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Relative Immigration Activity of the Hibernal Diatom Community in Eutrophic Waters  

Yoon, Sung-Ae (Department of Environmental Science, Konkuk University)
Kim, Nan-Young (Department of Environmental Science, Konkuk University)
Kim, Baik-Ho (Department of Environmental Science, Konkuk University)
Hwang, Soon-Jin (Department of Environmental Science, Konkuk University)
Publication Information
Korean Journal of Ecology and Environment / v.41, no.3, 2008 , pp. 311-319 More about this Journal
Abstract
To understand the relative immigration activities (RIA) of hibernal diatom community in Lake Ilgam (at the station with and without macrophyte) and River Han (at the station with different current and nutrient), a natural and artificial bed substrate was deposited from 15 to 29 January 2008. For the study period, both waters comprised huge biomass of diatom, over 75% of total abundance. Nutrients in water column, ash-free dry matter (AFDM) and chlorophyll-a (Chl-a) concentration in substrates were decreased with increasing of current in rivers, while in lakes the macrophyte largely affected the diatom community and water quality. Algal RIA in rivers was high at stations with high concentration of nutrient, AFDM and Chl-a, and in high nutrients and no macrophytes in lakes, respectively. The species showing a higher RIA was Nitzschia amphibia in rivers and Aulacoseira italica in lakes, while the dominant species were Navicula sp. in rivers and Syndera acus in lakes, suggesting no relationship between water algal biomass and its RIA. These results suggest that the RIA of stream diatom community depends exclusively on the current, while the planktonic diatom in lake was of the macrophyte.
Keywords
immigration; hibernal diatom community; artificial substrates; stream; lake; macrophyte;
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Times Cited By KSCI : 1  (Citation Analysis)
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