气候变化领域集成服务门户(CCPortal): Do H-2 and O-18 in leaf water reflect environmental drivers differently?

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DOI	10.1111/nph.18113
	Do H-2 and O-18 in leaf water reflect environmental drivers differently?
	Cernusak, Lucas A.; Barbeta, Adria; Bush, Rosemary T.; Eichstaedt (Bogelein), Rebekka; Pedro Ferrio, Juan; Flanagan, Lawrence B.; Gessler, Arthur; Martin-Gomez, Paula; Hirl, Regina T.; Kahmen, Ansgar; Keitel, Claudia; Lai, Chun-Ta; Munksgaard, Niels C.; Nelson, Daniel B.; Ogee, Jerome; Roden, John S.; Schnyder, Hans; Voelker, Steven L.; Wang, Lixin; Stuart-Williams, Hilary; Wingate, Lisa; Yu, Wusheng; Zhao, Liangju; Cuntz, Matthias
通讯作者	Cernusak, LA (通讯作者)
发表日期	2022
ISSN	0028-646X
EISSN	1469-8137
起始页码	41
结束页码	51
卷号	235 期号:1
英文摘要	We compiled hydrogen and oxygen stable isotope compositions (delta H-2 and delta O-18) of leaf water from multiple biomes to examine variations with environmental drivers. Leaf water delta H-2 was more closely correlated with delta H-2 of xylem water or atmospheric vapour, whereas leaf water delta O-18 was more closely correlated with air relative humidity. This resulted from the larger proportional range for delta H-2 of meteoric waters relative to the extent of leaf water evaporative enrichment compared with delta O-18. We next expressed leaf water as isotopic enrichment above xylem water (Delta H-2 and Delta O-18) to remove the impact of xylem water isotopic variation. For Delta H-2, leaf water still correlated with atmospheric vapour, whereas Delta O-18 showed no such correlation. This was explained by covariance between air relative humidity and the Delta O-18 of atmospheric vapour. This is consistent with a previously observed diurnal correlation between air relative humidity and the deuterium excess of atmospheric vapour across a range of ecosystems. We conclude that H-2 and O-18 in leaf water do indeed reflect the balance of environmental drivers differently; our results have implications for understanding isotopic effects associated with water cycling in terrestrial ecosystems and for inferring environmental change from isotopic biomarkers that act as proxies for leaf water.
关键词	HYDROGEN ISOTOPE COMPOSITION DELTA-D VALUES STABLE-ISOTOPES RELATIVE-HUMIDITY DIURNAL-VARIATION OXYGEN ISOTOPES GAS-EXCHANGE PLANT WATER DRY-MATTER ENRICHMENT
英文关键词	evaporative enrichment; isotopic biomarker; leaf water; relative humidity; stable isotopes
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000783159300001
来源期刊	NEW PHYTOLOGIST
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260785
推荐引用方式 GB/T 7714	Cernusak, Lucas A.,Barbeta, Adria,Bush, Rosemary T.,et al. Do H-2 and O-18 in leaf water reflect environmental drivers differently?[J]. 中国科学院青藏高原研究所,2022,235(1).
APA	Cernusak, Lucas A..,Barbeta, Adria.,Bush, Rosemary T..,Eichstaedt .,Pedro Ferrio, Juan.,...&Cuntz, Matthias.(2022).Do H-2 and O-18 in leaf water reflect environmental drivers differently?.NEW PHYTOLOGIST,235(1).
MLA	Cernusak, Lucas A.,et al."Do H-2 and O-18 in leaf water reflect environmental drivers differently?".NEW PHYTOLOGIST 235.1(2022).