MIXED RESPONSES TO RESOURCE DENSITIES AND THEIR IMPLICATIONS FOR CHARACTER DISPLACEMENT

被引：25

作者：

ABRAMS, PA

机构：

[1] Department of Ecology and Behavioral Biology, University of Minnesota, Minneapolis, 55455, MN

来源：

EVOLUTIONARY ECOLOGY | 1990年 / 4卷 / 02期

关键词：

character displacement; competition; consumer-resource system; frequency dependence; functional response; predation; resource;

D O I：

10.1007/BF02270907

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

How should a consumer of two resource types adapt to changes in their abundances? This paper shows that many different biological circumstances produce mixed responses; i.e. increasing availability of one resource increases the consumer's efforts to obtain it, while increasing availability of the other resource decreases the consumer's efforts at exploitation. This implies that competition from a second consumer species may cause convergent or divergent character displacement of the first species. The signs and magnitudes of the second derivative of the fitness function are important in determining which outcome occurs. The degree of resource limitation of the consumer species also influences the nature of adaptive shifts in resource use. © 1990 Chapman and Hall Ltd.

引用

页码：93 / 102

页数：10

共 24 条

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[6] Abra P.A., Adaptive responses of generalistt herbivores to competition
[7] convergence or divergence, Evol. Ecol., 4, pp. 103-14, (1990)
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[9] Belovsky G.E., Generalist herbivore foraging and its role in competitive interactions, Amer. Zool., 26, pp. 51-70, (1986)
[10] Belovsky G.E., Optimal foraging and community structure: Implications for a guild of generalist grassland herbivores, Oecologia, 70, pp. 35-52, (1986)

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