Parasitoids indicate major climate-induced shifts in arctic communities

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Kankaanpaa , T , Vesterinen , E , Hardwick , B , Schmidt , N M , Andersson , T , Aspholm , P E , Barrio , I C , Beckers , N , Bety , J , Birkemoe , T , DeSiervo , M , Drotos , K H , Ehrich , D , Gilg , O , Gilg , V , Hein , N , Hoye , T T , Jakobsen , K M , Jodouin , C , Jorna , J , Kozlov , M , Kresse , J-C , Leandri-Breton , D-J , Lecomte , N , Loonen , M , Marr , P , Monckton , S K , Olsen , M , Otis , J-A , Pyle , M , Roos , R E , Raundrup , K , Rozhkova , D , Sabard , B , Sokolov , A , Sokolova , N , Solecki , A M , Urbanowicz , C , Villeneuve , C , Vyguzova , E , Zverev , V & Roslin , T 2020 , ' Parasitoids indicate major climate-induced shifts in arctic communities ' , Global Change Biology , vol. 26 , no. 11 , pp. 6276-6295 .

Title: Parasitoids indicate major climate-induced shifts in arctic communities
Author: Kankaanpaa, Tuomas; Vesterinen, Eero; Hardwick, Bess; Schmidt, Niels M.; Andersson, Tommi; Aspholm, Paul E.; Barrio, Isabel C.; Beckers, Niklas; Bety, Joel; Birkemoe, Tone; DeSiervo, Melissa; Drotos, Katherine H.; Ehrich, Dorothee; Gilg, Olivier; Gilg, Vladimir; Hein, Nils; Hoye, Toke T.; Jakobsen, Kristian M.; Jodouin, Camille; Jorna, Jesse; Kozlov, Mikhail; Kresse, Jean-Claude; Leandri-Breton, Don-Jean; Lecomte, Nicolas; Loonen, Maarten; Marr, Philipp; Monckton, Spencer K.; Olsen, Maia; Otis, Josee-Anne; Pyle, Michelle; Roos, Ruben E.; Raundrup, Katrine; Rozhkova, Daria; Sabard, Brigitte; Sokolov, Aleksandr; Sokolova, Natalia; Solecki, Anna M.; Urbanowicz, Christine; Villeneuve, Catherine; Vyguzova, Evgenya; Zverev, Vitali; Roslin, Tomas
Contributor organization: Research Centre for Ecological Change
Department of Agricultural Sciences
Spatial Foodweb Ecology Group
Date: 2020-11
Language: eng
Number of pages: 20
Belongs to series: Global Change Biology
ISSN: 1354-1013
Abstract: Climatic impacts are especially pronounced in the Arctic, which as a region is warming twice as fast as the rest of the globe. Here, we investigate how mean climatic conditions and rates of climatic change impact parasitoid insect communities in 16 localities across the Arctic. We focus on parasitoids in a widespread habitat,Dryasheathlands, and describe parasitoid community composition in terms of larval host use (i.e., parasitoid use of herbivorous Lepidoptera vs. pollinating Diptera) and functional groups differing in their closeness of host associations (koinobionts vs. idiobionts). Of the latter, we expect idiobionts-as being less fine-tuned to host development-to be generally less tolerant to cold temperatures, since they are confined to attacking hosts pupating and overwintering in relatively exposed locations. To further test our findings, we assess whether similar climatic variables are associated with host abundances in a 22 year time series from Northeast Greenland. We find sites which have experienced a temperature rise in summer while retaining cold winters to be dominated by parasitoids of Lepidoptera, with the reverse being true for the parasitoids of Diptera. The rate of summer temperature rise is further associated with higher levels of herbivory, suggesting higher availability of lepidopteran hosts and changes in ecosystem functioning. We also detect a matching signal over time, as higher summer temperatures, coupled with cold early winter soils, are related to high herbivory by lepidopteran larvae, and to declines in the abundance of dipteran pollinators. Collectively, our results suggest that in parts of the warming Arctic,Dryasis being simultaneously exposed to increased herbivory and reduced pollination. Our findings point to potential drastic and rapid consequences of climate change on multitrophic-level community structure and on ecosystem functioning and highlight the value of collaborative, systematic sampling effort.
Subject: Arctic
climate change
DNA barcoding
food webs
functional traits
host-parasitoid interactions
insect herbivory
1181 Ecology, evolutionary biology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: publishedVersion

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