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Is zooplankton an indicator of the water trophic level in dam reservoirs?

Pociecha A., Bielańska-Grajner I., Kuciel H., Wojtal A. Z.

Oceanological and Hydrobiological Studies

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2018

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Vol. 47, No. 3

28--295

EN

The trophic state of ten dam reservoirs was assessed using a zooplankton community. In order to determine the trophic state of dam reservoirs, we used indices calculated on the basis of density and species structure of Rotifera and Crustacea communities. Samples were collected once during summer 2012 in ten dam reservoirs. The largest numbers of zooplankton taxa were found in a lowland high meso-eutrophic dam reservoir (Koronowski) and the lowest ones in a submontane low eutrophic dam reservoir (Lubachowski). The trophic state was determined for the investigated dam reservoirs. In the case of the Rotifera community, the percentage of the tecta form in the Keratella cochlearis population and the proportion of high-trophic species in the total species density were the best indices to describe the water trophic status. In the case of the crustacean community, the best indices were the density of Crustacea and the biomass of Cyclopoida. The high value of all indices calculated on the basis of density and species structure of Rotifera and Crustacea was determined for Zygmunt August Lake, whose trophic status was defined as highly eutrophic to polytrophic. Our study has shown that zooplankton could be a good ecosystem indicator of the water trophic level in dam reservoirs.

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Biodiversity of rotifers in urban water reservoirs of Southern Poland

Pociecha A., Wilk-Woźniak E., Mróz W., Bielańska-Grajner I., Gadzinowska J., Walusiak E.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 3

335--342

EN

Rotifer diversity was studied in three different types of artificial water bodies situated in one of the largest cities in Poland. The bodies of water were as follows: a fountain in a city park, the Nowa Huta dam reservoir, and the Bagry gravelpit. The lowest number of rotifer species (23) was noted in the urban fountain, and the highest (36) in the Bagry gravel-pit lake. Rotifers’ communities in the investigated water reservoirs showed different levels of diversity and density. The most numerous species in the dam reservoir was Trichocerca similis (2511 ind. l-1) and in the Bagry gravel-pit lake was Polyarthra dolichoptera (2634 ind. l-1). However, the most abundant species in the fountain was Brachionus urceolaris (863 ind. l-1). The highest values of Shannon and evenness diversity indices were found in the Bagry gravel-pit lake (H’ = 2.521, J’ = 0.783), while the lowest in the urban fountain (H’ = 0.568, J’ = 0.258). The DCA analysis (Detrended Correspondence Analysis) showed that the diversity of rotifers communities in the studied reservoirs was related to the concentration of magnesium and calcium, and to water conductivity.

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The biodiversity of psammon rotifers in Włocławek Reservoir

Bielańska-Grajner I., Poznańska M.

Oceanological and Hydrobiological Studies

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2010

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Vol. 39, No.1

111-117

EN

In total 47 rotifer taxa were found in the psammon of Włocławek Reservoir; 36 at the site in Dobiegniewo and 38 at Dobrzyń. Five species were classified as psammobionts, 14 as psammophiles, and the remaining ones as psammoxens. Psammobionts and psammophiles were observed mostly in the psammon at Dobiegniewo. The highest density of psammon rotifers was noted in the euarenal zone of the flooded part of the reservoir. However, the highest density in the area near the swift current was noted in the hygroarenal zone. While the flooded part of the reservoir had four dominant species of rotifer: Lecane closterocerca, L. scutata, Lepadella patella and Cephalodella catellina, the area near the swift current had only two: Cephalodella catellina and Brachionus quadridentatus. The most favorable conditions for the development of psammon rotifers was in the flooded area of the reservoir. In comparison with other dam-reservoirs in Poland, the community of these rotifer types in the Włocławek Reservoir was characterized by considerable species richness.

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Preliminary investigations of psammon rotifers in two reservoirs in Upper Silesia

Bielańska-Grajner I.

Oceanological and Hydrobiological Studies

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2004

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Vol. 33, No. 1

37--45

EN

Psammon rotifers were investigated in two lakes of different trophy and degrees of pollution. The Pławniowice Duże Reservoir is mesotrophic, while the Dzierżno Duże Reservoir is highly eutrophic and polluted. Samples were collected from three zones on sandy beaches - one meter above the shoreline (eupsammon), at the shoreline (hygropsammon) and below the water level (hydropsammon). A larger number of rotifer species (28) was detected in the Pławniowice Duże Reservoir than in the Dzierżno Duże Reservoir (18). The species structure of the rotifer communities differed in the two reservoirs. While the density of eupsammic rotifers observed in both reservoirs was high, significant differences were noted in the abundance of them. The dominant species were Cephalodella gibba, Cephalodella catellina and Lecane closterocerca.

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Wrotki (Rotifera) planktonowe w zapadlisku na rzece Łąkawce (Bojszowy - Jedlina)

Bielańska-Grajner I., Niesler A.

Archiwum Ochrony Środowiska

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2002

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Vol. 28, no. 4

81-88

PL

W okresie od marca do listopada 2000 roku badano wrotki planktonowe w zapadlisku Bojszowy -Jedlina. Stwierdzono bogatą faunę Rotifera w tym zbiorniku. Wśród 71 taksonów występował nowy dla Górnego Śląska gatunek Erignatha clastopis (Gosse). Skład jakościowy zgrupowania wrotków w tym zapadlisku różnił się od składu wrotków w innych badanych zapadliskach. Struktura dominacji i stałości zgrupowania wskazywała na zrównoważony charakter pomimo oznak wysokiej trofii.

EN

From March to November 2000 planctonic Rotifera of the collapse pond Bojszowy - Jedlina were studied. Rich fauna of Rotifera (71 taxons) was recorded. One new for Silesia Region species Erignatfia clas-topis (Gosse) was found. The qualitative composition of the Rotifera community in that pond differed from other investigated collapse ponds. In spite of high eutrophy domination and constance structure indicated staid character of the Rotifera community in the Bojszowy - Jedlina pond.