Weed diversity is driven by complex interplay between multi-scale dispersal and local filtering.

ABSTRACT: Arable weeds are key organisms for biodiversity maintenance and ecosystem service provision in agroecosystems. Disentangling the drivers of weed diversity is critical to counteract the global decline of farmland biodiversity. Even if distinct scale-dependent processes were alternatively proposed, no general framework unifying the multi-scale drivers of weed dynamics has yet emerged. Here, we investigate the joint effects of field- and landscape-scale processes on weed assemblages in 444 arable fields. First, field margins sheltered greater weed diversity than field core, evidencing their role as biodiversity refugia. Second, community similarity between field core and margin decreased with the distance to margin, highlighting a major role of local dispersal. Third, weed diversity at field

SUBMITTER: Bourgeois B 

PROVIDER: S-EPMC7423473 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature