Factors that regulate the zooplankton community structure of a turbid, hypereutrophic Great Lakes wetland

We sampled zooplankton from mid-May to early September over 2 years to study the spatial and seasonal distribution of animals in a large urban wetland of Lake Ontario. Samples were from several habitat types including open water, vegetated areas, fast-flow areas, and a sewage lagoon. Mean seasonal densities ranged from 17 individuals/L (5 µg/L) in fast-flow areas to 1800 individuals/L (1100 µg/L) in low-flow, highly vegetated areas. All of our sites were dominated by herbivorous rotifers (e.g., Brachionus sp., Polyarthra sp., Keratella sp.), small herbivorous cladocerans (Bosmina longirostris; mean length <300 µm), cyclopoid nauplii, and medium-sized cladocerans (e.g., Moina micrura; mean length 300-600 µm), which were absent from the most eutrophic sites. The high levels of inorganic suspended solids in the marsh appeared to select against large filter feeders such asDaphnia and allowed smaller zooplankton to dominate. Multivariate analyses indicated that the zooplankton distribution was related to flow rate, extent of macrophyte cover, and level of site degradation. If the forthcoming carp (Cyprinus carpio) exclusion from Cootes Paradise Marsh results in increased macrophyte growth, we predict that zooplankton biomass will increase and that the zooplankton community may shift to larger forms.

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Impact of habitat heterogeneity on the biodiversity and density of the zooplankton community in shallow wetlands (Upo wetlands, South Korea)

Oceanological and Hydrobiological Studies ◽

10.1515/ohs-2016-0041 ◽

2016 ◽

Vol 45 (4) ◽

Cited By ~ 6

Author(s):

Jong-Yun Choi ◽

Kwang-Seuk Jeong ◽

Seong-Ki Kim ◽

Gea-Jae Joo

Keyword(s):

South Korea ◽

Zooplankton Community ◽

Open Water ◽

Structural Heterogeneity ◽

Taxonomic Composition ◽

Zooplankton Biomass ◽

Freshwater Ecosystems ◽

Habitat Types ◽

Vegetation Zone ◽

Zooplankton Density

AbstractMacrophytes play a major role in the structuring of aquatic environments, and create diverse microhabitats. Therefore, these plants represent an important factor regulating the zooplankton biomass, taxonomic composition, and distribution in freshwater ecosystems. In the current study, we examined the effects of the structural heterogeneity provided by various macrophytes. We identified four habitat types in this study: (1) open water (without macrophytes), (2) the helophyte zone, (3) the pleustophyte zone, and (4) the mixed vegetation zone (containing pleustophytes, nymphaeids, and elodeids). We tested the hypothesis that complex habitat structures support large zooplankton assemblages. Specifically, we collected zooplankton samples from a total of 119 sampling points in the Upo Wetlands, South Korea, during the spring and autumn of 2009. The largest zooplankton assemblage was found in the mixed macrophyte zone, followed by the helophyte and pleustophyte zones. The pleustophyte zone supported larger zooplankton assemblages during autumn compared to spring. Differences in zooplankton assemblages were considered to be strongly related to seasonal variation in the development and growth of pleustophytes. However, two-way ANOVA revealed that seasons had no significant influence on the zooplankton density and diversity. Instead, different habitat types substantially determined zooplankton characteristics. In conclusion, we demonstrated that wetland areas with high macrophyte species diversity contribute toward higher zooplankton diversity.

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Zooplankton Community Structure in Hardwater Hypertrophic Lakes of Alberta

Water Science & Technology ◽

10.2166/wst.1993.0570 ◽

1993 ◽

Vol 27 (7-8) ◽

pp. 353-361 ◽

Cited By ~ 5

Author(s):

B. Pinel-Alloul

Keyword(s):

Phosphorus Content ◽

Size Structure ◽

Zooplankton Community ◽

Zooplankton Biomass ◽

Western Canada ◽

Zooplankton Abundance ◽

Lime Treatment ◽

Eutrophic Lakes ◽

Size Spectra ◽

Zooplankton Community Structure

Excessive concentrations of phosphorus are a common feature of hardwater eutrophic lakes in western Canada. Preliminary experimental lime treatment showed that this approach had a great potential to reduce phosphorus content and algal biomass. Therefore, two pairs of experimental and reference lakes were selected for a whole lake lime treatment and monitored for a full year prior to manipulation. This study presents the composition and size structure of the Zooplankton community of the lakes before treatment in order to assess the natural summer and inter-lake variations. Before lime treatment, seasonal means of total Zooplankton abundance and biomass ranged from 17 ± 8 to 127 ± 84 ind. L−1 and from 4 ± 2 to 138 ± 236 mg m−3, respectively. The two experimental lakes (Halftnoon and Lofty) were the richest in Zooplankton while the references lakes (Crooked and Jenkins) were the poorest. A total of 30 Zooplankton species (17 rotifers, 2 calanoids, 4 cyclopoids and 7 cladocerans) were recorded as well as 3 chaoborid species. The composition and size structure of Zooplankton varied between lakes and dates. Rotifers accounted for the majority of Zooplankton abundances (59-91%) while Cladocera (78-99%) or Copepoda (74%) in Crooked lake formed most of the Zooplankton biomass. Summer variations of the Zooplankton groups were described along with changes in size spectra. The temporal variation and the inter-lake differences in Zooplankton structure were discussed in relation to trophy, fish and invertebrate predation, and cyanophyte interactions.

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Water Physicochemistry and Zooplankton Fauna of Aiba Reservoir Headwater Streams, Iwo, Nigeria

Journal of Ecosystems ◽

10.1155/2014/105405 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Emmanuel O. Akindele ◽

Godwin O. Olutona

Keyword(s):

Habitat Structure ◽

Suspended Solids ◽

Hydrological Cycle ◽

Zooplankton Community ◽

Total Suspended Solids ◽

Inland Waters ◽

Zooplankton Species ◽

Zooplankton Community Structure ◽

Correlation And Regression Analysis ◽

Freshwater System

The physicochemical water condition and zooplankton fauna of the two main inflows of Aiba Reservoir were assessed over an annual hydrological cycle (May 2013–March 2014). The concentrations of total solids (TS) and total suspended solids (TSS) in the two streams were unusually higher in the dry season for typical inland waters of Nigeria and showed a decrease from the upper reaches towards the lower reaches (reservoir’s inlet). Dissolved oxygen, NO3-, and PO43- recorded their highest concentrations at the reservoir’s inlet. A total of 37 species of zooplankton were recorded in the study, comprising 5 species of Protozoa, 14 species of Rotifera, 10 species of Copepoda, 4 species of Ostracoda, and 4 species of Insecta. Aiba stream recorded higher number of zooplankton species and abundance than Onikan stream. While number of zooplankton species and abundance showed an increase from the upper reaches to the lower reaches of both streams, species diversity and equitability generally showed a decrease. Correlation and regression analysis suggests that the concentration of TS and TSS played a major role in determining the zooplankton community structure of the streams. PO43- concentrations as well as the community structures of zooplankton faunas of the two streams were indicative of a polluted freshwater system with unstable habitat structure.

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Impact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guinea

ICES Journal of Marine Science ◽

10.1093/icesjms/fsn042 ◽

2008 ◽

Vol 65 (3) ◽

pp. 318-324 ◽

Cited By ~ 31

Author(s):

George Wiafe ◽

Hawa B. Yaqub ◽

Martin A. Mensah ◽

Christopher L. J. Frid

Keyword(s):

Climate Change ◽

Climatic Factors ◽

Southern Oscillation ◽

Global Climate ◽

Zooplankton Community ◽

Zooplankton Biomass ◽

Gulf Of Guinea ◽

Zooplankton Community Structure ◽

Impact Of Climate Change

Abstract Wiafe, G., Yaqub, H. B., Mensah, M. A., and Frid, C. L. J. 2008. Impact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guinea. – ICES Journal of Marine Science, 65: 318–324. We investigated long-term changes in coastal zooplankton in the upwelling region in the Gulf of Guinea, 1969–1992, in relation to climatic and biotic factors. We considered the role of hydrographic and climatic factors, i.e. sea surface temperature (SST), salinity, sea level pressure, windfield, and Southern Oscillation Index (SOI), in the long-term variation of zooplankton in a multiple regression analysis, along with the abundance of Sardinella. Annual variation in zooplankton biomass was cyclical, with the annual peak occurring during the major upwelling season, July–September. Over the 24-year period, there was a downward trend in zooplankton biomass (equivalent to 6.33 ml per 1000 m3 per year). The decomposed trend in SST during the major upwelling revealed gradual warming of surface waters. This trend was believed to be the main influence on the abundance of the large copepod Calanoides carinatus (sensitive to temperatures above 23°C), which appears in the coastal waters only during the major upwelling season. The warming trend associated with global climate change could affect zooplankton community structure, especially during the major upwelling season. Global warming coupled with “top–down” (predation) control by Sardinella might be responsible for the long-term decline in zooplankton biomass in the upwelling region of the Gulf of Guinea.

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Variations in zooplankton community structure and water quality conditions in three habitat types in northern Lake Victoria

Lakes & Reservoirs Research & Management ◽

10.1111/j.1440-1770.2012.00504.x ◽

2012 ◽

Vol 17 (2) ◽

pp. 83-95 ◽

Cited By ~ 5

Author(s):

Kiggundu Vincent ◽

L. Mwebaza-Ndawula ◽

B. Makanga ◽

Sarah Nachuha

Keyword(s):

Water Quality ◽

Community Structure ◽

Lake Victoria ◽

Zooplankton Community ◽

Habitat Types ◽

Zooplankton Community Structure

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Zooplankton Community Structure, but not Biomass, Influences the Phosphorus–Chlorophyll a Relationship

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f84-128 ◽

1984 ◽

Vol 41 (7) ◽

pp. 1089-1096 ◽

Cited By ~ 103

Author(s):

Michael L. Pace

Keyword(s):

Community Structure ◽

Body Size ◽

Chlorophyll A ◽

Zooplankton Community ◽

Zooplankton Biomass ◽

Similar Data ◽

Data Set ◽

Zooplankton Community Structure ◽

Chl A ◽

Residual Variation

Simultaneous observations were made of total phosphorus (TP), chlorophyll a (Chl a), and zooplankton biomass and community structure at 12 sites in the Eastern Townships (ET) region of Quebec to determine if zooplankton parameters reduced residual variation in the TP–Chl a relationship. Similar data from three stations in Lake Memphremagog and the literature were also analyzed. Zooplankton biomass was not significant in explaining residual variation in the TP–Chl a relationship of any data set studied. The mean body size of cladocerans was also not a significant additional variable in a TP–Chl a model based on the seasonal mean values in the ET lakes, but cladoceran body size was a significant factor in 13 lakes of the Indian River district of New York. The difference between these results is attributed to the rarity of large daphnids in the ET lakes. An index of zooplankton community structure derived from the slope of log abundance–log weight regressions was significant in explaining residual variation in TP–Chl a relationships for the among- and within-lake data and improved the predictive capability of TP–Chl a models. Lakes with higher concentrations of macrozooplankton relative to microzooplankton have less Chl a per unit TP. These results extend the generality of the hypothesis that large zooplankton differentially reduce Chl a relative to TP. In the ET lakes the effect of zooplankton size structure, however, was weak and this suggests that manipulation of zooplankton community structure to manage algal biomass may be of limited value in many lakes.

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KARAKTERISTIK FISIKA KIMIA PERAIRAN DAN STRUKTUR KOMUNITAS ZOOPLANKTON DI ESTUARI SUNGAI BANYUASIN, SUMATERA SELATAN

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.3.3.2010.149-157 ◽

2017 ◽

Vol 3 (3) ◽

pp. 149 ◽

Cited By ~ 1

Author(s):

Eko Prianto ◽

Husnah Husnah ◽

Solekha Aprianti

Keyword(s):

Water Quality ◽

Species Diversity ◽

Water Samples ◽

Government Regulation ◽

Suspended Solids ◽

Zooplankton Community ◽

Total Suspended Solids ◽

Zooplankton Abundance ◽

Zooplankton Community Structure ◽

Water Sampler

Penelitian ini bertujuan untuk mengetahui kondisi kualitas perairan pasca pembangunan Pelabuhan Tanjung Api-Api dengan mempelajari karakteristik fisika kimia perairan dan struktur komunitas zooplankton. Penelitian tentang kelimpahan dan keanekaragaman jenis zooplankton dilakukan melalui enam titik stasiun pengamatan di muara Sungai Banyuasin pada bulan April sampai Nopember 2009. Contoh air diambil pada kedalaman 1 m dari permukaan air dengan menggunakan kemmerer water sampler dan contoh zooplankton diambil dengan menggunakan ember 50 L pada permukaan perairan. Selanjutnya contoh air disaring dengan menggunakan planktonnet dengan ukuran 25 μm. Hasil analisis kualitas air diperoleh nilai parameter (suhu, pH, NO2, COD, BOD, dan DO) berada dalam ambang batas yang diperbolehkan sesuai dengan Peraturan Pemerintah No.82 Tahun 2001. Nilai parameter padatan tersuspensi (total suspended solids), total dissolvedsolid, amoniak, nitrat, dan fosfat telah melebihi ambang batas lingkungan perairan yang diperbolehkan. Nilai indeks mutu lingkungan perairan menunjukan dalam kondisi tercemar berat. Kelimpahan zooplankton pada tahun 2009 yaitu 2-19 ind/L lebih rendah dari kelimpahan pada tahun 2004 yaitu 5- 34 ind/L sedangkan keanekaragaman jenis pada tahun 2009 mengalami penurunan jika dibandingkan tahun 2004. The aims of this study were to determine water quality conditions after construction of the port of Tanjung Api-Api by studying the physico chemical characteristics of water and zooplankton community structure. Research on zooplankton abundance and species diversity through the six points of observation stations in the estuary of the river Banyuasin in April until November 2009. Water samples taken at a depth of 1 m from water surface water by using a kemmerer water sampler and zooplankton samples were taken by using a bucket about 50 L in the surface. Further water samples were filtered using a plankton net with a size 25 μm. The results of water quality analize obtained that parameter values (temperature, pH, NO2, COD, BOD, and DO) were still in the threshold limit, in accordance with Government Regulation No.82 2001. Value parameters of total suspended solids, total dissolved solid, ammonia, nitrate, and phosphate has exceeded the permissible limit aquatic environment. Value of water environmental quality index showed in heavily polluted conditions. Zooplankton abundance in was 2-19 ind/L lower than the abundance in 2004 of 5-34 ind/L, while species diversity in the year 2009 decreased compared to 2004.

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