干旱区生态环境知识资源中心(Arid): Ecophysiological adjustments of a pine forest to enhance early spring activity in hot and dry climate

Arid

DOI	10.1088/1748-9326/abc2f9
	Ecophysiological adjustments of a pine forest to enhance early spring activity in hot and dry climate
	Wang, Huanhuan; Gitelson, Anatoly; Sprintsin, Michael; Rotenberg, Eyal; Yakir, Dan
通讯作者	Yakir, D
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2020
卷号	15 期号:11
英文摘要	Climate change can impose large offsets between the seasonal cycle of photosynthesis and that in solar radiation and temperature which drive it. Ecophysiological adjustments to such offsets in forests growing under hot and dry conditions are critical for maintaining carbon uptake and survival. Here, we investigate the adjustments that underlie the unusually short and intense early spring productive season, under suboptimal radiation and temperature conditions in a semi-arid pine forest. We used eddy covariance flux, meteorological, and close-range sensing measurements, together with leaf chlorophyll content over four years in a semi-arid pine forest to identify the canopy-scale ecophysiological adjustments to the short active season, and long seasonal drought. The results reveal a range of processes that intricately converge to support the early spring peak (March) in photosynthetic activity, including peaks in light use efficiency, leaf chlorophyll content, increase in the absorption of solar radiation, and high leaf scattering properties (indicating optimizing leaf orientation). These canopy-scale adjustments exploit the tradeoffs between the yet increasing temperature and solar radiation, but the concurrently rapidly diminishing soil moisture. In contrast, during the long dry stressful period with rapidly declining photosynthesis under high and potentially damaging solar radiation, physiological photoprotection was conferred by strongly relaxing the early spring adjustments. The results provide evidence for canopy-scale ecophysiological adjustments, detectable by spectral measurements, that support the survival and productivity of a pine forest under the hot and dry conditions, which may apply to large areas in the Mediterranean and other regions in the next few decades due to the current warming and drying trends.
英文关键词	adjustments Aleppo pine Monteith assumption optimum time photoprotection semi-arid forest
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000591062500001
WOS关键词	NET PRIMARY PRODUCTION ; LIGHT USE EFFICIENCY ; CHLOROPHYLL FLUORESCENCE ; ENERGY-DISSIPATION ; EXCHANGE-RATES ; CARBON ; DROUGHT ; LEAF ; PRODUCTIVITY ; DYNAMICS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327574
作者单位	[Wang, Huanhuan; Rotenberg, Eyal; Yakir, Dan] Weizmann Inst Sci, Dept Earth & Planetary Sci, IL-7610001 Rehovot, Israel; [Gitelson, Anatoly] Univ Nebraska, Sch Nat Resources, Lincoln, NE 68583 USA; [Gitelson, Anatoly] Israel Inst Technol Technion, IL-3200003 Haifa, Israel; [Sprintsin, Michael] Jewish Natl Fund Keren Keyemet LeIsrael, Land Dev Author, IL-99775 Eshtaol, M P Shimshon, Israel
推荐引用方式 GB/T 7714	Wang, Huanhuan,Gitelson, Anatoly,Sprintsin, Michael,et al. Ecophysiological adjustments of a pine forest to enhance early spring activity in hot and dry climate[J],2020,15(11).
APA	Wang, Huanhuan,Gitelson, Anatoly,Sprintsin, Michael,Rotenberg, Eyal,&Yakir, Dan.(2020).Ecophysiological adjustments of a pine forest to enhance early spring activity in hot and dry climate.ENVIRONMENTAL RESEARCH LETTERS,15(11).
MLA	Wang, Huanhuan,et al."Ecophysiological adjustments of a pine forest to enhance early spring activity in hot and dry climate".ENVIRONMENTAL RESEARCH LETTERS 15.11(2020).