Plant water use strategies indicated by isotopic signatures of leaf water: Observations in southern and northern China
Plant water use strategies indicated by isotopic signatures of leaf water: Observations in southern and northern China
复制标题
叶水同位素特征表明的植物水分利用策略：中国南部和北部的观测
DOI：
10.1016/j.agrformet.2019.107624
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发表时间：
2019-10
影响因子：
6.2
通讯作者：
Xin Pei
中科院分区：
文献类型：
--
作者：
Zhan Lucheng;Chen Jiansheng;Li Ling;Xin Pei
植物是陆地水圈的重要组成部分。为了确定中国不同气候条件下植被与水圈的关系，在中国南方典型湿润湖区和中国北方半干旱干旱区进行了大规模的调查和采样活动。利用氢、氧同位素特征揭示了这些地区植物的水分利用特征。结果表明，植物叶片水的同位素特征可以有效地指示植物利用的水源。湿润湖区植被主要依靠地表水补充水分，而半干旱干旱区地下水是植物生存的主要水源。植物水分利用策略的差异表明中国南方和北方在当地水文过程中存在相当大的差异。与中国南方湿润地区不同，中国北方半干旱干旱地区植物对地下水的依赖意味着稀疏降雨难以渗透和补给地下水系统。该研究表明，植物叶片同位素特征分析可为进一步研究华北地区有争议的地下水来源提供一种有用的方法，对维持生态平衡和缓解严重缺水的影响具有重要意义。
Plants act as an important component in the terrestrial hydrosphere. To determine the relationship between vegetation and hydrosphere under different climate conditions of China, large-scale investigations and sampling campaigns were conducted in typical humid lake areas of southern China and in semiarid–arid regions of northern China. Hydrogen and oxygen isotopic signatures were used to reveal the water utilization characteristics of plants in these areas. The results suggest that isotopic signatures of plant leaf water can effectively indicate the water source used by plants. Vegetation in humid lake areas relies mainly on water supplement from surface water, whereas groundwater constitutes the primary water source for plant survival in semiarid–arid areas. The differences in the water utilization strategies of plants suggest considerable differences in the local hydrological processes between southern and northern China. Unlike the humid areas of southern China, the dependence of plants on groundwater in semiarid–arid northern China implies the difficulty for the sparse rainfall to infiltrate and recharge the groundwater system. This study demonstrated that the analysis of plant leaf isotopic signatures could constitute a useful method for further study of the controversial groundwater origin in northern China, which is important for maintaining ecological balance and alleviating the effects of serious water shortages.
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影响因子：
1.6
作者：
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