Data from: Habitat restoration promotes pollinator persistence and colonization in intensively managed agriculture

Widespread evidence of pollinator declines has led to policies supporting habitat restoration including in agricultural landscapes. Yet, little is yet known about the effectiveness of these restoration techniques for promoting stable populations and communities of pollinators, especially in intensively managed agricultural landscapes. Introducing floral resources, such as flowering hedgerows, to enhance intensively cultivated agricultural landscapes is known to increase the abundances of native insect pollinators in and around restored areas. Whether this is a result of local short-term concentration at flowers or indicative of true increases in the persistence and species richness of these communities remains unclear. It is also unknown whether this practice supports species of conservation concern (e.g., those with more specialized dietary requirements). Analyzing occupancies of native bees and syrphid flies from 330 surveys across 15 sites over eight years, we found that hedgerow restoration promotes rates of between-season persistence and colonization as compared with unrestored field edges. Enhanced persistence and colonization, in turn, led to the formation of more species-rich communities. We also find that hedgerows benefit floral resource specialists more than generalists, emphasizing the value of this restoration technique for conservation in agricultural landscapes.传粉者（pollinator）种群衰减的广泛证据已推动相关政策出台，支持包括农业景观在内的生境修复工作。然而目前学界对这类修复技术在促进传粉者稳定种群与群落构建方面的实际效果仍知之甚少，在集约化管理的农业景观中这一问题尤为突出。已有研究证实，在集约化耕作的农业景观中引入开花绿篱等花类资源以优化生境，可提升修复区域及其周边本土昆虫传粉者的种群丰度。但目前仍无法明确，这一丰度提升究竟是传粉者短期在花源处局部聚集的结果，还是反映了这些群落的存续能力与物种丰富度的真实提升。此外，该修复手段是否能够助力保育关注物种（例如饮食特化程度更高的物种）的存续，同样尚未可知。本研究通过分析8年间覆盖15个样地的330次野外调查中本土蜂类与食蚜蝇的种群占据率，发现相较于未修复的田埂边缘，绿篱修复可显著提升传粉者群落的季间存续速率与定殖速率。而存续能力与定殖效率的提升，进而促成了物种更为丰富的传粉者群落的形成。本研究同时发现，绿篱对花资源特化物种的保育增益效果优于广食性物种，这进一步凸显了该修复技术在农业景观生物多样性保护中的重要应用价值。