Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aa6da8 |
Topoclimate effects on growing season length and montane conifer growth in complex terrain | |
Barnard, D. M.1; Barnard, H. R.1,2; Molotch, N. P.1,2,3 | |
2017-05-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Spatial variability in the topoclimate-driven linkage between forest phenology and tree growth in complex terrain is poorly understood, limiting our understanding of how ecosystems function as a whole. To characterize the influence of topoclimate on phenology and growth, we determined the start, end, and length of the growing season (GS(start), GS(end), and GSL, respectively) using the correlation between transpiration and evaporative demand, measured with sapflow. We then compared these metrics with stem relative basal area increment (relative BAI) at seven sites among elevation and aspects in a Colorado montane forest. As elevation increased, we found shorter GSL (-50 d km(-1)) due to later GS(start) (40 d km(-1)) and earlier GS(end) (-10 d km(-1)). North-facing sites had a 21 d shorter GSL than south-facing sites at similar elevations (i.e. equal to 200 m elevation difference on a given aspect). Growing season length was positively correlated with relative BAI, explaining 83% of the variance. This study shows that topography exerts strong environmental controls on GSL and thus forest growth. Given the climate-related dependencies of these controls, the results presented here have important implications for ecosystem responses to changes in climate and highlight the need for improved phenology representation in complex terrain. |
英文关键词 | forest growth sapflow montane ecosystem complex terrain growing season length topoclimate |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402551000003 |
WOS关键词 | COLORADO FRONT RANGE ; CLIMATE-CHANGE ; STOMATAL CONDUCTANCE ; BOUNDARY-LAYER ; WATER-MOVEMENT ; FOREST ; PHOTOSYNTHESIS ; PHENOLOGY ; TRANSPIRATION ; DROUGHT |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/14898 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Inst Arctic & Alpine Res, 4001 Discovery Dr, Boulder, CO 80309 USA; 2.Univ Colorado, Dept Geog, Guggenheim 210,UCB 260, Boulder, CO 80309 USA; 3.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91190 USA |
推荐引用方式 GB/T 7714 | Barnard, D. M.,Barnard, H. R.,Molotch, N. P.. Topoclimate effects on growing season length and montane conifer growth in complex terrain[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(6). |
APA | Barnard, D. M.,Barnard, H. R.,&Molotch, N. P..(2017).Topoclimate effects on growing season length and montane conifer growth in complex terrain.ENVIRONMENTAL RESEARCH LETTERS,12(6). |
MLA | Barnard, D. M.,et al."Topoclimate effects on growing season length and montane conifer growth in complex terrain".ENVIRONMENTAL RESEARCH LETTERS 12.6(2017). |
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