DOI: 10.1111/gcb.12362
论文题名: Consistent response of vegetation dynamics to recent climate change in tropical mountain regions
作者: Krishnaswamy J. ; John R. ; Joseph S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 1 起始页码: 203
结束页码: 215
语种: 英语
英文关键词: Bayesian dynamic models
; Browning
; Climate change
; Greening
; Normalized Difference Vegetation Index
; Phenology
; Tropical mountains
Scopus关键词: Bayesian analysis
; biodiversity
; climate change
; climate effect
; ecosystem response
; global change
; mountain region
; NDVI
; phenology
; protected area
; tropical region
; vegetation cover
; rain
; altitude
; article
; Bayesian dynamic models
; browning
; climate change
; ecosystem
; greening
; Normalized Difference Vegetation Index
; phenology
; plant development
; statistical model
; temperature
; theoretical model
; tropic climate
; tropical mountains
; Bayesian dynamic models
; browning
; climate change
; greening
; Normalized Difference Vegetation Index
; phenology
; tropical mountains
; Altitude
; Climate Change
; Ecosystem
; Linear Models
; Models, Theoretical
; Plant Development
; Rain
; Temperature
; Tropical Climate
英文摘要: Global climate change has emerged as a major driver of ecosystem change. Here, we present evidence for globally consistent responses in vegetation dynamics to recent climate change in the world's mountain ecosystems located in the pan-tropical belt (30°N-30°S). We analyzed decadal-scale trends and seasonal cycles of vegetation greenness using monthly time series of satellite greenness (Normalized Difference Vegetation Index) and climate data for the period 1982-2006 for 47 mountain protected areas in five biodiversity hotspots. The time series of annual maximum NDVI for each of five continental regions shows mild greening trends followed by reversal to stronger browning trends around the mid-1990s. During the same period we found increasing trends in temperature but only marginal change in precipitation. The amplitude of the annual greenness cycle increased with time, and was strongly associated with the observed increase in temperature amplitude. We applied dynamic models with time-dependent regression parameters to study the time evolution of NDVI-climate relationships. We found that the relationship between vegetation greenness and temperature weakened over time or was negative. Such loss of positive temperature sensitivity has been documented in other regions as a response to temperature-induced moisture stress. We also used dynamic models to extract the trends in vegetation greenness that remain after accounting for the effects of temperature and precipitation. We found residual browning and greening trends in all regions, which indicate that factors other than temperature and precipitation also influence vegetation dynamics. Browning rates became progressively weaker with increase in elevation as indicated by quantile regression models. Tropical mountain vegetation is considered sensitive to climatic changes, so these consistent vegetation responses across widespread regions indicate persistent global-scale effects of climate warming and associated moisture stresses. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62142
Appears in Collections: 影响、适应和脆弱性
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作者单位: Suri Sehgal Centre for Biodiversity and Conservation, Ashoka Trust for Research in Ecology and the Environment, Jakkur Post, Royal Enclave, Sriramapura, Bangalore, 560064, India; Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, West Bengal, 741 252, India; Forests and Environment Program, Center for International Forestry Research, Jalan CIFOR, Situ Gede, Bogor Barat, 16115, Indonesia
Recommended Citation:
Krishnaswamy J.,John R.,Joseph S.. Consistent response of vegetation dynamics to recent climate change in tropical mountain regions[J]. Global Change Biology,2014-01-01,20(1)