Abundance and Seasonal Trend of Dominant Chironomid Adults and Horizontal Distribution of Larvae in Eutrophic Lake Suwa, Japan.

1998 ◽  
Vol 59 (4) ◽  
pp. 443-455 ◽  
Author(s):  
Ryoji NAKAZATO ◽  
Kimio HIRABAYASHI ◽  
Tokio OKINO
Keyword(s):  
Eutrophic Lake ◽  
Horizontal Distribution ◽  
Seasonal Trend ◽  
Lake Suwa

Changes in ecosystem structure associated with the restoration of water quality in the shallow eutrophic Lake Suwa, Japan

2009 ◽  
Vol 30 (7) ◽  
pp. 1085-1087 ◽  
Author(s):  
Takayuki Hanazato ◽  
Takamaru Nagata ◽  
Masataka Sakuma ◽  
Ho-Dong Park ◽  
Kimio Hirabayashi ◽  
...  
Keyword(s):  
Water Quality ◽  
Eutrophic Lake ◽  
Ecosystem Structure ◽  
Lake Suwa ◽  
Shallow Eutrophic Lake

scholarly journals Horizontal Distribution of Psammonic Ciliates in Two Lakes of Different Trophic Status: Relationship to Physical and Chemical Parameters

2012 ◽  
Vol 38 (2) ◽  
pp. 55-70
Author(s):  
Tomasz Mieczan ◽  
Dorota Nawrot
Keyword(s):  
Trophic Status ◽  
Eutrophic Lake ◽  
Horizontal Distribution ◽  
Chemical Parameters ◽  
Eutrophic Lakes ◽  
Water Parameters ◽  
Mesotrophic Lake ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
Chemical Water

Horizontal Distribution of Psammonic Ciliates in Two Lakes of Different Trophic Status: Relationship to Physical and Chemical ParametersThe aims of this study were to identify the taxonomic diversity and abundance of psammonic ciliate communities in mesotrophic and eutrophic lakes (Łęczna-Włodawa Lakeland, eastern Poland). The effect of selected physical and chemical water parameters on ciliates community was also analysed. Psammon samples were collected during three seasons: spring, summer and autumn of 2010. In each lake, in the psammolittoral, samples were collected in the euarenal, higroarenal, and hydroarenal zones. A total of 53 ciliate taxa were recorded. The highest value of the Shannon-Weaver index was recorded in summer in eutrophic lake (2.79). At the same time in mesotrophic lake, a lower value of the index was determined (0.79). The mean numbers of ciliates ranged from 516 ind.cm-3in the eutrophic lake to 191 ind. cm-3in the mesotrophic lake. In eutrophic lake, the highest number of ciliates was recorded in the euarenal (649 ind. cm-3), and the lowest in the higroarenal (425 ind. cm-3). In the mesotrophic lake, the highest average numbers were determined in the higroarenal (235 ind. cm-3), and the lowest in the hydroarenal (155 ind. cm-3). Irrespective of the lake trophy, Hymenostomata (Paramecium sp., Glaucoma sp., Uronema nigricans) occurred in the highest numbers (from 13 to 95%). The results demonstrated that N-NH4, P-PO4and TOC can strongly regulate the abundance and taxonomic composition of ciliates. The strongest correlations between numbers of ciliates and physical and chemical water parameters were observed in the higro- and hydroarenal zones of the eutrophic lake.

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