Dynamics of Phytoplankton Community in Nutrient Enriched Enclosures and Effects of Experimental Manipulation of Zooplankton.
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概要
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Experimental studies using four enclosures each containing pond waters of 2.9 m<SUP>3</SUP> in volume were performed to analyse the effects of nutrients and zooplankton on succession of the phytoplankton community. Nutrient enrichment at the beginning of the experiment produced marked increases in chlorophyll-a concentration and algal cell density, followed by a sharp decrease in algal abundance in the later half of the experiment. Three patterns of algal population growth (Types I, II and III) were observed under a regime of decreasing nutrient concentrations. Population development of Simocephalus vetulus (cladocera), which were added to the enclosures accelerated declines in the algae of Types I and II. Species-specific differences in algal nutrient utilization efficiency and a considerable decrease in nutrient concentrations caused by phytoplankton growth were major factors in determining successional changes in phytoklankton of the three growth types.
- 日本陸水学会の論文
日本陸水学会 | 論文
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