Abstract

Global biodiversity declines are attributed to many factors, including landscape fragmentation and vegetation homogenization. These patterns may be exacerbated by the intensification of management in agroecosystems, as management to meet the increasing demand for food, fuel, and fiber often comes at the cost of biodiversity and subsequent ecosystem functions and services. Conserving biodiversity will be necessary to create sustainable agroecosystems capable of optimizing both production and services such as pollination. We conducted a meta-analysis with 109 studies to examine the relationship between plant species richness and pollinator species richness to determine whether higher plant species richness supports higher pollinator species richness, especially in areas prone to biodiversity losses. We found most groups of insect pollinators, including bees, butterflies, flies, moths, and wasps, responded positively to increasing plant species richness, irrespective of location or land use, suggesting the capacity to increase pollinator richness through management strategies that increase plant species richness. However, we found pollinators in manipulated studies did not consistently respond to increasing plant species richness despite the overall positive relationships in observational and experimental studies, highlighting the importance of plant selection when making management decisions aiming to improve pollinator richness. Additional studies in regions such as Africa and South America will help fill in latitudinal gradients and provide greater coverage necessary to refine patterns. Increasing plant species richness through management changes or restorations will likely increase pollinator richness and be beneficial in agroecosystems to support biodiversity.

中文翻译：

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荟萃分析：较高的植物丰富度支持多种土地利用类型的较高的授粉媒介丰富度

抽象的

全球生物多样性的下降归因于许多因素，包括景观破碎化和植被均质化。农业生态系统管理的强化可能会加剧这些模式，因为为满足对食品，燃料和纤维不断增长的需求而进行的管理往往以生物多样性以及随后的生态系统功能和服务为代价。保护生物多样性对于建立能够优化生产和服务（例如授粉）的可持续农业生态系统是必不可少的。我们对109项研究进行了荟萃分析，以检查植物物种丰富度与传粉媒介物种丰富度之间的关系，以确定较高的植物物种丰富度是否支持较高的传粉媒介物种丰富度，尤其是在容易造成生物多样性丧失的地区。我们发现大多数昆虫传粉者群体，包括蜜蜂，蝴蝶，苍蝇，飞蛾和黄蜂，无论其位置或土地使用状况如何，对增加植物物种的丰富度都做出了积极反应，这表明可以通过增加植物物种丰富度的管理策略来增加授粉媒介的丰富度。但是，我们发现尽管进行了观察和实验研究，总体上呈正相关关系，但在受控研究中的授粉媒介并不能始终如一地对增加的植物物种丰富度做出响应，这突出表明了在制定旨在提高授粉媒介丰富度的管理决策时选择植物的重要性。在非洲和南美等地区进行的其他研究将有助于填补纬度梯度，并提供更大的覆盖面以完善模式。