Dispersal capacity and diet breadth modify the response of wild bees to habitat loss
Dispersal capacity and diet breadth modify the response of wild bees to habitat loss
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DOI：
10.1098/rspb.2009.2221
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发表时间：
2010-07-07
影响因子：
4.7
通讯作者：
Ockinger, Erik
中科院分区：
文献类型：
--
作者：
Bommarco, Riccardo;Biesmeijer, Jacobus C.;Ockinger, Erik
栖息地丧失对生物多样性构成重大威胁，物种特有的灭绝风险与生命史特征有着千丝万缕的联系。在许多功能重要的分类群和更大的大陆尺度上，这种关系的记录仍然很少。利用来自三个国家的五个重复实地研究的数据，我们研究了野生蜜蜂物种丰富度如何随栖息地斑块大小而变化。我们假设这种关系的形式受到体型、寄主植物专业化程度和社会性的影响。在所有物种中，我们发现正的物种面积斜率（z = 0.19），物种特征修正了这一关系。体型大的通才比体型小的通才有更低的z值。与预测相反，与大型专家相比，小型专家的z值相似或略低，小型通才受栖息地丧失的影响也比小型专家更强烈。无论体型大小，社会蜜蜂都受到栖息地丧失的负面影响（z = 0.11）。我们得出结论，栖息地的丧失导致野生蜜蜂群落物种组成的明显变化。
Habitat loss poses a major threat to biodiversity, and species-specific extinction risks are inextricably linked to life-history characteristics. This relationship is still poorly documented for many functionally important taxa, and at larger continental scales. With data from five replicated field studies from three countries, we examined how species richness of wild bees varies with habitat patch size. We hypothesized that the form of this relationship is affected by body size, degree of host plant specialization and sociality. Across all species, we found a positive species-area slope (z = 0.19), and species traits modified this relationship. Large-bodied generalists had a lower z value than small generalists. Contrary to predictions, small specialists had similar or slightly lower z value compared with large specialists, and small generalists also tended to be more strongly affected by habitat loss as compared with small specialists. Social bees were negatively affected by habitat loss (z = 0.11) irrespective of body size. We conclude that habitat loss leads to clear shifts in the species composition of wild bee communities.