Understanding interactive effects between habitat configuration and pesticide use for pollination: towards better informed landscape management.

IF 4.6 2区 环境科学与生态学 Q1 ECOLOGY
Ecological Processes Pub Date : 2025-01-01 Epub Date: 2025-03-03 DOI:10.1186/s13717-025-00587-z
Swantje Gebhardt, Jerry van Dijk, Marjolein E Lof, Martin J Wassen, Martha Bakker
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引用次数: 0

Abstract

Background: The restoration of natural landscape elements is a frequently adopted pathway to improve wild pollinator abundance, diversity, and their pollination services in intensively used agricultural landscapes. However, pollinators in the intended refuges can become exposed to agrochemicals when foraging in surrounding agricultural fields. In order to effectively design pollinator conservation measures such as habitat restoration or pesticide reduction schemes, the effect of land use configuration on pesticide exposure and pollination service requires further investigation.

Methods: We developed a pollination model that extends existing approaches by simulating both pollination flights and concurrent pollinator exposure to toxic pesticides, enabling the estimation of pesticide impacts on pollination services. We calculated pollination service and pollinator health for a set of artificial landscapes, which varied in the percentage of pollinator habitat and agriculture, in the clustering of these land uses, as well as in the pollinator mortality hazard arising from the pesticides applied on agriculture.

Results: Our results show that in landscapes with less than 10% habitat and highly toxic pesticides, pollination services are mostly safeguarded by compact patches of habitat, as this configuration shelters more habitat from pesticide exposure. With increasing habitat amount or with pesticide applications causing less than 50% mortality in pollinators, more dispersed patches of habitat achieve a better pollination service for the landscape. We further tested the effect of pesticide application for different foraging ranges in a more realistic land use scenario. For pollinators with shorter foraging ranges, pesticide exposure from the immediate surroundings determines the achieved pollination. For species with longer foraging ranges, the availability of resources and the application of pesticides at landscape scale controls the pollination.

Conclusion: Our study highlights the importance of assessing spatial configuration effects on pesticide exposure for local pollinators. By applying these insights, land managers can devise land use arrangements to protect pollinator habitats and establish buffer zones to support pollinator activity in pesticide-intensive landscapes. As current guidelines largely lack spatially-explicit measures, we suggest to direct future research and policies towards the underlying spatial processes and their facilitation on parcel, farm, and landscape scale.

Supplementary information: The online version contains supplementary material available at 10.1186/s13717-025-00587-z.

了解生境结构与农药授粉之间的相互作用:实现更好的景观管理。
背景:在集约利用的农业景观中,自然景观要素的恢复是提高野生传粉媒介丰度、多样性及其授粉服务的常用途径。然而,预定避难所中的传粉者在周围农田觅食时可能会接触到农用化学品。为了有效地设计生境恢复或农药减量等传粉媒介保护措施,需要进一步研究土地利用配置对农药暴露和授粉服务的影响。方法:我们开发了一个传粉模型,通过模拟传粉飞行和同时暴露于有毒农药的传粉者来扩展现有的方法,从而能够估计农药对传粉服务的影响。我们计算了一组人工景观的传粉服务和传粉者健康,这些景观在传粉者栖息地和农业的百分比、这些土地利用的聚类以及农业农药使用引起的传粉者死亡率方面存在差异。结果:在高毒农药浓度低于10%的景观中,密实的生境斑块保护了传粉服务,因为这种结构可以保护更多的生境免受农药暴露。随着栖息地数量的增加或农药使用导致传粉者死亡率低于50%,更分散的栖息地斑块为景观提供了更好的授粉服务。在更现实的土地利用情景中,我们进一步测试了不同取食范围施用农药的效果。对于觅食范围较短的传粉媒介,直接接触周围环境的农药决定了传粉的实现。对于觅食范围较长的物种,在景观尺度上,资源的可用性和农药的使用控制着授粉。结论:本研究强调了空间配置对农药暴露影响的重要性。通过应用这些见解,土地管理者可以设计土地利用安排,以保护传粉媒介的栖息地,并建立缓冲区,以支持农药密集地区的传粉媒介活动。由于目前的指导方针在很大程度上缺乏空间明确的措施,我们建议将未来的研究和政策导向潜在的空间过程及其在地块、农场和景观尺度上的促进。补充信息:在线版本包含补充资料,下载地址:10.1186/s13717-025-00587-z。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecological Processes
Ecological Processes Environmental Science-Ecological Modeling
CiteScore
8.50
自引率
4.20%
发文量
64
审稿时长
13 weeks
期刊介绍: Ecological Processes is an international, peer-reviewed, open access journal devoted to quality publications in ecological studies with a focus on the underlying processes responsible for the dynamics and functions of ecological systems at multiple spatial and temporal scales. The journal welcomes manuscripts on techniques, approaches, concepts, models, reviews, syntheses, short communications and applied research for advancing our knowledge and capability toward sustainability of ecosystems and the environment. Integrations of ecological and socio-economic processes are strongly encouraged.
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