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- W2077671746 abstract "Nests of the mound-building ant, Formica altipetens (Hymenoptera: Formicidae), exhibit a pattern of density-dependent spacing. This pattern is observed across 12 small sites (0·0625 and 0·16 ha) and one larger site (2 ha), where F. altipetens nest density varies from 0·01–0·10 nest m−2. Nests are clumped on sites where the average density is less than 0·02 nests m−2. Nests are regularly dispersed on all sites where the average nest density is greater than 0·02 nests m−2. Nest spacing is increasingly regular on sites where there are more ant nests. A simple model that includes both clumped dispersal and local competition during nest establishment also yields a density-dependent spacing pattern. The model consists of two basic parameters: the dispersal distance (D) and the nest territory size (T). A parameterization of the model where D = 10 m and T = 2·5 m explains 75·7% of the empirical variance in an index of nest spacing (the index of dispersion, R, from the Clark & Evans nearest neighbor distance analysis). The spatial patterns of F. altipetens differ quite strongly from “null” versions of the model (no competition with either random dispersal or clumped dispersal). Thus, a model that includes both competition and clumped dispersal explains the spatial arrangement of a mound-building ant in both a qualitative and a quantitative sense." @default.
- W2077671746 created "2016-06-24" @default.
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- W2077671746 date "1990-12-01" @default.
- W2077671746 modified "2023-09-25" @default.
- W2077671746 title "Theoretical considerations of density-dependent spacing of a mound-building ant (Formica altipetens)" @default.
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- W2077671746 doi "https://doi.org/10.1016/s0022-5193(05)80489-8" @default.
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