Temporal variability and nestedness in California grassland species composition
نویسندگان
چکیده
منابع مشابه
Species Richness and California Voles in an Annual and a Perennial Grassland
—Populations of a common burrowing rodent, Microtus californicus (the California vole), thrive in ungrazed or lightly grazed grasslands in coastal California. Two sites ungrazed by livestock, one dominated by native perennial grasses and another dominated by invasive annuals, were evaluated over 2 consecutive years for the relationship between plant species richness and location of M. californi...
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Biological monitoring of aquatic biota is used to assess the impact of changes in the ∗We are grateful to Melissa Hughes of EPA Delaware and Tony Olsen of EPA Corvallis for making these data available to us, and to Wendy Meiring for a careful reading of the paper and many valuable suggestions. This research had partial support from the United States Environmental Protection Agency under a coope...
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Habitat fragmentation is well known to adversely affect species living in the remaining, relatively isolated, habitat patches, especially for those having small range size and low density. This negative effect has been critical in coastal resting habitats. We analysed the lizard composition and richness of restinga habitats in 16 restinga habitats encompassing three Brazilian states (Rio de Jan...
متن کامل17 Spatial and Temporal Variation in Species Composition in California Grasslands : The Interaction of Drought and Substratum
Water is the principal limiting resource for Californian Mediterranean-climate plants. The relationship between rainfall variation and the abundance and distribution of plant species was investigated at the Jasper Ridge Biological Preserve near Stanford University. Five years of rainfall data (1986-1990) were combined with a yearly census of plant species on a 100m transect to relate inter-annu...
متن کاملNull model analysis of species nestedness patterns.
Nestedness is a common biogeographic pattern in which small communities form proper subsets of large communities. However, the detection of nestedness in binary presence-absence matrices will be affected by both the metric used to quantify nestedness and the reference null distribution. In this study, we assessed the statistical performance of eight nestedness metrics and six null model algorit...
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ژورنال
عنوان ژورنال: Ecology
سال: 2009
ISSN: 0012-9658
DOI: 10.1890/08-1677.1