古尔班通古特沙漠沙丘主要灌木的种群数量动态  

Population dynamics of main sand-fixing shrubs in the Gurbantunggut Desert

作　　者：朱春鸣 董治宝 刘铮瑶 肖南 杨军怀 冯淼彦 Zhu Chunming;Dong Zhibao;Liu Zhengyao;Xiao Nan;Yang Junhuai;Feng Miaoyan(School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China;College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]陕西师范大学地理科学与旅游学院,陕西西安710119 [2]兰州大学资源环境学院,甘肃兰州730000

出　　处：《中国沙漠》2021年第2期129-137,共9页Journal of Desert Research

基　　金：国家自然科学基金项目(41661022);甘肃农业大学盛彤笙创新基金项目(GAU-CX1121);甘肃农业大学学科建设专项基金(GAU-XKJS-2018-144)。

摘　　要：种群数量动态的研究是认识种群的生存现状及发展动态的前提。通过对古尔班通古特沙漠固定沙丘、半固定沙丘和流动沙丘上主要固沙灌木的样地调查,分析了固沙灌木的年龄结构,建立了3种沙丘上固沙灌木的静态生命表和存活曲线。结果表明:(1)固沙灌木的存活个体数呈逐级递减的趋势,幼龄个体占有很高的比例;固定沙丘上梭梭(Haloxylon ammodendron)呈现Ⅰ型存活曲线,种群退化,白梭梭(Haloxylon persicum)呈现Ⅱ型存活曲线,种群稳定;(2)半固定沙丘上白梭梭呈Ⅱ型存活曲线,种群相对稳定;沙拐枣(Calligonum mongolicum)和油蒿(Artemisia ordosica)均呈现Ⅰ型存活曲线,种群处于退化状态;(3)流动沙丘上沙拐枣呈现Ⅲ型存活曲线,种群有较大的增长潜力,白梭梭呈现出Ⅱ型存活曲线,种群相对稳定,油蒿呈现出Ⅰ型存活曲线,种群处于不稳定的退化状态。The study of population dynamics is a prerequisite for understanding the current situation of population survival and development dynamics. In this paper,the age structure of sand-fixing shrubs was analyzed and the static life table and survival curve were established based on our survey of the sand-fixing shrubs under three types of sand dunes(i.e. the fixed sand dunes,the semi-fixed sand dunes and the mobile sand dunes)in the Gurbantunggut Desert. We developed the following conclusions:(1)The survival number of sand-fixing shrubs showed a gradual decrease with age-class and high proportion of sand-fixing shrubs population is young individuals in three habitats.(2)On fixed sand dunes:the population survival curves of Haloxylon ammoolenelron was close to Deevey-Ⅰ type which indicated that its population was degonerating;Haloxylon persicum population was close to Deevey-Ⅱ type survival curve,the population was in a dynamic and stable state.(3)On semi-fixed sand dunes:H.persicum belong to Deevey-Ⅱ type survival curve,its population in a relatively stable state;Calligonum mongolicum and Artemesia ordosica all belong to Deevey-Ⅰ type survival curve,which shows that these populations were in a degraded state.(4)On mobile sand dunes:C. mongolicum population presented Deevey-Ⅲtype survival curve,which had great growth potential;H.persicum population presented Deevey-Ⅱ type survival curve,which shows that the population was in a relatively stable state;A.ordosica population presented Deevey-Ⅰ type survival curve,which indicates that the populations was in unstable state of degradation.

关 键 词：古尔班通古特沙漠 种群数量动态 生命表 存活曲线 

分 类 号：P931.3[天文地球—自然地理学]