Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13795 |
Recent climatic drying leads to age-independent growth reductions of white spruce stands in western Canada | |
Hogg, Edward H.1; Michaelian, Michael1; Hook, Trisha I.1; Undershultz, Michael E.2 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
![]() |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Since 2001, climatic conditions have been notably drier than normal across large areas of the western Canadian interior, leading to widespread impacts on the forests of this region. This poses a major concern for the future, given climate change projections for continued warming and drying. We conducted tree-ring analysis in 75 pure stands of white spruce (Picea glauca) across Alberta and west-central Saskatchewan to examine the effects of recent climatic drying on the growth of this important boreal tree species. Allometric equations were used to calculate annual growth in aboveground tree biomass (G(BM)) from ring width measurements. Results showed an increasing trend in G(BM) from the 1960s to the 1990s, followed by a sharp decline during the severe drought of 2001-2002. Of the 75 stands, only 18 recovered sufficiently to cause an increase in mean G(BM) from the predrought decade of 1991-2000 to the subsequent decade of 2001-2010. The remaining 57 stands exhibited a decline in mean G(BM) between these decades. Climatic drying was a major cause of the growth decline, as shown by the significant stand-level relationship between percentage change in decadal mean G(BM) and the change in decadal mean values of a climate moisture index from 1991-2000 to 2001-2010. Subsequent analyses of boreal stands sampled across Alberta during 2015 revealed that white spruce growth had declined even further as drought conditions intensified during 2014-2015. Overall, there was a 38% decrease in mean G(BM) between 1997 and 2015, but surprisingly, the percentage decrease was not significantly different for young, productive stands compared with older, less productive stands. Thus, stand ageing cannot explain the observed decline in white spruce growth during the past quarter century, suggesting that these forests are at risk if the trend towards more frequent, severe drought continues in the region. |
英文关键词 | biomass increment boreal forest conifer drought Picea glauca productivity tree rings white spruce |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000029 |
WOS关键词 | TREE MORTALITY ; BOREAL FOREST ; INTERANNUAL VARIATION ; REGIONAL DROUGHT ; SOUTHERN LIMIT ; HALF-CENTURY ; BIOMASS ; IMPACTS ; DRIVEN ; YUKON |
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/17858 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Nat Resources Canada, Canadian Forest Serv, Edmonton, AB, Canada; 2.Alberta Agr & Forestry Forest Hlth & Adaptat, Edmonton, AB, Canada |
推荐引用方式 GB/T 7714 | Hogg, Edward H.,Michaelian, Michael,Hook, Trisha I.,et al. Recent climatic drying leads to age-independent growth reductions of white spruce stands in western Canada[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Hogg, Edward H.,Michaelian, Michael,Hook, Trisha I.,&Undershultz, Michael E..(2017).Recent climatic drying leads to age-independent growth reductions of white spruce stands in western Canada.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Hogg, Edward H.,et al."Recent climatic drying leads to age-independent growth reductions of white spruce stands in western Canada".GLOBAL CHANGE BIOLOGY 23.12(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论