Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14804 |
Extensive land cover change across Arctic-Boreal Northwestern North America from disturbance and climate forcing | |
Wang, Jonathan A.1; Sulla-Menashe, Damien1; Woodcock, Curtis E.1; Sonnentag, Oliver2; Keeling, Ralph F.3; Friedl, Mark A.1 | |
2019-09-17 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | A multitude of disturbance agents, such as wildfires, land use, and climate-driven expansion of woody shrubs, is transforming the distribution of plant functional types across Arctic-Boreal ecosystems, which has significant implications for interactions and feedbacks between terrestrial ecosystems and climate in the northern high-latitude. However, because the spatial resolution of existing land cover datasets is too coarse, large-scale land cover changes in the Arctic-Boreal region (ABR) have been poorly characterized. Here, we use 31 years (1984-2014) of moderate spatial resolution (30 m) satellite imagery over a region spanning 4.7 x 10(6) km(2) in Alaska and northwestern Canada to characterize regional-scale ABR land cover changes. We find that 13.6 +/- 1.3% of the domain has changed, primarily via two major modes of transformation: (a) simultaneous disturbance-driven decreases in Evergreen Forest area (-14.7 +/- 3.0% relative to 1984) and increases in Deciduous Forest area (+14.8 +/- 5.2%) in the Boreal biome; and (b) climate-driven expansion of Herbaceous and Shrub vegetation (+7.4 +/- 2.0%) in the Arctic biome. By using time series of 30 m imagery, we characterize dynamics in forest and shrub cover occurring at relatively short spatial scales (hundreds of meters) due to fires, harvest, and climate-induced growth that are not observable in coarse spatial resolution (e.g., 500 m or greater pixel size) imagery. Wildfires caused most of Evergreen Forest Loss and Evergreen Forest Gain and substantial areas of Deciduous Forest Gain. Extensive shifts in the distribution of plant functional types at multiple spatial scales are consistent with observations of increased atmospheric CO2 seasonality and ecosystem productivity at northern high-latitudes and signal continental-scale shifts in the structure and function of northern high-latitude ecosystems in response to climate change. |
英文关键词 | Arctic Boreal forest deciduous forest evergreen forest disturbance land cover change plant functional type remote sensing shrub encroachment wildfire |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000486743500001 |
WOS关键词 | ATMOSPHERIC CO2 ; ESTIMATING AREA ; MAP ACCURACY ; FOREST ; FIRE ; CLASSIFICATION ; PRODUCTIVITY ; VARIABILITY ; PATTERNS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187109 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Boston Univ, Dept Earth & Environm, 685 Commonwealth Ave, Boston, MA 02215 USA; 2.Univ Montreal, Dept Geog, Montreal, PQ, Canada; 3.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA |
推荐引用方式 GB/T 7714 | Wang, Jonathan A.,Sulla-Menashe, Damien,Woodcock, Curtis E.,et al. Extensive land cover change across Arctic-Boreal Northwestern North America from disturbance and climate forcing[J]. GLOBAL CHANGE BIOLOGY,2019. |
APA | Wang, Jonathan A.,Sulla-Menashe, Damien,Woodcock, Curtis E.,Sonnentag, Oliver,Keeling, Ralph F.,&Friedl, Mark A..(2019).Extensive land cover change across Arctic-Boreal Northwestern North America from disturbance and climate forcing.GLOBAL CHANGE BIOLOGY. |
MLA | Wang, Jonathan A.,et al."Extensive land cover change across Arctic-Boreal Northwestern North America from disturbance and climate forcing".GLOBAL CHANGE BIOLOGY (2019). |
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