Influence of food web structure on carbon exchange between lakes and the atmosphere

被引：260
作者：
Schindler, DE
Carpenter, SR
Cole, JJ
Kitchell, JF
Pace, ML
机构：
[1] UNIV WISCONSIN,CTR LIMNOL,MADISON,WI 53706
[2] NEW YORK BOT GARDEN,INST ECOSYST STUDIES,MARY FLAGLER CARY ARBORETUM,MILLBROOK,NY 12545
来源：
SCIENCE | 1997年 / 277卷 / 5323期
关键词：
D O I：
10.1126/science.277.5323.248
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Top predators and nutrient loading in lakes were manipulated to assess the influence oi food web structure on carbon flux between lakes and the atmosphere. Nutrient enrichment increased primary production, causing lakes to become net sinks for atmospheric carbon (C-atm). Changes in top predators caused shifts in grazers. At identical nutrient loading, C-atm invasion was greater to a lake with low grazing than to one with high grazing. Carbon stable-isotope distributions corroborated the drawdown of lake carbon dioxide and traced C-atm transfer from algae to top predators Thus, top predators altered ecosystem carbon fixation and linkages to the atmosphere.
引用
收藏
页码：248 / 251
页数：4
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