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Long-Term Trends and Role of Climate in the Population Dynamics of Eurasian Reindeer
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
(Arcum)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Plant Biology and Nature Management, Vrije Universiteit Brussel, Brussels, Belgium. (Arcum)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
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2016 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, no 6, e0158359Article in journal (Refereed) Published
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Abstract [en]

Temperature is increasing in Arctic and sub-Arctic regions at a higher rate than anywhere else in the world. The frequency and nature of precipitation events are also predicted to change in the future. These changes in climate are expected, together with increasing human pressures, to have significant impacts on Arctic and sub-Arctic species and ecosystems. Due to the key role that reindeer play in those ecosystems, it is essential to understand how climate will affect the region's most important species. Our study assesses the role of climate on the dynamics of fourteen Eurasian reindeer (Rangifer tarandus) populations, using for the first time data on reindeer abundance collected over a 70-year period, including both wild and semi-domesticated reindeer, and covering more than half of the species' total range. We analyzed trends in population dynamics, investigated synchrony among population growth rates, and assessed the effects of climate on population growth rates. Trends in the population dynamics were remarkably heterogeneous. Synchrony was apparent only among some populations and was not correlated with distance among population ranges. Proxies of climate variability mostly failed to explain population growth rates and synchrony. For both wild and semi-domesticated populations, local weather, biotic pressures, loss of habitat and human disturbances appear to have been more important drivers of reindeer population dynamics than climate. In semi-domesticated populations, management strategies may have masked the effects of climate. Conservation efforts should aim to mitigate human disturbances, which could exacerbate the potentially negative effects of climate change on reindeer populations in the future. Special protection and support should be granted to those semi-domesticated populations that suffered the most because of the collapse of the Soviet Union, in order to protect the livelihood of indigenous peoples that depend on the species, and the multi-faceted role that reindeer exert in Arctic ecosystems.

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2016. Vol. 11, no 6, e0158359
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Ecology
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URN: urn:nbn:se:umu:diva-124235DOI: 10.1371/journal.pone.0158359ISI: 000378865200063OAI: oai:DiVA.org:umu-124235DiVA: diva2:950215
Available from: 2016-07-28 Created: 2016-07-28 Last updated: 2017-11-28Bibliographically approved

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Uboni, AlessiaHorstkotte, TimKaarlejärvi, ElinaOlofsson, JohanMoen, Jon
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