Diverse pollinator communities enhance plant reproductive success
Diverse pollinator communities enhance plant reproductive success
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DOI：
10.1098/rspb.2012.1621
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发表时间：
2012-12-07
影响因子：
4.7
通讯作者：
Mueller, Christine B.
中科院分区：
文献类型：
--
作者：
Albrecht, Matthias;Schmid, Bernhard;Mueller, Christine B.
了解生物多样性丧失的功能后果是生态学的一个主要目标。动物传粉是一项重要的生态系统功能和为人类提供的服务。然而，人们对传粉者多样性如何影响授粉服务知之甚少。采用替代设计，研究了传粉者群落功能群（FG）和物种丰富度对专性异交模式植物Raphanus sativus繁殖成功的影响。结果和结实率随传粉者FG丰度的增加而增加。在单一传粉者群落中，结实率随物种丰富度的增加而增加。然而，在多个fg群落中，与中等物种丰富度相比，最高物种丰富度导致授粉服务略有减少。我们的分析表明，群居蜜蜂的造访率比独居蜜蜂或食蚜蝇高4倍，这是促成传粉者多样性-传粉服务关系的重要因素，特别是在坐果方面。不同时段的访花率在群居蜜蜂、独居蜜蜂和食蚜蝇之间存在差异，且花高差异较小，表明这些传粉者群体之间存在生态位互补。我们的研究表明，在植物种群水平上，不同传粉媒介群落的传粉服务增强，并表明生态位互补性和传粉媒介群落中特定分类群的存在推动了这种正相关关系。
Understanding the functional consequences of biodiversity loss is a major goal of ecology. Animal-mediated pollination is an essential ecosystem function and service provided to mankind. However, little is known how pollinator diversity could affect pollination services. Using a substitutive design, we experimentally manipulated functional group (FG) and species richness of pollinator communities to investigate their consequences on the reproductive success of an obligate out-crossing model plant species, Raphanus sativus. Both fruit and seed set increased with pollinator FG richness. Furthermore, seed set increased with species richness in pollinator communities composed of a single FG. However, in multiple-FG communities, highest species richness resulted in slightly reduced pollination services compared with intermediate species richness. Our analysis indicates that the presence of social bees, which showed roughly four times higher visitation rates than solitary bees or hoverflies, was an important factor contributing to the positive pollinator diversity-pollination service relationship, in particular, for fruit set. Visitation rate at different daytimes, and less so among flower heights, varied among social bees, solitary bees and hoverflies, indicating a niche complementarity among these pollinator groups. Our study demonstrates enhanced pollination services of diverse pollinator communities at the plant population level and suggests that both the niche complementarity and the presence of specific taxa in a pollinator community drive this positive relationship.