Multiscale analyses of mammal species composition--environment relationship in the contiguous USA.

Multiscale analyses of mammal species composition--environment relationship in the contiguous USA.
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DOI:
10.1371/journal.pone.0025440
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Carmel Y
Carmel Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kent R;Bar-Massada A;Carmel Y

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物种组成与其环境决定因素之间的关系是生态学的一个基本目标。这种关系是规模依赖的,物种组成的预测因素通常包括气候,地形,历史遗产,土地利用,人口水平和随机过程等变量。我们的目标是量化环境决定因素对美国哺乳动物组成的影响,在不同的空间尺度。我们发现,气候是影响物种组成的主导因素,其相对影响增加的空间尺度的增加。影响物种组成的另一个因素是土地利用-土地覆盖。我们的研究结果表明,其影响随着空间尺度的增加而减少。我们提供了定量指标的高度显着影响的气候和土地利用土地覆盖变量对哺乳动物的组成在多个尺度。
Relationships between species composition and its environmental determinants are a basic objective of ecology. Such relationships are scale dependent, and predictors of species composition typically include variables such as climate, topographic, historical legacies, land uses, human population levels, and random processes. Our objective was to quantify the effect of environmental determinants on U.S. mammal composition at various spatial scales. We found that climate was the predominant factor affecting species composition, and its relative impact increased in correlation with the increase of the spatial scale. Another factor affecting species composition is land-use–land-cover. Our findings showed that its impact decreased as the spatial scale increased. We provide quantitative indication of highly significant effect of climate and land-use–land-cover variables on mammal composition at multiple scales.
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