孔雀河下游衰退河岸林的沙漠化分析  

Analysis on Desertification of Degraded Riparian Forest in the Lower Reaches of Peacock River

作　　者：刘加珍[1] 李卫红[2] 陈永金[1] 靖淑慧 马荣贞 LIU Jia-zhen;LI Wei-hong;CHEN Yong-jin;JING Hu-hui;MA Rong-zhen(School of Environmental and Planning,Liaocheng University,Liaocheng 252059,China;Key Laboratary of Oasis Ecosystem and Desert Environment,Xinjiang Institute of Ecology and Geography,CAS,Urumqi,830011,China)

机构地区：[1]聊城大学环境与规划学院,山东聊城252059 [2]中国科学院绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐830011

出　　处：《聊城大学学报（自然科学版）》2018年第1期65-71,103,共8页Journal of Liaocheng University:Natural Science Edition

基　　金：国家科技支撑计划课题(2014BAC15B02);中国博士后特别资助项目(2013T60905);中国博士后基金项目(2012M512058)资助

摘　　要：依据实地勘察资料,分析了孔雀河下游生态退化特征及其沙漠化发生的可能性,为荒漠河岸生态系统恢复与整治提供重要参考.结果表明:(1)河道断流,残留表水水质恶化,远离水源地的断面土壤退化严重、土壤养分含量低;存留胡杨以成年木较多,顺沿河道方向胡杨死亡率呈现增加趋势,胡杨的聚群分布差异越大;(2)衰退河岸林的生境类型可分为绿洲-荒漠过渡类(Ⅰ)、轻度荒漠化类(Ⅱ)、盐土荒漠化类(Ⅲ)三种类型;决策树模型显示,胡杨是沙漠化发生与否的重要影响因素,胡杨盖度小于1%发生轻度沙漠化的可能达16.7%、发生重度沙漠化的可能性达83.3%.Based on surveyed data in the lower reaches of Peacock River,the probability of desertification and characteristic of ecological degradation are analyzed,to provide important reference for restoration and remediation of desert riparian ecosystem.The results showed that（1）water quality of residual surface water is deteriorated due to Peacock River dry,the degradation of soil at the section far away from the water source is severe and the content of soil nutrient is low.Most of survival Populus euphratica are adult wood.Along the river,the mortality rate of Populus euphratica is increasing trend and greater the differentia of distribution among the survival trees are showed.（2）Three habitat types namely,oasis-desert transition zone,slight desertification zone and saliniferous desertification zone are divided by Cluster Analysis.Decision-tree model showed that Populus euphratica is the key factor to control desertification,the probability of slight desertification reach 16.7%,while the probability of heavy desertification would be 83.3% as less than 1% coverage of Populus euphratica,

关 键 词：孔雀河 生态退化 河岸林 沙漠化 决策树 

分 类 号：Q145[生物学—生态学] X37[生物学—普通生物学]