期刊论文详细信息
Frontiers in Ecology and Evolution
Macroinvertebrate traits in Arctic streams reveal latitudinal patterns in physiology and habits that are strongly linked to climate
Ecology and Evolution
Jennifer Lento1  Danny C. P. Lau2  Willem Goedkoop2  Joseph M. Culp3  John E. Brittain4 
[1] Canadian Rivers Institute and Department of Biology, University of New Brunswick, Fredericton, NB, Canada;Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden;Department of Biology and Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, ON, Canada;Department of Supervision and Contingency Planning, Norwegian Water Resources and Energy Directorate, Oslo, Norway;Natural History Museum, University of Oslo, Oslo, Norway;
关键词: Arctic;    freshwater;    functional trait;    benthic macroinvertebrate;    diversity;    climate change;    stream;    temperature;   
DOI  :  10.3389/fevo.2023.1209612
 received in 2023-04-21, accepted in 2023-07-21,  发布年份 2023
来源: Frontiers
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【 摘 要 】

IntroductionArctic freshwater ecosystems are undergoing rapid environmental transformation because of climate change, which is predicted to produce fundamental alterations in river community structure and function.MethodsWe explored how climate change affects benthic invertebrate communities of Arctic streams by examining patterns of their biological traits along latitudinal and climatic gradients in eastern North America (Canada) and northwestern Europe (Sweden, Norway).ResultsDespite differences in taxonomic composition between continents, we identified similarities in the functional trait niche (FTN) of predominant macroinvertebrate taxonomic groups. Trait composition differed by latitude in eastern Canada, with a predominance of cold-tolerant taxa, tubular body shape, and cased and attached habits at the highest latitudes. Differences in trait composition were evident among ecoregions in Europe, with trait dominance at the highest latitudes that was comparable to North America. There was a similar increase in the relative abundance of cold tolerance and tubular body shape and a decrease in obligate shredders and trait richness with decreasing temperatures across both continents.DiscussionThese patterns are indicative of FTNs that include physiological traits and habits that are advantageous for the low temperatures, short ice-free period, and low riparian vegetation cover at the highest latitudes. We predict that climate change will lead to an increase in functional diversity at high latitudes, as organisms with trait modalities that are currently only found at lower latitudes move northward. However, this change in trait composition will be mediated by the effect of spatial connectivity on dispersal ability, with slower change occurring on Arctic islands. These findings can support modelling of future change in Arctic freshwater assemblages in response to ongoing climate change.

【 授权许可】

Unknown   
Copyright © 2023 Lento, Lau, Brittain, Culp and Goedkoop

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