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Circumpolar patterns of Arctic freshwater fish biodiversity: A baseline for monitoring

Laske, Sarah M. and Amundsen, Per-Arne and Christoffersen, Kirsten S. and Erkinaro, Jaakko and Gudbergsson, Gudni and Hayden, Brian and Heino, Jani and Holmgren, Kerstin and Kahilainen, Kimmo K. and Lento, Jennifer and Orell, Panu and Östergren, Johan and Power, Michael and Rafikov, Ruslan and Romakkaniemi, Atso and Svenning, Martin-A. and Swanson, Heidi and Whitman, Matthew and Zimmerman, Christian E. (2022). Circumpolar patterns of Arctic freshwater fish biodiversity: A baseline for monitoring. Freshwater Biology. 67 , 176-193
[Research article]

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Abstract

Climate change, biological invasions, and anthropogenic disturbance pose a threat to the biodiversity and function of Arctic freshwater ecosystems. Understanding potential changes in fish species distribution and richness is necessary, given the great importance of fish to the function of freshwater ecosystems and as a resource to humans. However, information gaps limit large-scale studies and our ability to determine patterns and trends in space and time. This study takes the first step in determining circumpolar patterns of fish species richness and composition, which provides a baseline to improve both monitoring and conservation of Arctic freshwater biodiversity. Information on species presence/absence was gathered from the Circumpolar Biodiversity Monitoring Program's Freshwater Database and used to examine patterns of freshwater fish gamma-, alpha-, and beta-diversity across 234 degrees of longitude in the Arctic. The metrics of diversity provided information on species richness and composition across hydrobasins, ecoregions, and Arctic zones. Circumpolar patterns of fish species biodiversity varied with latitude, isolation, and coarse ecoregion characteristics; patterns were consistent with historic and contemporary barriers to colonisation and environmental characteristics. Gamma-diversity was lower in the high Arctic compared to lower latitude zones, but alpha-diversity did not decrease with increasing latitude below 71 degrees N, reflecting glacial history. Alpha-diversity was reduced to a single species, Arctic charr Salvelinus alpinus, in ecoregions above 71 degrees N, where gamma-diversity was the lowest. Beta-diversity indicated little variation in the composition and richness of species across the High Arctic; at lower latitudes, ecoregions contained more species, although species composition turned over across large spatial extents. In an analysis of five ecoregions in the circumpolar Arctic, physical isolation, and ecoregion area and topography were identified as strong drivers of gamma-, alpha-, and beta-diversity. Physical isolation reduced the gamma- and alpha-diversity, and changes in beta-diversity between adjacent locations were due mainly to losses in species richness, rather than due to differences in species composition. Heterogeneity of habitats, environmental gradients, and geographic distance probably contributed to patterns of fish dissimilarity within and across ecoregions. This study presents the first analysis of large-scale patterns of freshwater fish biodiversity in the circumpolar Arctic. However, information gaps in space, time, and among taxonomic groups remain. Future inclusion of extensive archive and new data will allow future studies to test for changes and drivers of the observed patterns of biodiversity. This is important given the potential impacts of ongoing and accelerating climate change, land use, and biotic exchange on Arctic fish biodiversity.

Authors/Creators:Laske, Sarah M. and Amundsen, Per-Arne and Christoffersen, Kirsten S. and Erkinaro, Jaakko and Gudbergsson, Gudni and Hayden, Brian and Heino, Jani and Holmgren, Kerstin and Kahilainen, Kimmo K. and Lento, Jennifer and Orell, Panu and Östergren, Johan and Power, Michael and Rafikov, Ruslan and Romakkaniemi, Atso and Svenning, Martin-A. and Swanson, Heidi and Whitman, Matthew and Zimmerman, Christian E.
Title:Circumpolar patterns of Arctic freshwater fish biodiversity: A baseline for monitoring
Series Name/Journal:Freshwater Biology
Year of publishing :2022
Volume:67
Page range:176-193
Number of Pages:19
Publisher:WILEY
ISSN:0046-5070
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:beta-diversity, dissimilarity, distribution, richness, spatial scale
URN:NBN:urn:nbn:se:slu:epsilon-p-102383
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-102383
Additional ID:
Type of IDID
DOI10.1111/fwb.13405
Web of Science (WoS)000491072200001
ID Code:26810
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:24 Jan 2022 12:25
Metadata Last Modified:24 Jan 2022 14:33

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