Crop diversity benefits carabid and pollinator communities in landscapes with semi‐natural habitats
2020
Aguilera, Guillermo | Roslin, Tomas | Miller, Kirsten | Tamburini, Giovanni | Birkhofer, Klaus | Caballero‐lópez, Berta | Lindström, Sandra Ann‐marie | Öckinger, Erik | Rundlöf, Maj | Rusch, Adrien | Smith, Henrik G. | Bommarco, Riccardo | Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) | Università degli studi di Bari Aldo Moro = University of Bari Aldo Moro (UNIBA) | Department of Ecology, Brandenburg University of Technology | Natural Sciences Museum of Barcelona | Skane University Hospital [Lund] | Swedish Rural Economy and Agricultural Society | Santé et agroécologie du vignoble (UMR SAVE) ; Université de Bordeaux (UB)-Institut des Sciences de la Vigne et du Vin (ISVV)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
International audience
显示更多 [+] 显示较少 [-]英语. 1. In agricultural landscapes, arthropods provide essential ecosystem services such as biological pest control and pollination. Intensified crop management practices and homogenization of landscapes have led to declines among such organisms. Semi-natural habitats, associated with high numbers of these organisms, are increasingly lost from agricultural landscapes but diversification by increasing crop diversity has been proposed as a way to reverse observed arthropod declines and thus restore ecosystem services. However, whether or not an increase in the diversity of crop types within a landscape promotes diversity and abundances of pollinating and predaceous arthropods, and how semi-natural habitats might modify this relationship, are not well understood. 2. To test how crop diversity and the proportion of semi-natural habitats within a landscape are related to the diversity and abundance of beneficial arthropod communities , we collected primary data from seven studies focusing on natural enemies (carabids and spiders) and pollinators (bees and hoverflies) from 154 crop fields in Southern Sweden between 2007 and 2017. 3. Crop diversity within a 1-km radius around each field was positively related to the Shannon diversity index of carabid and pollinator communities in landscapes rich in semi-natural habitats. Abundances were mainly affected by the proportion of semi-natural habitats in the landscape, with decreasing carabid and increasing pollinator numbers as the proportion of this habitat type increased. Spiders showed no response to either crop diversity or the proportion of semi-natural habitats.
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