黄河三角洲海岸带湿地柽柳在干旱年份的水分利用策略

doi:10.13287/j.1001-9332.201706.018

应用生态学报 ›› 2017, Vol. 28 ›› Issue (6): 1801-1807.doi: 10.13287/j.1001-9332.201706.018

黄河三角洲海岸带湿地柽柳在干旱年份的水分利用策略

王平^1,2, 刘京涛^2*, 朱金方³, 付战勇^2,4, 孙景宽²

¹山东农业大学资源与环境学院, 山东泰安 271018
²滨州学院山东省黄河三角洲生态环境重点实验室, 山东滨州 256603
³中国环境科学研究院生物多样性研究中心, 北京 100012
⁴山东农业大学林学院, 山东泰安 271018

收稿日期:2016-10-20 发布日期:2017-06-18
通讯作者: *E-mail:ljteco@126.com
作者简介:王平,女,1991年生,硕士研究生.主要从事植物生态和土壤学研究.E-mail:15684773953@163.com
基金资助:
本文由国家自然科学基金项目(41201023,41401100)和国家大学生创新创业训练计划项目(201310449113)资助

Water use strategy of Tamarix chinensis during a drought year in the coastal wetlands of the Yellow River Delta, China

WANG Ping^1,2, LIU Jing-tao^2*, ZHU Jin-fang³, FU Zhan-yong^2,4, SUN Jing-kuan²

¹College of Resources and Environment, Shandong Agricultural University, Tai’an 271018, Shandong, China
²Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou 256603, Shandong, China
³Biodiversity Research Center, Chinese Research Academy of Environmental Science, Beijing 100012, China
⁴College of Forestry, Shandong Agricultural University, Tai’an 271018, China

Received:2016-10-20 Published:2017-06-18
Contact: *E-mail:ljteco@126.com
Supported by:
This work was supported by the National Natural Science Foundation of China (41201023, 41401100), and the National Students’ Innovation and Entrepreneurship Training Program of China (201310449113)

摘要/Abstract

摘要： 以黄河三角洲海岸带贝壳堤湿地灌木群落主要建群种柽柳为对象,利用稳定同位素技术测定柽柳木质部和潜在水源δ¹⁸O值的时空变化,采用IsoSource模型计算潜在水源对柽柳的贡献比例,研究海岸带不同生境中柽柳对不同水分条件的适应机制.结果表明: 在降水较少的干旱年份,相对于不稳定的降水,柽柳倾向于利用稳定的土壤水和浅层地下水,但是在不同微地形生境下柽柳的水分利用策略有所差异.滩脊的柽柳72.6%～95.4%水分来源于浅层地下水和含水量相对较高的深层土壤水(40～100 cm);高潮线附近的柽柳有40.7%～97.3%的水分来源于上层土壤水(0～40 cm),以避免海水和浅层地下水的盐分胁迫.柽柳对外界水盐条件变化具有较强的适应性,在海岸带可利用水资源缺乏的恶劣生境中具有更强的种间竞争优势,从而导致柽柳单优灌木群落的形成.

Abstract: Tamarix chinensis, the dominant species of plant communities in the coastal 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.

王平, 刘京涛, 朱金方, 付战勇, 孙景宽. 黄河三角洲海岸带湿地柽柳在干旱年份的水分利用策略[J]. 应用生态学报, 2017, 28(6): 1801-1807.

WANG Ping, LIU Jing-tao, ZHU Jin-fang, FU Zhan-yong, SUN Jing-kuan. Water use strategy of Tamarix chinensis during a drought year in the coastal wetlands of the Yellow River Delta, China[J]. Chinese Journal of Applied Ecology, 2017, 28(6): 1801-1807.

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黄河三角洲海岸带湿地柽柳在干旱年份的水分利用策略

Water use strategy of Tamarix chinensis during a drought year in the coastal wetlands of the Yellow River Delta, China

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