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Effect of green infrastructure on restoration of pollination networks and plant performance in semi-natural dry grasslands across Europe

Traveset, Anna (författare)
Lara-Romero, Carlos (författare)
Santamaría, Silvia (författare)
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Escribano-Ávila, Gema (författare)
Bullock, James M. (författare)
Honnay, Olivier (författare)
Hooftman, Danny A. P. (författare)
Kimberley, Adam, 1989- (författare)
Stockholms universitet,Institutionen för naturgeografi
Krickl, Patricia (författare)
Plue, Jan, 1982- (författare)
Stockholms universitet,Institutionen för naturgeografi,KU Leuven, Belgium
Poschlod, Peter (författare)
Cousins, Sara A. O., 1965- (författare)
Stockholms universitet,Institutionen för naturgeografi
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 (creator_code:org_t)
2024
2024
Engelska.
Ingår i: Journal of Applied Ecology. - 0021-8901 .- 1365-2664.
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Agricultural intensification, afforestation and land abandonment are major drivers of biodiversity loss in semi-natural grasslands across Europe. Reversing these losses requires the reinstatement of plant–animal interactions such as pollination. Here we assessed the differences in species composition and patterns of plant-pollinator interactions in ancient and restored grasslands and how these patterns are influenced by landscape connectivity, across three European regions (Belgium, Germany and Sweden).We evaluated the differences in pollinator community assemblage, abundance and interaction network structure between 24 ancient and restored grasslands. We then assessed the effect of surrounding landscape functional connectivity (i.e. green infrastructure, GI) on these variables and tested possible consequences on the reproduction of two model plants, Lotus corniculatus and Salvia pratensis.Neither pollinator richness nor species composition differed between ancient and restored grasslands. A high turnover of interactions across grasslands was detected but was mainly due to replacement of pollinator and plant species. The impact of grassland restoration was consistent across various pollinator functional groups, whereas the surrounding GI had differential effects. Notably, bees, butterflies, beetles, and dipterans (excluding hoverflies) exhibited the most significant responses to GI variations. Interestingly, networks in restored grasslands were more specialised (i.e. less functionally redundant) than in ancient ones and also showed a higher number of insect visits to habitat-generalist plant species. Landscape connectivity had a similar effect, with habitat-specialist plant species receiving fewer visits at higher GI values.Fruit set in S. pratensis and L. corniculatus was unaffected by grassland type or GI. However, the fruit set in the specialist S. pratensis increased with the number of pollinator visits, indicating a positive correlation between pollinator activity and reproductive success in this particular species.Synthesis and applications. Our findings provide evidence of the necessity to enhance ecosystem functions while avoiding biotic homogenisation. Restoration programs should aim at increasing landscape connectivity which influences plant communities, pollinator assemblages and their interaction patterns. To avoid generalist species taking over from specialists in restored grasslands, we suggest reinforcing the presence of specialist species in the latter, for instance by means of introductions, as well as increasing the connectivity to source populations.

Ämnesord

NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

Nyckelord

functional connectivity
grassland restoration
habitat quality
land-use change
plant reproductive success
plant-pollinator interactions
species richness
trophic interactions

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

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