DIRECT AND INDIRECT EFFECTS OF N-SPECIES COMPETITION

被引:88
作者
LAWLOR, LR
机构
[1] Department of Zoology, University of Texas, Austin, 78712, Texas
关键词
D O I
10.1007/BF00344961
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
A measure of net interspecific competition is proposed which incorporates both direct and indirect effects between each species pair in a community. Indirect effects of one species on another may be mediated through other species in the community such that changes in the first species induce changes in other species which in turn directly affect the second species. Even in a competitive community these indirect effects are not necessarily always of a competitive nature and may sometimes actually act to oppose the effects of direct competition. Species pairs which are strong competitors in isolation may exhibit little net competition or even appear mutualistic depending on the other species present in the community. An expression for the net competitive effects between species pairs is derived in terms of the elements of the α-matrix representation of the direct competitive effects. Examples calculated from the literature suggest that indirect competitive effects may often act to counterbalance direct competition between otherwise strong competitors in natural communities. © 1979 Springer-Verlag.
引用
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页码:355 / 364
页数:10
相关论文
共 20 条
[1]   COMPETITION BETWEEN SPECIES - THEORETICAL MODELS AND EXPERIMENTAL TESTS [J].
AYALA, FJ ;
GILPIN, ME ;
EHRENFELD, JG .
THEORETICAL POPULATION BIOLOGY, 1973, 4 (03) :331-356
[2]  
Cody M.L., 1974, COMPETITION STRUCTUR
[3]   MEASUREMENT OF NICHE BREADTH AND OVERLAP [J].
COLWELL, RK ;
FUTUYMA, DJ .
ECOLOGY, 1971, 52 (04) :567-+
[4]  
Diamond J.M., 1975, P342
[5]   COMPETITIVE INTERACTIONS IN ECOSYSTEMS [J].
LEVINE, SH .
AMERICAN NATURALIST, 1976, 110 (976) :903-910
[6]  
Levins R., 1975, P16
[7]  
LEVINS RICHARD, 1968
[8]  
MacArthur R.H., 1972, pvii
[9]  
MacArthur RH., 1968, POPULATION BIOL EVOL, P159
[10]  
May R.M., 1973, STABILITY COMPLEXITY