水文连通强度对芦苇、碱蓬生态化学计量的影响  

The influence of hydrological connectivity on stoichiometry of Phragmitesaustralis and Suaeda salsa

作　　者：刘佳凯 王宇[1] 张振明[1] 张明祥 LIU Jiakai;WANG Yu;ZHANG Zhenming;ZHANG Mingxiang(Beijing Forestry University,School of Ecology and Nature Conservation,Beijing 100083,China)

机构地区：[1]北京林业大学,生态与自然保护学院,北京100083

出　　处：《生态科学》2020年第4期81-88,共8页Ecological Science

基　　金：国家重点研发计划(2017YFC0505903)。

摘　　要：黄河三角洲以芦苇(Phragmites australis)和盐地碱蓬(Suaeda salsa)等植物建立的湿地生态系统对维持区域生态安全有着十分重要的作用。近年来由于受到人类活动和气候变化的双重影响,该区域湿地出现了不同程度的退化。目前黄河三角洲自然保护区正在探索引入水文连通理论指导退化湿地的恢复和重建工作。本研究以实验室模拟结合生态化学计量方法,探究不同水文连通强度的补水修复措施对建群种芦苇和碱蓬的生长及化学计量的影响。研究结果表明较弱的水文连通强度有利于碱蓬生长,而水文连通强度对芦苇生长影响不显著;碱蓬体内氮磷元素含量随水文连通减弱而增加,芦苇体内氮磷元素含量则不受水文连通强度影响。此外,植物体内氮磷比主要取决于土壤内的氮磷元素含量,水文连通对植物体内氮磷比的影响并不显著。Yellow river delta,dominated by Phragmites australis and Suaeda salsa,has many important ecological service function such as habitat supporting and is crucial important for regional ecological safety.While in recent decades,this coastal wetland has been suffering serious degradation due to anthropological activity and climate change.Local government and managers in Yellow River Delta National Conservation now are seeking for efficient measurement to restore the degraded ecosystem based on the concept of hydrological connectivity(HC).Thus,the current study aims to find the influence of HC on local species in simulation experiments combined with stoichiometry thesis.The results show low intensive HC is conducive to the growth of S.salsa and high intensive HC is also positively correlated to the accumulation of TP in the leaves of S.salsa.While different HC conditions have no significant influence on the growth of P.australis or the accumulation of TN and TP in this species.Besides,HC has insignificant influence on the N/P in P.australis or S.salsa.Compared with previous studies,the TN and TP concentration or N/P in soils and other environment conditions will influence the stoichiometry of P.australis and S.salsa more dramatically.

关 键 词：化学计量 水文连通强度 黄河三角洲 芦苇 碱蓬 

分 类 号：Q948[生物学—植物学]