Community Ordering and Niche Width
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Niche width and overlap pdf
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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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 کاملRank-Width and Well-Quasi-Ordering
Robertson and Seymour (1990) proved that graphs of bounded tree-width are well-quasi-ordered by the graph minor relation. By extending their arguments, Geelen, Gerards, and Whittle (2002) proved that binary matroids of bounded branch-width are well-quasi-ordered by the matroid minor relation. We prove another theorem of this kind in terms of rank-width and vertex-minors. For a graph G = (V,E) a...
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Does well-quasi-ordering by induced subgraphs imply bounded clique-width for hereditary classes? This question was asked by Daligault, Rao and Thomassé in [7]. We answer this question negatively by presenting a hereditary class of graphs of unbounded clique-width which is well-quasi-ordered by the induced subgraph relation. We also show that graphs in our class have at most logarithmic clique-w...
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ژورنال
عنوان ژورنال: Science
سال: 1970
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.170.3964.1335