EVOLUTIONARY CHANGES OF ECOLOGICAL TRAITS OF BACTERIAL-POPULATIONS THROUGH PREDATOR-MEDIATED COMPETITION .2. THEORETICAL CONSIDERATIONS

被引：7

作者：

NAKAJIMA, T ^{[1
]}

KURIHARA, Y ^{[1
]}

机构：

[1] TOHOKU UNIV, INST BIOL, DEPT SCI, AOBA KU, SENDAI, MIYAGI 980, JAPAN

来源：

OIKOS | 1994年 / 71卷 / 01期

关键词：

D O I：

10.2307/3546169

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

A causal mechanism of replacement of variants in a prey population through predator-mediated competition was investigated using a mathematical model, and experimental results obtained in an accompanying paper were explained. The model shows that an increase in intrinsic growth rate and/or a decrease in predation rate of prey can increase predator equilibrium density, at least under some conditions, which in turn causes negative growth rate of previous types of prey. It is also indicated that the predator's responses in density due to changes of the prey traits can be affected by trade-offs between two parameters of the prey, intrinsic growth rate and predation rate. These mathematical results can explain qualitative aspects of the experimental results.

引用

页码：35 / 39

页数：5