Database Species-Area Relationships in Palaearctic Grasslands
نویسندگان
چکیده
منابع مشابه
Extending species-area relationships (SAR) to diversity-area relationships (DAR)
Aim: I extend the traditional SAR, which has achieved status of ecological law and plays a critical role in global biodiversity assessment, to the general (alphaor beta-diversity in Hill numbers) diversity area relationship (DAR). The extension was motivated to remedy the limitation of traditional SAR that only address one aspect of biodiversity scaling—species richness scaling over space. Inno...
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In addition to having a positive effect on species richness (species-area relationships [SARs]), habitat area can influence the presence of predators, which can indirectly influence prey richness. While these direct and indirect effects of area on richness occur simultaneously, no research has examined how predation might contribute to SAR variation. We extend MacArthur and Wilson's equilibrium...
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The general tendency for species number (S) to increase with sampled area (A) constitutes one of the most robust empirical laws of ecology, quantified by species-area relationships (SAR). In many ecosystems, SAR curves display a power-law dependence, S proportional, variantA(z). The exponent z is always less than one but shows significant variation in different ecosystems. We study the multityp...
متن کاملLinking species-area and species-energy relationships in Drosophila microcosms.
Resource availability is an important constraint on community structure. Some authors have suggested it conceptually links two of the most basic patterns in ecology, the species-area relationship and the latitudinal gradient in species richness. I present the first experimental test of this conjecture, by manipulating both the area and resource concentration of artificial larval drosophilid fly...
متن کاملSpecies-area relationships underestimate extinction rates
The species-area relationship (SAR), i.e. the increase in species number with area, has been repeatedly used to predict species extinction, at both local and global scales, with habitat reduction. He and Hubbell (Nature, 2011; 473, 368e371), however, argued that the function that relates species loss with decreasing habitat area cannot be simply obtained reversing the species-area accumulation ...
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ژورنال
عنوان ژورنال: Biodiversity & Ecology
سال: 2012
ISSN: 1613-9801
DOI: 10.7809/b-e.00115