BIOLOGICAL-CONTROL OF EUTROPHICATION IN LAKES

被引:124
|
作者
CARPENTER, SR
CHRISTENSEN, DL
COLE, JJ
COTTINGHAM, KL
HE, X
HODGSON, JR
KITCHELL, JF
KNIGHT, SE
PACE, ML
POST, DM
SCHINDLER, DE
VOICHICK, N
机构
[1] INST ECOSYST STUDIES,MILLBROOK,NY 12545
[2] NOAA,NATL MARINE FISHERIES SERV,HONOLULU,HI 96822
[3] ST NORBERT COLL,DEPT BIOL,DE PERE,WI 54115
关键词
D O I
10.1021/es00003a028
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Eutrophication of lakes, expressed as excess growth of planktonic algae, is caused by excessive inputs of phosphorus and can be mitigated by many mechanisms, including grazing. However, it has been hypothesized that grazing becomes ineffective with even modest increases in P input. We tested this contention directly by fertilizing lakes that had contrasting food webs. A lake with zooplanktivorous fishes and small grazers accumulated algal biomass as predicted by Vollenweider's model of eutrophication. A lake with piscivorous fishes and large grazers accumulated about half the algal biomass predicted by the model. However, blue-green algae bloomed in both lakes. Grazing may effectively control total algal biomass over a relatively wide range of P input rates, but may not suppress irruptions of nuisance algae.
引用
收藏
页码:784 / 786
页数:3
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