Agriculturally dominated landscapes reduce bee phylogenetic diversity and pollination services

Agriculturally driven land use change threatens global biodiversity and has the potential to reshape the tree of life by favoring the persistence of some lineages over others. Yet it is unclear if loss of phylogenetic diversity compromises the delivery of ecosystem services. To address this critical knowledge gap, we combine extensive land cover, pollinator survey and crop data with a complete time-calibrated phylogenomic tree for this diverse bee community. Pollinator communities in highly agricultural landscapes contain 230 million fewer years of evolutionary history and loss of pollinator phylogenetic diversity was strongly associated with reduced crop yield and quality. Our study is the first to link landscape mediated changes in the phylogenetic structure of natural communities to the disruption of ecosystem services. Practices that measure their success only by the number of species conserved may fail to protect the full diversity of life impacted by these stressors.

农业驱动的土地利用变化威胁着全球生物多样性，并有可能通过偏爱某些谱系的持续存在而重塑生命之树。然而，尚不清楚谱系多样性的丧失是否会损害生态系统服务的提供。为了填补这一关键的知识空白，我们将广泛的地表覆盖、授粉者调查和农作物数据与该多样化蜜蜂群落完整的时间校准系统发育树相结合。高度农业景观中的授粉者群落含有2.3亿年更少的进化历史，授粉者系统发育多样性的丧失与农作物产量和质量下降密切相关。我们的研究首次将景观介导的自然群落系统发育结构的变化与生态系统服务的破坏联系起来。仅以物种保存数量来衡量其成功的做法，可能无法保护受这些压力因素影响的生命多样性的全部。