DOI: 10.1111/gcb.12254
论文题名: Greater phenological sensitivity to temperature on higher scottish mountains: New insights from remote sensing
作者: Chapman D.S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 11 起始页码: 3463
结束页码: 3471
语种: 英语
英文关键词: Alpine vegetation
; Climate change
; Ecosystem phenology
; EVI
; MODIS
; NDVI
; Satellite monitoring
Scopus关键词: alpine environment
; climate change
; MODIS
; NDVI
; phenology
; remote sensing
; satellite data
; sensitivity analysis
; time series analysis
; vegetation dynamics
; alpine vegetation
; altitude
; article
; climate change
; ecosystem
; ecosystem phenology
; EVI
; MODIS
; NDVI
; plant development
; remote sensing
; satellite monitoring
; season
; statistical model
; temperature
; United Kingdom
; alpine vegetation
; climate change
; ecosystem phenology
; EVI
; MODIS
; NDVI
; satellite monitoring
; Altitude
; Climate Change
; Ecosystem
; Linear Models
; Plant Development
; Remote Sensing Technology
; Scotland
; Seasons
; Temperature
英文摘要: Mountain plants are considered among the species most vulnerable to climate change, especially at high latitudes where there is little potential for poleward or uphill dispersal. Satellite monitoring can reveal spatiotemporal variation in vegetation activity, offering a largely unexploited potential for studying responses of montane ecosystems to temperature and predicting phenological shifts driven by climate change. Here, a novel remote-sensing phenology approach is developed that advances existing techniques by considering variation in vegetation activity across the whole year, rather than just focusing on event dates (e.g. start and end of season). Time series of two vegetation indices (VI), normalized difference VI (NDVI) and enhanced VI (EVI) were obtained from the moderate resolution imaging spectroradiometer MODIS satellite for 2786 Scottish mountain summits (600-1344 m elevation) in the years 2000-2011. NDVI and EVI time series were temporally interpolated to derive values on the first day of each month, for comparison with gridded monthly temperatures from the preceding period. These were regressed against temperature in the previous months, elevation and their interaction, showing significant variation in temperature sensitivity between months. Warm years were associated with high NDVI and EVI in spring and summer, whereas there was little effect of temperature in autumn and a negative effect in winter. Elevation was shown to mediate phenological change via a magnification of temperature responses on the highest mountains. Together, these predict that climate change will drive substantial changes in mountain summit phenology, especially by advancing spring growth at high elevations. The phenological plasticity underlying these temperature responses may allow long-lived alpine plants to acclimate to warmer temperatures. Conversely, longer growing seasons may facilitate colonization and competitive exclusion by species currently restricted to lower elevations. In either case, these results show previously unreported seasonal and elevational variation in the temperature sensitivity of mountain vegetation activity. © 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/62292
Appears in Collections: 影响、适应和脆弱性
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作者单位: NERC Centre for Ecology and Hydrology, Edinburgh, Bush Estate EH26 0QB, United Kingdom
Recommended Citation:
Chapman D.S.. Greater phenological sensitivity to temperature on higher scottish mountains: New insights from remote sensing[J]. Global Change Biology,2013-01-01,19(11)