Use of 2H and 18O stable isotopes to investigate water sources for different ages of Populus euphratica along the lower Heihe River

Autor:	Jonathan M. Friedman, Yaning Chen, Jarre Heng A. Hati, Yapeng Chen, Shubao Liu, Gonghuan Fang
Rok vydání:	2015
Předmět:	Hydrology geography geography.geographical_feature_category biology δ18O Ecology Stable isotope ratio Water source Xylem biology.organism_classification Soil water Environmental science Ecology Evolution Behavior and Systematics Populus euphratica Groundwater Riparian zone
Zdroj:	Ecological Research. 30:581-587
ISSN:	1440-1703 0912-3814
Popis:	Investigation of the water sources used by trees of different ages is essential to formulate a conservation strategy for the riparian tree, P. euphratica. This study addressed the contributions of different potential water sources to P. euphratica based on levels of stable oxygen and hydrogen isotopes (δ18O, δ2H) in the xylem of different aged P. euphratica, as well as in soil water and groundwater along the lower Heihe River. We found significant differences in δ18O values in the xylem of different aged P. euphratica. Specifically, the δ18O values of young, mature and over-mature forests were −5.368(±0.252) ‰, −6.033(± 0.185) ‰ and −6.924 (± 0.166) ‰, respectively, reflecting the reliance of older trees on deeper sources of water with a δ18O value closer to that of groundwater. Different aged P. euphratica used different water sources, with young forests rarely using groundwater (mean 45 %), and mature and over-mature forests using water from deeper than 100 cm derived primarily from groundwater.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c610a5d1b765781d294f538512cac1ec https://doi.org/10.1007/s11284-015-1270-6 Zobrazit plný text záznamu Plný text ve formátu PDF