Scaling up effects of measures mitigating pollinator loss from local- to landscape-level population responses

1. Declining pollinator populations have caused concern about consequences for food production, and have initiated an increasing number of initiatives that aim to mitigate pollinator loss through enhancement of floral resources. Studies evaluating effects of mitigation measures generally demonstrate positive responses of pollinators to floral resource enhancement. However, it remains unclear whether this represents landscape-level population effects or results from a spatial redistribution of individuals from otherwise unaffected populations. 2. Here we present a method for estimating landscape-level population effects using data from commonly used standardized pollinator transect surveys. The approach links local density responses of pollinators in both mitigation sites and surrounding landscape elements to the area these habitats occupy in mitigation landscapes as well as control landscapes to obtain landscape-level population estimates. 3. We demonstrate the method using data from a ...

1. 传粉昆虫（pollinator）种群数量下降引发了人们对粮食生产相关后果的担忧，同时催生了愈发众多的修复举措，旨在通过强化蜜源植物资源（floral resources）以缓解传粉昆虫种群的衰减。现有针对修复措施效果的评估研究普遍表明，传粉昆虫对蜜源植物资源强化呈现出正向响应。但目前仍不明确，此类响应究竟反映的是景观尺度下的种群层面效应，还是仅源于传粉昆虫个体从未受影响的种群中发生空间再分布所导致的结果。2. 本研究提出一种基于通用标准化传粉昆虫样带调查数据的景观尺度种群效应评估方法。该方法将修复样地及周边景观单元内传粉昆虫的局域密度响应，与修复景观及对照景观中各类生境的占比面积相结合，以此得到景观尺度的种群数量评估结果。3. 本研究利用来自某一未完整披露的数据集对该方法进行了演示。