Can reindeer husbandry management slow down the shrubification of the Arctic?

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:267

Article

Verma, Megha^1,2  Buehne, Henrike Schulte To²  Lopes, Mailys²  Ehrich, Dorothee³  Sokovnina, Svetlana⁴  Hofhuis, Stijn P.⁵  Pettorelli, Nathalie² 

[1] Imperial Coll London, Dept Life Sci, Buckhurst Rd, Ascot SL5 7PY, Berks, England

[2] Zool Soc London, Inst Zool, Regents Pk, London NW1 4RY, England

[3] UiT Arctic Univ Tromso, Dept Arctic & Marine Biol, N-9037 Tromso, Norway

[4] Russian Acad Sci, Arctic Res Stn, Inst Plant & Anim Ecol, Ural Branch, Zelenaya Gorka 21, Labytnangi 629400, Yamal Nenets Au, Russia

[5] Wageningen Univ, Resource Ecol Grp, Droevendaalsesteeg 3a, NL-6708 PB Wageningen, Netherlands

关键词: Satellite remote sensing;    Arctic;    Tundra;    Shrubification;    Climate change;    Grazing;    Semi-domesticated reindeer;   

DOI  :  10.1016/j.jenvman.2020.110636

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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