Trophic cascades promote threshold-like shifts in pelagic marine ecosystems

被引：311

作者：

Casini, Michele ^{[1
]}

Hjelm, Joakim ^{[1
]}

Molinero, Juan-Carlos ^{[2
]}

Lovgren, Johan ^{[1
]}

Cardinale, Massimiliano ^{[1
]}

Bartolino, Valerio ^{[3
]}

Belgrano, Andrea ^{[1
]}

Kornilovs, Georgs ^{[4
]}

机构：

[1] Swedish Board Fisheries, Inst Marine Res, SE-45321 Lysekil, Sweden

[2] Leibniz Inst Marine Sci IFM GEOMAR, D-24105 Kiel, Germany

[3] Univ Roma La Sapienza, Dept Anim & Human Biol, I-00185 Rome, Italy

[4] Latvian Fish Resources Agcy, LV-1048 Riga, Latvia

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 01期

关键词：

alternative dynamics; ecological thresholds; ecosystem resilience; Baltic Sea; climate versus top-down control; BOTTOM-UP; FISH PRODUCTION; CLIMATE-CHANGE; REGIME SHIFTS; TOP-DOWN; CLUPEA-HARENGUS; BALTIC SEA; SPRAT; COMMUNITIES; RECRUITMENT;

D O I：

10.1073/pnas.0806649105

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：

Fisheries can have a large impact on marine ecosystems, because the effects of removing large predatory fish may cascade down the food web. The implications of these cascading processes on system functioning and resilience remain a source of intense scientific debate. By using field data covering a 30-year period, we show for the Baltic Sea that the underlying mechanisms of trophic cascades produced a shift in ecosystem functioning after the collapse of the top predator cod. We identified an ecological threshold, corresponding to a planktivore abundance of approximate to 17 x 10(10) individuals, that separates 2 ecosystem configurations in which zooplankton dynamics are driven by either hydroclimatic forces or predation pressure. Abundances of the planktivore sprat above the threshold decouple zooplankton dynamics from hydrological circumstances. The current strong regulation by sprat of the feeding resources for larval cod may hinder cod recovery and the return of the ecosystem to a prior state. This calls for the inclusion of a food web perspective in management decisions.

引用

页码：197 / 202

页数：6

共 43 条

[41] Predator disease out-break modulates top-down, bottom-up and climatic effects on herbivore population dynamics [J].

Wilmers, CC ;

Post, E ;

Peterson, RO ;

Vucetich, JA .

ECOLOGY LETTERS, 2006, 9 (04) :383-389

[42] Climate change uncouples trophic interactions in an aquatic ecosystem [J].

Winder, M ;

Schindler, DE .

ECOLOGY, 2004, 85 (08) :2100-2106

[43]

1992, ECOLOGY, V73, P723

← 1 2 3 4 5 →