Small but critical: semi-natural habitat fragments promote bee abundance in cotton agroecosystems across both Brazil and the United States
Small but critical: semi-natural habitat fragments promote bee abundance in cotton agroecosystems across both Brazil and the United States
复制标题
DOI：
10.1007/s10980-019-00868-x
复制
发表时间：
2019-07-01
影响因子：
5.2
通讯作者：
Jha, Shalene
中科院分区：
文献类型：
--
作者：
Cusser, Sarah;Grando, Carolina;Jha, Shalene
背景蜜蜂是全世界农作物最重要的传粉者。对于大多数蜜蜂来说，农作物内或附近的半自然栖息地可以提供重要的筑巢和食物资源。尽管如此，土地覆盖变化正在迅速减少农业生态景观中半自然栖息地的丰富度，对蜜蜂群落及其提供的服务可能产生负面影响。目标确定半自然栖息地的可用性如何影响整个生物地理区域的蜜蜂群落，这可能揭示超越单一区域或类群的共性和关键管理原则。方法我们分析和比较巴西和美国棉田蜜蜂群落组成的驱动因素，以揭示土地覆盖和土地覆盖变化如何影响这两个地区的蜜蜂群落组成。结果我们表明，影响棉花农业生态系统中蜜蜂群落的最关键因素在巴西和美国是相同的：蜜蜂丰度随着棉花开花密度和半自然栖息地的丰富度而增加。此外，五年内半自然栖息地的丧失会对这两个农业生态系统中的蜜蜂丰度产生负面影响。结论鉴于蜜蜂丰度对于提供棉花植物授粉服务的重要性，我们的研究结果强调了小型半自然栖息地碎片在支持热带和温带棉花农业生态系统的关键生态系统服务提供者方面的重要性。我们强调当地土地管理者在生物多样性保护中发挥的重要作用，以及他们通过支持保护半自然栖息地碎片的农业景观对授粉提供的潜在贡献。
ContextBees are the most important pollinators of crops worldwide. For most bees, patches of semi-natural habitat within or adjacent to crops can provide important nesting and food resources. Despite this, land cover change is rapidly reducing the abundance of semi-natural habitat within agroecological landscapes, with potentially negative consequences for bee communities and the services they provide.ObjectivesIdentify how the availability of semi-natural habitat impacts bee communities across biogeographic regions, which may reveal commonalities and key governing principles that transcend a single region or taxa.MethodsWe analyze and compare the drivers of bee community composition in cotton fields within Brazil and the U.S. to reveal how land cover and land cover change impact bee community composition across these two regions.ResultsWe show that the most critical factors impacting bee communities in cotton agroecosystems are the same in Brazil and the U.S.: bee abundance increases with cotton bloom density and the abundance of semi-natural habitat. Further, the loss of semi-natural habitat over a 5-year period negatively impacts bee abundance in both agroecosystems.ConclusionsGiven the importance of bee abundance for the provision of pollination service in cotton plants, our findings highlight the significance of small semi-natural habitat fragments in supporting key ecosystem service providers for both tropical and temperate cotton agroecological systems. We underscore the important role that local land managers play in biodiversity conservation, and the potential contribution they can make to pollination provision by supporting agricultural landscapes that conserve fragments of semi-natural habitat.