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Restoration of transborder connectivity for Fennoscandian brown bears (Ursus arctos)

Kopatz, Alexander and Kleven, Oddmund and Kojola, Ilpo and Aspi, Jouni and Norman, Anita and Spong, Göran and Gyllenstrand, Niclas and Dalen, Love and Floystad, Ida and Hagen, Snorre B. and Kindberg, Jonas and Flagstad, Oystein (2021). Restoration of transborder connectivity for Fennoscandian brown bears (Ursus arctos). Biological Conservation. 253 , 108936
[Research article]

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Abstract

Knowledge about the connectivity among natural populations is essential to identify management units for effective conservation actions. Conservation-minded management has led to the recovery of large carnivore populations in northern Europe, possibly restoring connectivity between the two separated, but expanding brown bear (Ursus arctos) populations on the Scandinavian peninsula to the west and Karelia, a part of the large Eurasian population, to the east. The degree of connectivity between these populations has been poorly understood, therefore we investigated the extent of connectivity between the two populations using autosomal microsatellites and Y chromosome haplotypes in 924 male bears (the dispersing sex), sampled during a period of 12 years (2005-2017) across the transborder area where these two populations meet. Our results showed that the two populations are not genetically isolated as reported in earlier studies. We detected recent asymmetrical gene flow at a rate (individuals per generation) of 4.6-5.5 (1%) from Karelia into Scandinavia, whereas the rate was approximately 27.1-34.5 (8%) in the opposite direction. We estimated historical gene flow of effective number of migrants to be between 1.7 and 2.5 between the populations. Analyses of Y chromosome markers supported these results. Successful recovery and expansion of both populations led to the restoration of connectivity, however, it is asymmetric, possibly due to different recovery histories and population densities. By aligning monitoring between neighboring countries, we were able to better understand the biological processes across the relevant spatial scale.

Authors/Creators:Kopatz, Alexander and Kleven, Oddmund and Kojola, Ilpo and Aspi, Jouni and Norman, Anita and Spong, Göran and Gyllenstrand, Niclas and Dalen, Love and Floystad, Ida and Hagen, Snorre B. and Kindberg, Jonas and Flagstad, Oystein
Title:Restoration of transborder connectivity for Fennoscandian brown bears (Ursus arctos)
Series Name/Journal:Biological Conservation
Year of publishing :2021
Volume:253
Article number:108936
Number of Pages:9
Publisher:ELSEVIER SCI LTD
ISSN:0006-3207
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Brown bear, Genetic structure, Male gene flow, Microsatellites, Migration, Recovery, Ursus arctos, Wildlife monitoring, Y chromosome
URN:NBN:urn:nbn:se:slu:epsilon-p-110967
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110967
Additional ID:
Type of IDID
DOI10.1016/j.biocon.2020.108936
Web of Science (WoS)000609483300011
ID Code:22725
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:09 Mar 2021 14:03
Metadata Last Modified:09 Mar 2021 14:11

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