干旱区生态环境知识资源中心(Arid): Montane forest productivity across a semiarid climatic gradient

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DOI	10.1111/gcb.15335
	Montane forest productivity across a semiarid climatic gradient
	Knowles, John F.; Scott, Russell L.; Biederman, Joel A.; Blanken, Peter D.; Burns, Sean P.; Dore, Sabina; Kolb, Thomas E.; Litvak, Marcy E.; Barron-Gafford, Greg A.
通讯作者	Knowles, JF
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2020
卷号	26 期号:12 页码:6945-6958
英文摘要	High-elevation montane forests are disproportionately important to carbon sequestration in semiarid climates where low elevations are dry and characterized by low carbon density ecosystems. However, these ecosystems are increasingly threatened by climate change with seasonal implications for photosynthesis and forest growth. As a result, we leveraged eddy covariance data from six evergreen conifer forest sites in the semiarid western United States to extrapolate the status of carbon sequestration within a framework of projected warming and drying. At colder locations, the seasonal evolution of gross primary productivity (GPP) was characterized by a single broad maximum during the summer that corresponded to snow melt-derived moisture and a transition from winter dormancy to spring activity. Conversely, winter dormancy was transient at warmer locations, and GPP was responsive to both winter and summer precipitation such that two distinct GPP maxima were separated by a period of foresummer drought. This resulted in a predictable sequence of primary limiting factors to GPP beginning with air temperature in winter and proceeding to moisture and leaf area during the summer. Due to counteracting winter (positive) and summer (negative) GPP responses to warming, leaf area index and moisture availability were the best predictors of annual GPP differences across sites. Overall, mean annual GPP was greatest at the warmest site due to persistent vegetation photosynthetic activity throughout the winter. These results indicate that the trajectory of this region's carbon sequestration will be sensitive to reduced or delayed summer precipitation, especially if coupled to snow drought and earlier soil moisture recession, but summer precipitation changes remain highly uncertain. Given the demonstrated potential for seasonally offsetting responses to warming, we project that decadal semiarid montane forest carbon sequestration will remain relatively stable in the absence of severe disturbance.
英文关键词	carbon dormancy eddy covariance evergreen conifer flux monsoon mountain semi-arid snow southwest
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000574030000001
WOS关键词	NORTH-AMERICAN MONSOON ; NET ECOSYSTEM EXCHANGE ; SUB-ALPINE FOREST ; CARBON-DIOXIDE ; HIGH-ELEVATION ; SEASONAL-VARIATION ; ROCKY-MOUNTAINS ; WATER-BALANCE ; UNITED-STATES ; CO2 EXCHANGE
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326582
作者单位	[Knowles, John F.; Scott, Russell L.; Biederman, Joel A.] USDA ARS, Southwest Watershed Res Ctr, 2000 E Allen Rd, Tucson, AZ 85719 USA; [Knowles, John F.; Barron-Gafford, Greg A.] Univ Arizona, Sch Geog Dev & Environm, Tucson, AZ USA; [Blanken, Peter D.; Burns, Sean P.] Univ Colorado, Dept Geog, Boulder, CO 80309 USA; [Burns, Sean P.] Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; [Dore, Sabina; Kolb, Thomas E.] No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA; [Litvak, Marcy E.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
推荐引用方式 GB/T 7714	Knowles, John F.,Scott, Russell L.,Biederman, Joel A.,et al. Montane forest productivity across a semiarid climatic gradient[J]. University of Arizona,2020,26(12):6945-6958.
APA	Knowles, John F..,Scott, Russell L..,Biederman, Joel A..,Blanken, Peter D..,Burns, Sean P..,...&Barron-Gafford, Greg A..(2020).Montane forest productivity across a semiarid climatic gradient.GLOBAL CHANGE BIOLOGY,26(12),6945-6958.
MLA	Knowles, John F.,et al."Montane forest productivity across a semiarid climatic gradient".GLOBAL CHANGE BIOLOGY 26.12(2020):6945-6958.