Results 251 to 260 of about 26,514 (296)

Selection and Interspecific Competition

1977
Other organisms constitute a component of the environment to which animals respond by natural selection. Among the different kinds of interspecific interactions, competition for common resources is attributed an important role in the evolution of the single species and for the structure of biological communities.
Fenchel, Tom M., Christiansen, Freddy
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Interspecific competition, predation and species diversity

Journal of Theoretical Biology, 1970
Abstract A review was made of some mathematical population models and their applications to problems of interspecific competition and predator-prey relationships. These were considered in relation to some observations and experiments suggesting local increases in species diversity under predation in competitive situations.
J D, Parrish, S B, Saila
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Interspecific Competition and Exploitation

Journal of the Fisheries Research Board of Canada, 1963
The consequences of exploitation of either or both of a pair of competing species are examined using the Lotka-Volterra equations. The removal of a fixed proportion of a population on an instantaneous basis shifts the equilibrium population sizes for both the exploited species and its competitor.
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Spatial heterogeneity and interspecific competition

Theoretical Population Biology, 1982
A model of two competing species is presented in which each species is able to disperse over a single spatial axis. The spatial axis is composed of two intervals with different carrying capacities. We ask the question: If species one is alone and at population dynamic equilibrium, then when can species two successfully invade when rare?
Pacala, S. W., Roughgarden, J.
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Mode of competition and interspecific competitive outcomes

1993
Abstract Competition (both intra- and interspecific) has been one of the most intensively studied subjects in ecological research (Connell 1983; Schoener 1983; Abrams 1988). This is the first and most important step in bridging the gap between community ecology and lower levels of ecological phenomena at the population and individual ...
Koichi Fujii, Yukihiko Toquenaga
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Overlap in resource use, and interspecific competition

Oecologia, 1974
When several species co-exist, the amount by which they overlap in their use of resources is a measure of their similarity to one another. As such, resource overlap does not measure the amount of competition among them. When the resources are not limiting to population growth, patterns of resource use may overlap to any degree.
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Detection of Interspecific Competition in Parasite Communities

Journal of Parasitology, 2005
Matrices of correlation coefficients between the abundances or intensities of all pairs of helminth species, across all individual hosts in a sample, are regularly used to detect possible cases of interspecific competition in parasite communities. In these matrices, however, the range of possible values that any correlation coefficient can take is not -
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Interspecific Competition Models Derived from Competition Among Individuals

Bulletin of Mathematical Biology, 2012
This paper demonstrates how discrete-time models describing population dynamics of two competing species can be derived in a bottom-up manner by considering competition for resources among individuals and the spatial distribution of individuals. The competition type of each species is assumed to be either scramble, contest, or an intermediate between ...
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Field Experiments on Interspecific Competition

The American Naturalist, 1983
The study of interspecific competition has long been one of ecology's most fashionable pursuits. Stimulated in part by a simple theory (Lotka 1932; Volterra 1926; Gause 1934; Hutchinson 1959; MacArthur and Levins 1967), ecologists gathered numerous data on the apparent ways species competitively coexist or exclude one another (reviews in Schoener 1974b,
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Interspecific Competition and Community Structure

1984
Much of our previous discussion has relied, whether implicitly or explicitly, on considerations of ecological competition. In the last chapter particularly, such consideration became more and more explicit as we introduced ideas of both inter- and intraspecific competition and their role in shaping the niche, niche position, niche breadth and degree of
R. J. Putman, S. D. Wratten
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