Trophic cascades in a formerly cod-dominated ecosystem

被引：897

作者：

Frank, KT

Petrie, B

Choi, JS

Leggett, WC

机构：

[1] Fisheries & Oceans Canada, Bedford Inst Oceanog, Ocean Sci Div, Dartmouth, NS B2Y 4A2, Canada

[2] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada

来源：

SCIENCE | 2005年 / 308卷 / 5728期

关键词：

D O I：

10.1126/science.1113075

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：

Removal of top predators from ecosystems can result in cascading effects through the trophic levels below, completely restructuring the food Web. Cascades have been observed in small-scale or simple food webs, but not in large, complex, open-ocean ecosystems. Using data spanning many decades from a once cod-dominated northwest Atlantic ecosystem, we demonstrate a trophic cascade in a large marine ecosystem. Several cod stocks in other geographic areas have also collapsed without recovery, suggesting the existence of trophic cascades in these systems.

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收藏

页码：1621 / 1623

页数：3

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