Bee diversity in crop fields is influenced by remotely-sensed nesting resources in surrounding permanent grasslands

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Landscape heterogeneity is an important driver of biodiversity in agroecosystems. However, the functional heterogeneity of agricultural landscapes, taking into account the different resources that habitat patches can provide to species, has rarely been studied. In this study, we explored the effect of landscape-scale nest availability provided by permanent grasslands on wild bee communities. Wild bees were sampled in 43 cereal fields in south-western France differing in the surrounding proportion of permanent grasslands. Using remote sensing tools, we measured two parameters of grassland structure known to locally influence bee nest density (slope and proportion of sparse vegetation). We found that mean slope of surrounding grasslands was the factor that most positively influenced bee richness, abundance and trait distribution in bee communities. We also found that mean slope of surrounding grasslands had a better predictive power of bee community structure than the proportion of permanent grasslands. Ground-nesting species, species with high dispersal capacities and species with a generalist diet were positively affected by the availability of sloped ground in the surrounding permanent grasslands. Only bee species with specialized flower requirements responded positively to the proportion of sparse vegetation in grasslands. Our results suggest that landscape-scale availability of nesting resources provided by grasslands affects bee communities in agricultural landscapes and can help sustain functionally diverse bee assemblages. Using simple remote sensing tools, this study highlights the importance of considering nesting resources in agricultural landscapes to maintain wild bee diversity in farmlands.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Toulouse
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Miljö- och naturvårdsvetenskap
  • Ekologi

Nyckelord

Originalspråkengelska
Sidor (från-till)606-614
Antal sidor9
TidskriftEcological Indicators
Volym90
StatusPublished - 2018 jul 1
PublikationskategoriForskning
Peer review utfördJa