globalchange  > 全球变化的国际研究计划
DOI: 10.1111/gcb.14748
WOS记录号: WOS:000478342900001
论文题名:
High ecosystem stability of evergreen broadleaf forests under severe droughts
作者: Huang, Kun1,2; Xia, Jianyang1,3
通讯作者: Xia, Jianyang
刊名: GLOBAL CHANGE BIOLOGY
ISSN: 1354-1013
EISSN: 1365-2486
出版年: 2019
卷: 25, 期:10, 页码:3494-3503
语种: 英语
英文关键词: droughts ; ecosystem stability ; Enhanced Vegetation Index ; evergreen broadleaf forests ; resilience ; resistance
WOS关键词: CARBON-CYCLE ; CLIMATE-CHANGE ; DRY-SEASON ; PHOTOSYNTHETIC SEASONALITY ; VEGETATION PRODUCTIVITY ; SEMIARID ECOSYSTEMS ; TIME-SCALES ; CO2 ; BIODIVERSITY ; SENSITIVITY
WOS学科分类: Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向: Biodiversity & Conservation ; Environmental Sciences & Ecology
英文摘要:

Global increase in drought occurrences threatens the stability of terrestrial ecosystem functioning. Evergreen broadleaf forests (EBFs) keep leaves throughout the year, and therefore could experience higher drought risks than other biomes. However, the recent temporal variability of global vegetation productivity or land carbon sink is mainly driven by non-evergreen ecosystems, such as semiarid grasslands, croplands, and boreal forests. Thus, we hypothesize that EBFs have higher stability than other biomes under the increasingly extreme droughts. Here we use long-term Standardized Precipitation and Evaporation Index (SPEI) data and satellite-derived Enhanced Vegetation Index (EVI) products to quantify the temporal stability (ratio of mean annual EVI to its SD), resistance (ability to maintain its original levels during droughts), and resilience (rate of EVI recovering to pre-drought levels) at biome and global scales. We identified significantly increasing trends of annual drought severity (SPEI range: -0.08 to -1.80), area (areal fraction range: 2%-19%), and duration (month range: 7.9-9.1) in the EBF biome over 2000-2014. However, EBFs showed the highest resistance of EVI to droughts, but no significant differences in resilience of EVI to droughts were found among biomes (forests, grasslands, savannas, and shrublands). Global resistance and resilience of EVI to droughts were largely affected by temperature and solar radiation. These findings suggest that EBFs have higher stability than other biomes despite the greater drought exposure. Thus, the conservation of EBFs is critical for stabilizing global vegetation productivity and land carbon sink under more-intense climate extremes in the future.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/143803
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.East China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Sch Ecol & Environm Sci, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China
2.East China Normal Univ, Ctr Global Change & Ecol Forecasting, Shanghai, Peoples R China
3.Inst Ecochongming, Shanghai, Peoples R China

Recommended Citation:
Huang, Kun,Xia, Jianyang. High ecosystem stability of evergreen broadleaf forests under severe droughts[J]. GLOBAL CHANGE BIOLOGY,2019-01-01,25(10):3494-3503
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