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Research article - Peer-reviewed, 2022

Unravelling chironomid biodiversity response to climate change in subarctic lakes across temporal and spatial scales

Belle, Simon; Klaus, Frederika; Gonzalez Sagrario, Maria de los angeles; Vrede, Tobias; Goedkoop, Willem;

Abstract

We combined paleolimnological reconstructions and space-for-time substitutions to unravel chironomid biodiversity responses to climate change in subarctic mountains across temporal and spatial scales. Using sediment records, we found that long-term temporal changes in chironomid taxonomic diversity were mainly induced by the temperature tolerance/optimum of species, while little changes in functional diversity were found due to the replacement of similar functional-type taxa within the community. Overall, paleolimnological reconstructions suggested the selection of larger chironomid species by long-term climate cooling and little changes in trophic guilds. Space-for-time substitutions showed, however that low-elevation lakes with forested have more sediment-feeding taxa and larger larvae than high-elevation lakes, thus, suggesting the selection of large chironomid morphotypes with a sediment-feeding mode under warmer climate. Space-for-time substitutions and paleolimnological reconstructions, therefore, gave contrasting results for the link between climate and functional diversity of chironomid communities, likely because space-for-time substitutions failed to match the extent of both spatial and temporal climatic gradients. We suggest that future studies must address biodiversity issues across both temporal and spatial scales as an improved understanding of biodiversity responses to climate change may help us to understand how biodiversity will be affected by ongoing and future change.

Keywords

Global change; Subfossil chironomid; Functional traits; Lake sediments

Published in

Hydrobiologia

2022, volume: 849, number: 11, pages: 2621-2633
Publisher: SPRINGER

Authors' information

Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Klaus, Frederika
No organisation
Gonzalez Sagrario, Maria de los angeles
National University of Mar del Plata
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment

UKÄ Subject classification

Ecology

Publication Identifiers

DOI: https://doi.org/10.1007/s10750-022-04890-0

URI (permanent link to this page)

https://res.slu.se/id/publ/117260