Abstract：
:Rapid climate change is threatening the stability and functioning of Arctic ecosystems. As the Arctic warms, shrubs have been widely observed to expand, which has potentially serious consequences for global climate regulation and for the ecological processes characterising these ecosystems. However, it is currently unclear why this shrubification has been spatially uneven across the Arctic, with herbivory being suggested as a key regulating factor. By taking advantage of freely available satellite imagery spanning three decades, we mapped changes in shrub cover in the Yamal Peninsula and related these to changes in summer temperature and reindeer population size. We found no evidence that shrubs had expanded in the study site, despite increasing summer temperatures. At the same time, herbivore pressure increased significantly, with the local reindeer population size growing by about 75%. Altogether, our results thus point towards increases in large herbivore pressure having compensated for the warming of the Peninsula, halting the shrubification of the area. This suggests that strategic semi-domesticated reindeer husbandry, which is a common practice across the Eurasian Arctic, could represent an efficient environmental management strategy for maintaining open tundra landscapes in the face of rapid climate change.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Verma M,Schulte To Bühne H,Lopes M,Ehrich D,Sokovnina S,Hofhuis SP,Pettorelli Ndoi
10.1016/j.jenvman.2020.110636subject
Has Abstractpub_date
2020-08-01 00:00:00pages
110636eissn
0301-4797issn
1095-8630pii
S0301-4797(20)30568-5journal_volume
267pub_type
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