High sensitivity of tropical forest birds to deforestation at lower altitudes.
High sensitivity of tropical forest birds to deforestation at lower altitudes.
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生境转换是热带生物多样性丧失的主要驱动力，但其在山地环境中的影响知之甚少。虽然群落对栖息地丧失的反应表现出强烈的海拔依赖性，但目前尚不清楚这些是否是通过群落组成的海拔周转和环境条件的敏感性或海拔变化的种间差异以及接近热阈值而产生的。在这里，我们通过量化哥伦比亚安第斯山脉3000 m海拔梯度上243种依赖森林的鸟类对景观规模森林丧失的敏感性如何变化，评估了海拔梯度上种间和种内变异的相对重要性。我们发现，生活在低海拔地区的物种受到附近景观中森林消失的强烈影响，而那些在高海拔地区的物种则相对不受干扰，这种影响与物种发生无关。相反，我们发现有限的证据种内海拔梯度的敏感性，与人口表现出类似的敏感性森林损失，无论他们存在于一个物种的海拔范围。因此，生物多样性对栖息地丧失的反应似乎是通过种间敏感性梯度而不是接近气候限制条件而产生的。
Habitat conversion is a major driver of tropical biodiversity loss, but its effects are poorly understood in montane environments. While community‐level responses to habitat loss display strong elevational dependencies, it is unclear whether these arise via elevational turnover in community composition and interspecific differences in sensitivity or elevational variation in environmental conditions and proximity to thermal thresholds. Here we assess the relative importance of inter‐ and intraspecific variation across the elevational gradient by quantifying how 243 forest‐dependent bird species vary in sensitivity to landscape‐scale forest loss across a 3000‐m elevational gradient in the Colombian Andes. We find that species that live at lower elevations are strongly affected by loss of forest in the nearby landscape, while those at higher elevations appear relatively unperturbed, an effect that is independent of phylogeny. Conversely, we find limited evidence of intraspecific elevational gradients in sensitivity, with populations displaying similar sensitivities to forest loss, regardless of where they exist in a species' elevational range. Gradients in biodiversity response to habitat loss thus appear to arise via interspecific gradients in sensitivity rather than proximity to climatically limiting conditions.
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影响因子：
4.8
作者：
Gonzalez-del-Pliego, Pamela;Scheffers, Brett R.;Edwards, David P.
通讯作者：
Edwards, David P.
影响因子：
5.5
作者：
Gerst, Katharine L.;Angert, Amy L.;Venable, D. Lawrence
通讯作者：
Venable, D. Lawrence
影响因子：
5.5
作者：
GUARIGUATA, MR
通讯作者：
GUARIGUATA, MR
影响因子：
6.6
作者：
Etter, A;McAlpine, C;Possingham, HP
通讯作者：
Possingham, HP
影响因子：
16.6
作者：
Elsen, Paul R.;Monahan, William B.;Merenlender, Adina M.
通讯作者：
Merenlender, Adina M.