caa a22 4500 606217886 CHVBK 20210128101110.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s11104-014-2342-z doi (NATIONALLICENCE)springer-10.1007/s11104-014-2342-z Stable oxygen isotopes reveal distinct water use patterns of two Haloxylon species in the Gurbantonggut Desert [Elektronische Daten] [Yue Dai, Xin-Jun Zheng, Li-Song Tang, Yan Li] Aims: Haloxylon ammodendron and Haloxylon persicum are the dominant species in the Gurbantonggut Desert, China, with the former grows at inter-dune lowland and the later grows at the sand dune. This study aims to investigate the dynamics of water usage of the two species and their responses to the soil water fluctuations resulting from summer precipitation. Methods: Oxygen isotope ratios (δ 18O) were measured for xylem water, soil water in different soil layers (0-300cm), precipitation water and groundwater. Four potential water sources were identified: shallow (0-40cm), middle (40-100cm) and deep soil water (100-300cm), as well as groundwater. The water sources used by the two species were calculated using the IsoSource model. Results: When the upper soil water was abundant in early spring, H. ammodendron mainly used shallow soil water while H. persicum mainly used middle soil water; when the upper soil water was depleted in summer, H. ammodendron mainly used groundwater while H. persicum mainly used deep soil water. Both species were conservative in using shallow soil water following the relatively large summer precipitations. Conclusions: The two Haloxylon species had distinct water use patterns during the growing season, which reflects their adaptations to their specific habitats in this water-limited desert environment. Large precipitations in dry summer hardly altered their water use patterns, which mean that these species are rather conservative in water use strategy. Springer International Publishing Switzerland, 2014 Sister taxa nationallicence Stable oxygen isotopes nationallicence Soil water nationallicence Groundwater nationallicence Water sources nationallicence IsoSource model nationallicence Dai Yue State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut Zheng Xin-Jun State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut Tang Li-Song State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut Li Yan State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut Plant and Soil Springer International Publishing 389/1-2(2015-04-01), 73-87 0032-079X 389:1-2<73 2015 389 11104 https://doi.org/10.1007/s11104-014-2342-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2342-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dai Yue State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Zheng Xin-Jun State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Tang Li-Song State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 700 1- Li Yan State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, 830011, Urumqi, Xinjiang, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 389/1-2(2015-04-01), 73-87 0032-079X 389:1-2<73 2015 389 11104