Historical legacies in world amphibian diversity revealed by the turnover and nestedness components of Beta diversity.
Historical legacies in world amphibian diversity revealed by the turnover and nestedness components of Beta diversity.
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DOI：
10.1371/journal.pone.0032341
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Lobo JM
中科院分区：
文献类型：
--
作者：
Baselga A;Gómez-Rodríguez C;Lobo JM
历史进程预计将影响目前的多样性格局与当代环境因素相结合。我们假设，β多样性分区方法和基于阈值的方法的联合使用可能有助于揭示大规模的历史过程对目前的生物多样性的影响。我们分区区域内β多样性的营业额（物种替代所造成的组成的差异）和嵌套结果（物种损失所造成的物种组成的差异）组件。我们使用分段回归表明，两栖动物β多样性，两个不同的世界地区可以区分。在平行线37以下，β多样性由营业额主导，而在平行线37以上，β多样性由嵌套主导。值得注意的是，这些地区揭示了当分段回归方法被应用到纬度和末次冰期最大值（LGM）和现在的温度之间的差异，但不是当目前的能量-水因素进行分析。当这个阈值效应的历史气候变化是partialled了，目前的能源-水变量变得更加相关的嵌套产生的不同模式，而山区与较高的空间营业额。这一结果表明，嵌套模式所造成的物种损失，是由生理约束，而营业额与物种形成和/或更新世避难所。因此，新的基于阈值的观点可能有助于揭示历史因素在塑造目前两栖动物β多样性模式中的作用。
Historic processes are expected to influence present diversity patterns in combination with contemporary environmental factors. We hypothesise that the joint use of beta diversity partitioning methods and a threshold-based approach may help reveal the effect of large-scale historic processes on present biodiversity. We partitioned intra-regional beta diversity into its turnover (differences in composition caused by species replacements) and nestedness-resultant (differences in species composition caused by species losses) components. We used piecewise regressions to show that, for amphibian beta diversity, two different world regions can be distinguished. Below parallel 37, beta diversity is dominated by turnover, while above parallel 37, beta diversity is dominated by nestedness. Notably, these regions are revealed when the piecewise regression method is applied to the relationship between latitude and the difference between the Last Glacial Maximum (LGM) and the present temperature but not when present energy-water factors are analysed. When this threshold effect of historic climatic change is partialled out, current energy-water variables become more relevant to the nestedness-resultant dissimilarity patterns, while mountainous areas are associated with higher spatial turnover. This result suggests that nested patterns are caused by species losses that are determined by physiological constraints, whereas turnover is associated with speciation and/or Pleistocene refugia. Thus, the new threshold-based view may help reveal the role of historic factors in shaping present amphibian beta diversity patterns.
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影响因子：
6.4
作者：
Baselga, Andres
通讯作者：
Baselga, Andres
DOI：
10.1098/rspb.2007.0236
发表时间：
2007-07-07
影响因子：
4.7
作者：
Gaston, Kevin J.;Davies, Richard G.;Blackburn, Tim M.
通讯作者：
Blackburn, Tim M.
DOI：
10.1073/pnas.0505754103
发表时间：
2006-01-17
影响因子：
11.1
作者：
Graham, CH;Moritz, C;Williams, SE
通讯作者：
Williams, SE
影响因子：
5.9
作者：
Fjeldså, J;Lambin, E;Mertens, B
通讯作者：
Mertens, B
影响因子：
5.9
作者：
Baselga, Andres
通讯作者：
Baselga, Andres