Greater growth stability of trees in marginal habitats suggests a patchy pattern of population loss and retention in response to increased drought at the rear edge.
Greater growth stability of trees in marginal habitats suggests a patchy pattern of population loss and retention in response to increased drought at the rear edge.
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边缘栖息地树木的生长稳定性较高，这表明由于后缘干旱加剧，种群数量损失和保留的不均匀模式。
DOI：
10.1111/ele.13329
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
Vilà-Cabrera A
中科院分区：
文献类型：
--
作者：
Vilà-Cabrera A
预计随着气候变暖，物种后方边缘会缩小，但种群持续存在的证据正在积累。考虑到这种差异对于预测和规划物种分布范围的缩小至关重要。在以欧洲山毛榉为主的温带森林的地中海边缘，我们测试了这样的假设：个体表现应在物种生态耐受力的限度内下降，以应对日益严重的干旱。我们在地理和生态边缘性的交叉因素设计中对 40 个种群进行了抽样，并评估了树木的生长恢复力和对近期干旱的响应能力。干旱影响发生在整个后缘，但在地理上孤立的边缘栖息地中，树木生长稳定性出乎意料地高，而在物种的连续范围和质量较好的栖息地中，树木生长稳定性低于预期。我们的研究结果表明，在后缘，范围变化将非常不均匀，其特点是人口密度减少，但当地人口保留，而不是突然范围缩小。
Species rear range edges are predicted to retract as climate warms, yet evidence of population persistence is accumulating. Accounting for this disparity is essential to enable prediction and planning for species’ range retractions. At the Mediterranean edge of European beech‐dominated temperate forest, we tested the hypothesis that individual performance should decline at the limit of the species’ ecological tolerance in response to increased drought. We sampled 40 populations in a crossed factor design of geographical and ecological marginality and assessed tree growth resilience and decline in response to recent drought. Drought impacts occurred across the rear edge, but tree growth stability was unexpectedly high in geographically isolated marginal habitat and lower than anticipated in the species’ continuous range and better‐quality habitat. Our findings demonstrate that, at the rear edge, range shifts will be highly uneven and characterised by reduction in population density with local population retention rather than abrupt range retractions.
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影响因子：
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作者：
Gazol, Antonio;Julio Camarero, Jesus;Galvan, J. Diego
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影响因子：
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