Willow Canopies and Plant Community Structure along an Alpine Environmental Gradient
نویسندگان
چکیده
منابع مشابه
Lizard community structure along environmental gradients.
1. How the total number of individuals in a community is divided among its species is governed by both the distribution of species along landscape-scale environmental gradients and by local resource partitioning. In vertebrate ectotherms, abiotic environmental conditions may constrain geographic distributions more strongly than local population densities due to thermal constraints on resource a...
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Biological systematics studies suggest that species are discretized in niche space. That is, rather than seeing a continuum of organism types with respect to continuous environmental variations, observers instead find discrete species or clumps of species, with one clump separated from another in niche space by a gap. Here, using a simple one dimensional model with a smoothly varying environmen...
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Environmental gradients represent an ideal framework for studying adaptive variation in the life history of plant species. However, on very steep gradients, largely contrasting conditions at the two gradient ends often limit the distribution of the same species across the whole range of environmental conditions. Here, we study phenotypic variation in a winter annual crucifer Biscutella didyma p...
متن کاملDeterminants of the detrital arthropod community structure: the effects of temperature and resources along an environmental gradient
J.-P. Lessard ([email protected]) and N. J. Sanders, Center for Macroecology, Evolution and Climate, Dept of Biology, Univ. of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen O, Denmark. – W. N. Reynolds, D. A. Fowler and N. J. Sanders, Dept of Ecology and Evolutionary Biology, Univ. of Tennessee, 569 Dabney Hall, Knoxville, TN 37996, USA. –T. E. Sackett, Dept of Geography, Univ. of Tor...
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BACKGROUND AND AIMS Neutral theory predicts that the diversity and relative abundance of species in ecological communities do not depend on their specific traits. This prediction remains controversial, as many studies suggest that variations in the niches of species determine the structure of communities. The aim of this study was to test empirically the relative importance of niche and neutral...
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ژورنال
عنوان ژورنال: Arctic, Antarctic, and Alpine Research
سال: 2004
ISSN: 1523-0430
DOI: 10.1657/00