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Hydrological Response of Populus euphratica Olve. Radial Growth in Ejinaa Banner, Inner Mongolia
Author(s) -
Liu PuXing,
Peng JianFeng,
Chen FaHu
Publication year - 2007
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2007.00425.x
Subject(s) - populus euphratica , inner mongolia , surface runoff , dendrochronology , banner , precipitation , china , hydrology (agriculture) , population , dendroclimatology , environmental science , positive correlation , negative correlation , physical geography , geography , forestry , ecology , biology , geology , archaeology , medicine , demography , geotechnical engineering , sociology , meteorology
Populus euphratica Olve. is a dominant tree species in Ejinaa Oasis of the lower reaches of the Heihe River, Inner Mongolia, China. In recent years, the population of this species has shown signs of degradation that are suggested to be probably associated with the decrease of surface water. In this study, the history of river runoff in this region was examined with a dendrochronological study of P. euphratica from four sites. It is found that tree‐ring widths in the all sites have negative correlation with runoffs of all months at the Zhengyixia hydrological station. Principal component (PC) analysis of the tree‐ring chronologies shows that the first PC (PC1) accounts for 49.98% of the total variances. The first PC is found to have a significantly negative correlation with runoffs in March and April (− 0.52 and − 0.43, respectively, P < 0.05). This negative correlation might be related to variations in the depth of underground water.