Assessing continental-scale risks for generalist and specialist pollinating bee species under climate change
Assessing continental-scale risks for generalist and specialist pollinating bee species under climate change
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评估气候变化下通用和专业授粉蜜蜂物种的大陆范围风险
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
R. Ohlemüller
中科院分区：
文献类型：
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作者：
Stuart P. M. Roberts;S. Potts;K. Biesmeijer;M. Kuhlmann;W. Kunin;R. Ohlemüller
气候变化使动植物种群面临更大的灭绝风险，这在许多分类群中都已得到证实。这项研究通过估计在2050年预测的气候条件下该地区的预期变化和合适的栖息地的隔离，评估了一个重要的授粉蜜蜂属内物种灭绝的风险。根据已知饲料植物的存在和气候适宜性来确定适宜的栖息地。为了研究生态专门化是否与灭绝风险有关，我们比较了三个物种和三个物种，它们是几个植物科的多面性花粉寻求者，三个物种专门研究单一植物物种的花粉。无论是专科物种还是通才物种，随着气候的变化，灭绝的风险都在增加，尤其是最专门化的物种(山毛虫和C.Wolfi)的灭绝风险更高。与北冰洋-阿尔卑斯山环境有关的牧草多面手C.impunctatus，由于可用气候生态位空间的显著减少，可能受到威胁。包括主要或唯一的花粉饲料植物的分布，在对单棱型或狭义寡纹型物种的分布进行建模时，并没有提高我们模型的预测精度，因为植物物种比与其相关的专门化蜜蜂要广泛得多。
Increased risks of extinction to populations of animals and plants under changing climate have now been demonstrated for many taxa. This study assesses the extinction risks to species within an important genus of pollinating bees (Colletes: Apidae) by estimating the expected changes in the area and isolation of suitable habitat under predicted climatic condition for 2050. Suitable habitat was defined on the basis of the presence of known forage plants as well as climatic suitability. To investigate whether ecological specialisation was linked to extinction risk we compared three species which were generalist pollen foragers on several plant families with three species which specialised on pollen from a single plant species. Both specialist and generalist species showed an increased risk of extinction with shifting climate, and this was particularly high for the most specialised species (Colletes anchusae and C. wolfi). The forage generalist C. impunctatus, which is associated with Boreo-Alpine environments, is potentially threatened through significant reduction in available climatic niche space. Including the distribution of the principal or sole pollen forage plant, when modelling the distribution of monolectic or narrowly oligolectic species, did not improve the predictive accuracy of our models as the plant species were considerably more widespread than the specialised bees associated with them.