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

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Bee diversity in crop fields is influenced by remotely-sensed nesting resources in surrounding permanent grasslands. / Carrié, Romain; Lopes, Maïlys; Ouin, Annie; Andrieu, Emilie.

I: Ecological Indicators, Vol. 90, 01.07.2018, s. 606-614.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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T1 - Bee diversity in crop fields is influenced by remotely-sensed nesting resources in surrounding permanent grasslands

AU - Carrié, Romain

AU - Lopes, Maïlys

AU - Ouin, Annie

AU - Andrieu, Emilie

PY - 2018/7/1

Y1 - 2018/7/1

N2 - 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.

AB - 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.

KW - Agricultural landscapes

KW - Ground nests

KW - Permanent grasslands

KW - Wild bees

U2 - 10.1016/j.ecolind.2018.03.054

DO - 10.1016/j.ecolind.2018.03.054

M3 - Article

VL - 90

SP - 606

EP - 614

JO - Ecological Indicators

JF - Ecological Indicators

SN - 1872-7034

ER -