干旱区生态环境知识资源中心(Arid): Insight into Canary Island pine physiology provided by stable isotope patterns of water and plant tissues along an altitudinal gradient

Arid

DOI	10.1093/treephys/tpab046
	Insight into Canary Island pine physiology provided by stable isotope patterns of water and plant tissues along an altitudinal gradient
	Miranda, Jose Carlos; Lehmann, Marco M.; Saurer, Matthias; Altman, Jan; Treydte, Kerstin
通讯作者	Miranda, JC (corresponding author), Snow & Landscape Res WSL, Swiss Fed Inst Forest, CH-8903 Birmensdorf, Switzerland.
来源期刊	TREE PHYSIOLOGY
ISSN	0829-318X
EISSN	1758-4469
出版年	2021
卷号	41 期号:9 页码:1611-1626
英文摘要	The Canary Islands, an archipelago east of Morocco's Atlantic coast, present steep altitudinal gradients covering various climatic zones from hot deserts to subalpine Mediterranean, passing through fog-influenced cloud forests. Unlike the majority of the Canarian flora, Pinus canariensis C. Sm. ex DC. in Buch grow along most of these gradients, allowing the study of plant functioning in contrasting ecosystems. Here we assess the water sources (precipitation, fog) of P. canariensis and its physiological behavior in its different natural environments. We analyzed carbon and oxygen isotope ratios of water and organics from atmosphere, soil and different plant organs and tissues (including 10-year annual time series of tree-ring cellulose) of six sites from 480 to 1990 m above sea level on the Canary Island La Palma. We found a decreasing delta O-18 trend in source water that was overridden by an increasing delta O-18 trend in needle water, leaf assimilates and tree-ring cellulose with increasing altitude, suggesting site-specific tree physiological responses to relative humidity. Fog-influenced and fog-free sites showed similar delta C-13 values, suggesting photosynthetic activity to be limited by stomatal closure and irradiance at certain periods. In addition, we observed an O-18-depletion (fog-free and timberline sites) and C-13-depletion (fog-influenced and fog-free sites) in latewood compared with earlywood caused by seasonal differences in: (i) water uptake (i.e., deeper ground water during summer drought, fog water frequency and interception) and (ii) meteorological conditions (stem radial growth and latewood delta O-18 correlated with winter precipitation). In addition, we found evidence for foliar water uptake and strong isotopic gradients along the pine needle axis in water and assimilates. These gradients are likely the reason for an unexpected underestimation of pine needle water delta O-18 when applying standard leaf water delta O-18 models. Our results indicate that soil water availability and air humidity conditions are the main drivers of the physiological behavior of pine along the Canary Island's altitudinal gradients.
英文关键词	Canary Islands cloud forest drought Pinus canariensis relative humidity stable isotopes tree rings vapor pressure deficit
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000710990200005
WOS关键词	LEAF WATER ; TREE-RINGS ; FOG WATER ; CANOPY TRANSPIRATION ; O-18 ENRICHMENT ; FOLIAR UPTAKE ; GAS-EXCHANGE ; OXYGEN ; CARBON ; CELLULOSE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368033
作者单位	[Miranda, Jose Carlos; Lehmann, Marco M.; Saurer, Matthias; Altman, Jan; Treydte, Kerstin] Snow & Landscape Res WSL, Swiss Fed Inst Forest, CH-8903 Birmensdorf, Switzerland; [Miranda, Jose Carlos] Univ Politecn Madrid, Dept Sistemas & Recursos Nat, Madrid 28034, Spain; [Altman, Jan] Czech Acad Sci, Inst Bot, Pruhonice 25243, Czech Republic
推荐引用方式 GB/T 7714	Miranda, Jose Carlos,Lehmann, Marco M.,Saurer, Matthias,et al. Insight into Canary Island pine physiology provided by stable isotope patterns of water and plant tissues along an altitudinal gradient[J],2021,41(9):1611-1626.
APA	Miranda, Jose Carlos,Lehmann, Marco M.,Saurer, Matthias,Altman, Jan,&Treydte, Kerstin.(2021).Insight into Canary Island pine physiology provided by stable isotope patterns of water and plant tissues along an altitudinal gradient.TREE PHYSIOLOGY,41(9),1611-1626.
MLA	Miranda, Jose Carlos,et al."Insight into Canary Island pine physiology provided by stable isotope patterns of water and plant tissues along an altitudinal gradient".TREE PHYSIOLOGY 41.9(2021):1611-1626.