globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13409
论文题名:
Savanna woody encroachment is widespread across three continents
作者: Stevens N.; Lehmann C.E.R.; Murphy B.P.; Durigan G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:1
起始页码: 235
结束页码: 244
语种: 英语
英文关键词: allometry ; CO 2 ; deciduousness ; fire suppression ; forest expansion ; land-use change ; N-fixation ; woody encroachment ; woody vegetation change
Scopus关键词: allometry ; carbon dioxide ; deciduous forest ; expansion ; forest fire ; global change ; land use change ; nitrogen fixation ; savanna ; woody plant ; Africa ; Australia ; South America
英文摘要: Tropical savannas are a globally extensive biome prone to rapid vegetation change in response to changing environmental conditions. Via a meta-analysis, we quantified savanna woody vegetation change spanning the last century. We found a global trend of woody encroachment that was established prior the 1980s. However, there is critical regional variation in the magnitude of encroachment. Woody cover is increasing most rapidly in the remaining uncleared savannas of South America, most likely due to fire suppression and land fragmentation. In contrast, Australia has experienced low rates of encroachment. When accounting for land use, African savannas have a mean rate annual woody cover increase two and a half times that of Australian savannas. In Africa, encroachment occurs across multiple land uses and is accelerating over time. In Africa and Australia, rising atmospheric CO2, changing land management and rainfall are likely causes. We argue that the functional traits of each woody flora, specifically the N-fixing ability and architecture of woody plants, are critical to predicting encroachment over the next century and that African savannas are at high risk of widespread vegetation change. © 2016 John Wiley & Sons Ltd
资助项目: BM was supported by a grant from the Australian Research Council (DE130100434). GD thanks the Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq, for the productivity grant (≠303402/2012-1).
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被引频次[WOS]:420   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61116
Appears in Collections:影响、适应和脆弱性

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作者单位: Fynbos Node, South African Environmental Observation Network (SAEON), Cape Town, South Africa; Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch, South Africa; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia; Floresta Estadual de Assis, Instituto Florestal, Assis, SP, Brazil

Recommended Citation:
Stevens N.,Lehmann C.E.R.,Murphy B.P.,et al. Savanna woody encroachment is widespread across three continents[J]. Global Change Biology,2017-01-01,23(1)
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