[Water sources of and in the Tianshan Mountains in summer].

Water use patterns of trees and shrubs in the coniferous forest remain unclear, due to a lack of quantitative analysis on water use dynamics. In this study, the xylem water hydrogen and oxygen stable isotope compositions of and the companion shrub species were measured to detect their water sources. The IsoSource model was used to analyze the relative contribution of each potential water source for both species during summer.