Niche Overlap and Diffuse Competition
نویسندگان
چکیده
منابع مشابه
Niche overlap and diffuse competition.
Current theory predicts a distinct upper limit on the permissible degree of niche overlap; moreover, theory suggests that maximal tolerable overlap should be relatively insensitive to environmental variability. Data presented here demonstrate that, within the lizard subset of natural desert communities, niche overlap decreases both with increasing environmental variability and with increasing n...
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This measure ranges between 0 no overlap and 1 complete overlap, so 0. We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá.Individual foraging specialization: niche width versus niche overlap. Sargeant sargeantfiu.edu, Dept of Biology, Georgetown Univ.of these insects, and their trophic niche brea...
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Niche overlap is increasingly used as a way of measuring the intensity of interorganizational competition. This paper examines and compares various distance and cosine measures of niche overlap. The analysis in this paper shows that Euclidean distance applied to the raw data as well as to transformed data is not an appropriate measure of niche overlap. An alternative measure from the cosine fam...
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A recent review of individual specialization suggests it is widespread and has important implications for conservation, ecology and evolution (Bolnick et al. 2003). Dozens of studies have identified ‘‘individual foraging specialization’’ in a variety of species, yet upon closer examination these studies differ markedly in how they define and quantify specialization. Given such diverse approache...
متن کاملDoes environmental variability limit niche overlap ? ( limiting similarity / invasion / stochastic competition models / random environments / stochastic approximations )
A stochastic theory of limiting similarity is presented that attempts to quantify the relationship between tolerable niche overlap among competing species and the degree of environmental fluctuation. The theory is based on a heuristic analytical approximation that provides conditions under which a rare invadin species can increase in the presence of a community of established competitors. The m...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1974
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.71.5.2141