文献类型：期刊文献

英文题名：A drought-induced pervasive increase in tree mortality across Canada's boreal forests

作者：Peng, Changhui[1,2] Ma, Zhihai[1] Lei, Xiangdong[1,3] Zhu, Qiuan[1,2] Chen, Huai[1,2] Wang, Weifeng[1] Liu, Shirong[4] Li, Weizhong[1,2] Fang, Xiuqin[1] Zhou, Xiaolu[1]

第一作者：Peng, Changhui

通信作者：Peng, CH[1]

机构：[1]Univ Quebec, Inst Environm Sci, Dept Biol Sci, Montreal, PQ H3C 3P8, Canada;[2]NW A&F Univ, Coll Forestry, Lab Ecol Forecasting & Global Change, Yangling 712100, Shaanxi, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, Beijing 100091, Peoples R China

年份：2011

卷号：1

期号：9

起止页码：467-471

外文期刊名：NATURE CLIMATE CHANGE

收录：;Scopus(收录号：2-s2.0-84857127373);WOS:【SSCI(收录号:WOS:000298740300019)，SCI-EXPANDED(收录号:WOS:000298740300019)】；

基金：Funding for this study was provided by the Natural Sciences and Engineering Research Council of Canada (NSERC) Strategic Network (ForValuenet), an NSERC discovery grant and the China QianRen programme. We thank the Forest Management Branch of Alberta Ministry of Sustainable Resource Development, Saskatchewan Renewable Resources Forestry Branch, the Forestry Branch of Manitoba, Ontario Terrestrial Assessment Program and Ministere des Ressources Naturelles et de la Faune du Quebec, and our colleagues (P. Comeau, J. Liu, V. LeMay, S. Huang, J. Parton and K. Zhou) for providing detailed data. C. P. acknowledges the support he received during his sabbatical leave at Northwest A&F University, China. We also thank T. Hogg for his help with our calculations of CMI, P. J. van Mantgem for his assistance with our statistical models, W. Z. for her technical assistance and G. Hart for editorial help, as well as T. Moore, J. Guiot and P. J. van Mantgem for their comments and discussions on the earlier draft of the paper.

语种：英文

摘要：Drought-induced tree mortality is expected to increase worldwide under projected future climate changes(1-4). The Canadian boreal forests, which occupy about 30% of the boreal forests worldwide and 77% of Canada's total forested land, play a critical role in the albedo of Earth's surface(5) and in its global carbon budget(6). Many of the previously reported regional-scale impacts of drought on tree mortality have affected low-and middle-latitude tropical regions(2) and the temperate forests of the western United States(3), but no study has examined high-latitude boreal regions with multiple species at a regional scale using long-term forest permanent sampling plots(7-9). Here, we estimated tree mortality in natural stands throughout Canada's boreal forests using data from the permanent sampling plots and statistical models. We found that tree mortality rates increased by an overall average of 4 : 7% yr(-1) from 1963 to 2008, with higher mortality rate increases in western regions than in eastern regions (about 4.9 and 1 : 9% yr(-1), respectively). The water stress created by regional drought may be the dominant contributor to these widespread increases in tree mortality rates across tree species, sizes, elevations, longitudes and latitudes. Western Canada seems to have been more sensitive to drought than eastern Canada.