Fear of Predation Slows Plant-Litter Decomposition

被引：185

作者：

Hawlena, Dror ^{[1
,2
]}

Strickland, Michael S. ^{[1
,3
]}

Bradford, Mark A. ^{[1
]}

Schmitz, Oswald J. ^{[1
]}

机构：

[1] Yale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511 USA

[2] Hebrew Univ Jerusalem, Alexander Silberman Inst Life Sci, Dept Ecol Evolut & Behav, IL-91904 Jerusalem, Israel

[3] Virginia Polytech Inst & State Univ, Dept Biol Sci, Blacksburg, VA 24061 USA

来源：

SCIENCE | 2012年 / 336卷 / 6087期

关键词：

ECOSYSTEM; STRESS; CARBON; SOIL; BIODIVERSITY; RISK;

D O I：

10.1126/science.1220097

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：

Aboveground consumers are believed to affect ecosystem functioning by regulating the quantity and quality of plant litter entering the soil. We uncovered a pathway whereby terrestrial predators regulate ecosystem processes via indirect control over soil community function. Grasshopper herbivores stressed by spider predators have a higher body carbon-to-nitrogen ratio than do grasshoppers raised without spiders. This change in elemental content does not slow grasshopper decomposition but perturbs belowground community function, decelerating the subsequent decomposition of plant litter. This legacy effect of predation on soil community function appears to be regulated by the amount of herbivore protein entering the soil.

引用

页码：1434 / 1438

页数：6

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