Seasonal shifts and complementary use of pollen sources by two bees, a lacewing and a ladybeetle species in European agricultural landscapes
Seasonal shifts and complementary use of pollen sources by two bees, a lacewing and a ladybeetle species in European agricultural landscapes
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DOI：
10.1111/1365-2664.13483
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发表时间：
2019-08-26
影响因子：
5.7
通讯作者：
Albrecht, Matthias
中科院分区：
文献类型：
--
作者：
Bertrand, Colette;Eckerter, Philipp W.;Albrecht, Matthias
食物资源（如花粉）的持续可用性对许多为农业提供授粉和害虫控制服务的昆虫至关重要。然而，人们对这些物种共享或互补利用花卉资源缺乏了解，这阻碍了更有效的景观管理，同时在农业生态系统中促进它们。在这里，我们同时量化的大黄蜂（熊蜂terrestris）和泥瓦匠蜜蜂（壁蜂bicornis），两种蜜蜂被认为是重要的作物授粉，以及草蛉（Chrysoperla carnea）和瓢虫物种（异色瓢虫），作物蚜虫的常见捕食者，在整个季节在23个农业景观在德国和瑞士的花粉使用。花粉食性在C. carnea和H.与两种蜜蜂相比，所有四种蜜蜂都具有关键的花粉类型，如槭属、栎属、柳属和李属。所有物种表现出明显的转变，花粉来源主要是木本植物（主要是树木）在春季，主要是草本植物在夏季。大多数花粉（总体>= 64%）来自非农业植物，即使在作物为主的景观。合成与应用。我们的研究结果强调了树木作为许多昆虫花粉来源的重要性，特别是在季节的早期。我们的研究结果支持促进异质农业景观的激励措施，包括木本和草本半自然栖息地，确保昆虫物种的花卉资源的物候互补性，可以为农业提供授粉和害虫控制服务。确定的关键植物物种可以帮助设计和优化农业环境计划，以促进这些功能重要的昆虫。
Continuous availability of food resources, such as pollen, is vital for many insects that provide pollination and pest control services to agriculture. However, there is a lack of knowledge about the shared or complementary use of floral resources by such species, which hampers more effective landscape management to simultaneously promote them in agroecosystems. Here, we simultaneously quantified pollen use by a bumblebee (Bombus terrestris) and a mason bee (Osmia bicornis), two bee species recognized as important crop pollinators, as well as a lacewing (Chrysoperla carnea) and a ladybeetle species (Harmonia axyridis), both common predators of crop aphids, throughout the season in 23 agricultural landscapes in Germany and Switzerland. Pollen diets were more diverse and similar among C. carnea and H. axyridis compared to the two bee species, but all four species shared key pollen types early in the season such as Acer, Quercus, Salix and Prunus. All species exhibited a pronounced shift in pollen sources from primarily woody plants (mainly trees) in spring to primarily herbaceous plants in summer. The majority of pollen (overall >= 64%) came from non-agricultural plants even in crop-dominated landscapes. Synthesis and applications. Our results highlight the importance of trees as pollen sources for many insect species, particularly early in the season. Our findings support incentives that promote heterogeneous agricultural landscapes including both woody and herbaceous semi-natural habitats, ensuring phenological complementarity of floral resources for insect species that can provide pollination and pest control services to agriculture. The identified key plant species can help to design and optimize agri-environment schemes to promote these functionally important insects.