Effects of nutrient recycling by zooplankton and fish on phytoplankton communities

被引:74
作者
Attayde, JL [1 ]
Hansson, LA [1 ]
机构
[1] Inst Ecol Limnol, S-22362 Lund, Sweden
关键词
nutrient excretion; food chain; algal diversity;
D O I
10.1007/s004420050906
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
In laboratory experiments we tested the hypothesis that nutrients supplied by fish and zooplankton affect the structure and dynamics of phytoplankton communities. As expected from their body size differences, fish released nutrients at lower mass-specific rates than Daphnia. On average, these consumers released nutrients at similar N:P ratios, although the ratios released by Daphnia were more variable than those released by fish. Nutrient supply by both fish and Daphnia reduced species richness and diversity of phytoplankton communities and increased algal biomass and dominance. However, nutrient recycling by fish supported a more diverse phytoplankton community than nutrient recycling by Daphnia. We conclude that nutrient recycling by zooplankton and fish have different effects on phytoplankton community structure due to differences in the quality of nutrients released.
引用
收藏
页码:47 / 54
页数:8
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