrum staurogeniaeforme
Traohelomonas abrupta ?
Traahelomonas ensifera
Traahelomonas fluviatilis
Traahelomonas intermedia
Traohelomonas planotonioa
Traahelomonas sohauinslandii
Traohelomonas verruoosa
Traohelomonas volvooina
Wislouohiella sp.
13
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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, EUMOTIA #1, 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.
ERRATA
Minimum and evenness are misspelled in the computer printout of the
species diversity and abundance indices data.
14
-------
LAKt NAME: BRANCHED OAK
STORET NUMBER: 3101
NYbAAkD TROPHIC STATE INDICES
DATE 0<. 17 7 .26 "7*
GENUS
SPECIES
03
C3
03
1C
D2
SPECIES DIVERSITY AND ABUNDANCE INDICES
LATE 0* 17 7* 07 02 7<. 09 26 T>
AV[f:aOE MVEKS1TY H 1.3«t
M.'NetK OF TAXA S 23. Cu
NUMBER OF SAMPLES COMPOiJTEO M 3.00
' MAXIMUM DIVERSITY HAXH «t.52
MNUNUrt DIVERSITY HINH C.C2
0 27333.32
N .20398.00
J 0.3'J
RJ 0.30
L 686.67
K 15728.CO
D1VER51IY
TOTAL NUMbER OF INU1V 1DUAIS/HL
EVENESS CUSPDNINT
RELATIVE EVENfSS
MEAN NUMBER UF iNU1V1 DUALS/TAXA
NUMEtR/Ml OF SOST A&UNCANT TAXON
2.93
30.00
3. CO
0.1C
11605.73
3961.00
132.03
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26A1.00
15
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IAKE WARE: MARIAN
STURET NUMBERS 3102
NYGAAkD TROPHIC STATE INDICES
HATE L'<. 16 7*i 06 2ft 7". ut 3C 7
25.00
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LAKE MADE: SUflNSCM
STOfitT NUMBER: 3110
NYGAAkC IKUPH1C STATE INDICES
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-------
TECHNICAL REPORT DATA
(Please read Instructions on the reverse before completing) t
1. REPORTNO. 2
EPA-600/3-79-066
4. TITLE ANDSU8TITLE
DISTRIBUTION OF PHYTOPLANKTON IN NEBRASKA LAKES
7. AUTHOH(S)
F.A. Morris, M.K. Morris, W.D. Taylor, L.R. Williams,
S.C. Hern, V.W. Lambou
9. PERFORMING ORGANIZATION NAME AND ADDRESS
Environmental Monitoring and Support Laboratory
Office of Research and Development
J.S. Environmental Protection Agency
Las Vegas, NV 89114
12. SPONSORING AGENCV NAME AND ADDRESS
U.S. Environmental Protection Agency-Las Vegas, NV
)ffice of Research and Development
Environmental Monitoring and Support Laboratory
Las Vegas, NV 89114
3. RECIPIENT'S ACCESSION NO.
5. REPORT DATE
June 1979
6. PERFORMING ORGANIZATION CODE 1
8. PERFORMING ORGANIZATION REPORT NO. 1
10. PROGRAM ELEMENT NO.
1BD884 I
1. CONTRACT/GRANT NO.
13. TYPE OF REPORT AND PERIOD COVERED I
03-15-74 to 11-20-74
14. SPONSORING AGENCY CODE 1
EPA/600/07
15. SUPPLEMENTARY NOTES I
16. ABSTRACT
This is a data report presenting the species and abundance of phytoplankton
in the 9 lakes sampled by the National Eutrophication Survey in the State of
Nebraska. 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
a. DESCRIPTORS
*aquat1c microbiology
lakes
*phytoplankton
water quality
18. DISTRIBUTION STATEMENT
RELEASE TO PUBLIC
b. IDENTIFIERS/OPEN ENDED TERMS
Nebraska
lake eutrophication
Nygaard's trophic indices
Balmer's organic pollu-
tion indices
Species diversity and
abundance indices
19. SECURITY CLASS (This Report)
UNCLASSIFIED
20. SECURITY CLASS (This page/
UNCLASSIFIED
c. COSATI Field/Group ]
06 C, M
08 H
13 B
21. NO. OF PAGES
40
22. PRICE
A03
EPA form 2220-1 (R»v. 4-77) PREVIOUS EDITION is OBSOLETE
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