THE INTENSITY OF INTERFERENCE VARIES WITH RESOURCE DENSITY - EVIDENCE FROM A FIELD-STUDY WITH SNOW BUNTINGS, PLECTROPHENAX-NIVALIS

被引：83
作者：
DOLMAN, PM [1 ]
机构：
[1] UNIV E ANGLIA, SCH BIOL SCI, NORWICH NR4 7TJ, NORFOLK, ENGLAND
来源：
OECOLOGIA | 1995年 / 102卷 / 04期
关键词：
INTERFERENCE; COMPETITION; FORAGING THEORY; RATIO DEPENDENCE;
D O I：
10.1007/BF00341364
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Intake rates of snow buntings feeding on artificial seed patches were measured at different bird densities, for each of two different seed densities. Interference occurred in the low seed-density treatment, with intake rates declining at high bird densities. However, interference was not found in the high seed-density treatment. The finding that the strength of interference may depend on resource density contradicts the hypothesis that the functional response is ratio-dependent (Arditi and Akcakaya 1990). The formulation for interference from Hassell and Varley (1969), and the models of Beddington (1975), Ruxton et al. (1992) and Holmgren (1995), also assume that the strength of interference is independent of resource density. The development of behaviour-based models that consider the relation between the intensity of interference, resource density and individual state may provide a more accurate description of the process of interference.
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收藏
页码：511 / 514
页数：4
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