Agri-environment schemes enhance pollinator richness and abundance but bumblebee reproduction depends on field size

0525346 - BC 2021 RIV US eng J - Článek v odborném periodiku
Geppert, C. - Haas, A. - Földesi, R. - Donkó, B. - Akter, Asma - Tscharntke, T. - Batáry, P.
Agri-environment schemes enhance pollinator richness and abundance but bumblebee reproduction depends on field size.
Journal of Applied Ecology. Roč. 57, č. 9 (2020), s. 1818-1828. ISSN 0021-8901. E-ISSN 1365-2664
Institucionální podpora: RVO:60077344
Klíčová slova: configurational heterogeneity * edge effects * field size
Obor OECD: Ecology
Impakt faktor: 6.528, rok: 2020
Způsob publikování: Omezený přístup
https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.13682

Pollinators are facing worldwide decline and many countries have introduced environment schemes (AES) to counteract this ongoing trend. But the importance of AES in ecosystem function and biodiversity is still little understood and might be context-dependent. In our study, we compared the effectiveness of organic farming and flower strips, the two most popular
AES schemes in Germany, on pollinator diversity and flower resources. We selected nine landscapes along a gradient of increasing field size, each with a triplet of winter wheat fields: organic, conventional with flower strip, and conventional without flower strip as control and surveyed insect-pollinated plants and pollinators. Additionally, we placed bumblebee
colonies in the field edges to monitor their growth (colony weight gain) and reproduction (queen production). Flower strips supported the highest abundance and richness of pollinators but bumblebee colony growth and plant richness benefited equally from organic and flower strip schemes. At the landscape scale, smaller fields had a positive effect on plant richness and bumblebee reproduction in flower strips, but bumblebee colonies in organic agriculture benefited most from large fields with higher flower resources than the narrow flower strips. Our results showed that both local and landscape management shaped pollinator communities and their reproduction. Overall, organic farming and flower strips appeared to be effective tools
to mitigate flower shortage in conventional cereal fields, with organic farming supporting the highest flowering plant cover per field. Flower strips enhanced local pollinator richness most but increased bumblebee reproduction only when the surrounding landscapes had small fields with long field borders. We conclude that European Union policies need to také into account that the effectiveness of agri-environment schemes depends on the structure of the surrounding landscape.
Trvalý link: http://hdl.handle.net/11104/0316791