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- Title
黄河三角洲海岸带湿地柽柳在干旱年份的水分利用策略.
- Authors
王平; 刘京涛; 朱金方; 付战勇; 孙景宽
- Abstract
Tamarix chinensis, the dominant species of plant communities in the Dcoastal wetlands of the Yellow River Delta, was selected to study the water use strategy of coastal plants at different habitats during a drought year. The δ18O values for xylem water of T. chinensis were analyzed. Potential contributions by different water sources to T. chinensis were estimated using the IsoSource model. The contributions were analyzed to reveal the adaptation mechanism of T. chinensis to water stress at different habitats. The results showed that the main water sources for T. chinensis during a drought year were soil water and groundwater rather than precipitation. However, the water use strategies of T. chinensis changed significantly with different micro-topographies. For dune crests, 72.6%-95.4% water of T. chinensis came from deeper soil water (40-100 cm) and groundwater. However, near the high tide line, T. chinensis absorbed 40.7%-97.3% of the water from the upper soil (0-40 cm) to avoid the salt stress caused by sea water and shallow groundwater. This provided T. chinensis with a competitive advantage related to water consumption and improved its water use efficiency in the coastal ecosystem, which led to mono-dominant shrub community of T. chinensis in this area.
- Subjects
CHINA; TAMARIX chinensis; DELTAS; COASTAL wetlands; PLANT communities; PLANT classification
- Publication
Yingyong Shengtai Xuebao, 2017, Vol 28, Issue 6, p1801
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201706.018