Range expansion through fragmented landscapes under a variable climate.

Range expansion through fragmented landscapes under a variable climate.
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DOI:
10.1111/ele.12129
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发表时间:
2013-07
期刊:
影响因子:
8.8
通讯作者:
Wilson RJ
Wilson RJ
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Bennie J;Hodgson JA;Lawson CR;Holloway CT;Roy DB;Brereton T;Thomas CD;Wilson RJ

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生态对气候变化的反应可能取决于天气和当地小气候的复杂变化模式,这些模式与全球平均气温的上升重叠。在这里,我们表明,高分辨率的时间和空间变化的温度驱动的动态范围扩展的一个范例物种,蝴蝶Hesperia逗号。使用高分辨率(5米)的植被表面小气候模型,我们估计了27年的906个栖息地补丁在物种的范围边缘的热适宜性。人口和集合种群模型,将这个动态的小气候表面改善预测观察到的年度变化,人口密度和补丁占用动态在物种的范围扩展,从1982年到2009年。我们的研究结果揭示了精细尺度的短期环境变化如何通过空间局部化的间歇性扩张和收缩来驱动范围扩张的速率和模式。因此,阐明动态小气候可以改善与保护措施相关的时空尺度上物种分布范围变化的模型。
Ecological responses to climate change may depend on complex patterns of variability in weather and local microclimate that overlay global increases in mean temperature. Here, we show that high-resolution temporal and spatial variability in temperature drives the dynamics of range expansion for an exemplar species, the butterfly Hesperia comma. Using fine-resolution (5 m) models of vegetation surface microclimate, we estimate the thermal suitability of 906 habitat patches at the species' range margin for 27 years. Population and metapopulation models that incorporate this dynamic microclimate surface improve predictions of observed annual changes to population density and patch occupancy dynamics during the species' range expansion from 1982 to 2009. Our findings reveal how fine-scale, short-term environmental variability drives rates and patterns of range expansion through spatially localised, intermittent episodes of expansion and contraction. Incorporating dynamic microclimates can thus improve models of species range shifts at spatial and temporal scales relevant to conservation interventions.
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