WHY DONT PREDATORS HAVE POSITIVE EFFECTS ON PREY POPULATIONS

被引：34

作者：

ABRAMS, PA

机构：

[1] Department of Ecology, Evolution, and Behavior, University of Minnesota, Minneapolis, 55455, MN

来源：

EVOLUTIONARY ECOLOGY | 1992年 / 6卷 / 06期

关键词：

OPTIMAL FORAGING; PREDATION; PREDATOR-PREY INTERACTIONS; MATHEMATICAL MODELS;

D O I：

10.1007/BF02270691

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Three mechanisms by which increasing predation can increase prey population density are discussed: (1) Additional predation on species which have negative effects on the prey; (2) Predation on consumer species whose relationship with their own prey is characterized by a unimodal prey isocline; (3) Predation on species which adaptively balance predation risk and food intake while foraging. Possible reasons are discussed for the rarity of positive effects in previous predator-manipulation studies; these include the short-term nature of experiments, the large magnitudes of predator density manipulation, and various sources of bias in choice of system and interpretation of results.

引用

页码：449 / 457

页数：9

共 24 条

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