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The Proportion of Core Species in a Community Varies with Spatial Scale and Environmental Heterogeneity
Başlık:
The Proportion of Core Species in a Community Varies with Spatial Scale and Environmental Heterogeneity
Yazar:
Jenkins, Molly F., author.
ISBN:
9780438063266
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (36 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Allen H. Hurlbert Committee members: James Umbanhowar; Peter White.
Özet:
Ecologists define a community as the set of species successfully reproducing and using resources in a shared space. In lieu of a species list, the subset of temporally persistent core species may more appropriately fulfill this definition. Analyses carried out in communities that support low proportions of core species may violate assumptions about the definition of a community, and so poorly align with ecological predictions. We used bird time series data to calculate the proportion of core species across a gradient of scales, to investigate potential generalities in this pattern, and to use these generalities to address discrepancies on drivers of community assembly. We found that the proportion of core species in an assemblage increased in a positive curve with scale and decreased with high environmental heterogeneity (e.g. elevation, vegetation coverage). Communities with high heterogeneity and low proportions of core species were likely dispersal-driven, not resource-limited.
Notlar:
School code: 0153
Tüzel Kişi Ek Girişi:
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(689916.1) | 689916-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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