气候变化领域集成服务门户(CCPortal): Strong shrub expansion in tundra-taiga, tree infilling in taiga and stable tundra in central Chukotka (north-eastern Siberia) between 2000 and 2017

CCPortal

DOI	10.1088/1748-9326/ab9059
	Strong shrub expansion in tundra-taiga, tree infilling in taiga and stable tundra in central Chukotka (north-eastern Siberia) between 2000 and 2017
	Shevtsova I.; Heim B.; Kruse S.; Schröder J.; Troeva E.I.; Pestryakova L.A.; Zakharov E.S.; Herzschuh U.
发表日期	2020
ISSN	17489318
卷号	15 期号:8
英文摘要	Vegetation is responding to climate change, which is especially prominent in the Arctic. Vegetation change is manifest in different ways and varies regionally, depending on the characteristics of the investigated area. Although vegetation in some Arctic areas has been thoroughly investigated, central Chukotka (NE Siberia) with its highly diverse vegetation, mountainous landscape and deciduous needle-leaf treeline remains poorly explored, despite showing strong greening in remote-sensing products. Here we quantify recent vegetation compositional changes in central Chukotka over 15 years between 2000/2001/2002 and 2016/2017. We numerically related field-derived information on foliage projective cover (percentage cover) of different plant taxa from 52 vegetation plots to remote-sensing derived (Landsat) spectral indices (Normalised Difference Vegetation Index (NDVI), Normalised Difference Water Index (NDWI) and Normalised Difference Snow Index (NDSI)) using constrained ordination. Clustering of ordination scores resulted in four land-cover classes: (1) larch closed-canopy forest, (2) forest tundra and shrub tundra, (3) graminoid tundra and (4) prostrate herb tundra and barren areas. We produced land-cover maps for early (2000, 2001 or 2002) and recent (2016 or 2017) time-slices for four focus regions along the tundra-taiga vegetation gradient. Transition from graminoid tundra to forest tundra and shrub tundra is interpreted as shrubification and amounts to 20% area increase in the tundra-taiga zone and 40% area increase in the northern taiga. Major contributors of shrubification are alder, dwarf birch and some species of the heather family. Land-cover change from the forest tundra and shrub tundra class to the larch closed-canopy forest class is interpreted as tree infilling and is notable in the northern taiga. We find almost no land-cover changes in the present treeless tundra. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	land-cover classification; Landsat spectral indices; shrubification; Siberia; tree infilling; vegetation change
语种	英语
scopus关键词	Climate change; Forestry; Remote sensing; Vegetation; Compositional changes; Foliage projective covers; Land cover maps; Land-cover change; Normalised difference vegetation index; Spectral indices; Vegetation change; Vegetation plots; Landforms; boreal forest; climate change; land cover; Landsat; range expansion; shrub; treeline; tundra; vegetation cover; vegetation dynamics; Chukchi; Russian Federation; Alnus; Betula nana; Calluna; Larix
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153865
作者单位	Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, Alfred Wegener Institute (AWI), Germany; Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam, 14476, Germany; Institute for Biological problems of the Cryolithozone, Russian Academy of Sciences, Siberian Branch, Yakutsk, Russian Federation; Institute of Natural Sciences, North-Eastern Federal University of Yakutsk, Yakutsk, 677000, Russian Federation; Institute of Environmental Sciences and Geography, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam, 14476, Germany
推荐引用方式 GB/T 7714	Shevtsova I.,Heim B.,Kruse S.,et al. Strong shrub expansion in tundra-taiga, tree infilling in taiga and stable tundra in central Chukotka (north-eastern Siberia) between 2000 and 2017[J],2020,15(8).
APA	Shevtsova I..,Heim B..,Kruse S..,Schröder J..,Troeva E.I..,...&Herzschuh U..(2020).Strong shrub expansion in tundra-taiga, tree infilling in taiga and stable tundra in central Chukotka (north-eastern Siberia) between 2000 and 2017.Environmental Research Letters,15(8).
MLA	Shevtsova I.,et al."Strong shrub expansion in tundra-taiga, tree infilling in taiga and stable tundra in central Chukotka (north-eastern Siberia) between 2000 and 2017".Environmental Research Letters 15.8(2020).