古尔班通古特沙漠沙丘主要灌木的种群数量动态
收稿日期: 2020-07-16
修回日期: 2020-09-23
网络出版日期: 2021-03-26
基金资助
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)
Population dynamics of main sand-fixing shrubs in the Gurbantunggut Desert
Received date: 2020-07-16
Revised date: 2020-09-23
Online published: 2021-03-26
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。
李功麟 , 张定海 , 张志山 , 胡宜刚 , 黄磊 , 路丽宁 . 古尔班通古特沙漠沙丘主要灌木的种群数量动态[J]. 中国沙漠, 2021 , 41(2) : 129 -137 . DOI: 10.7522/j.issn.1000-694X.2020.00103
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-Ⅲ type 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.
Key words: Gurbantunggut Desert; population dynamics; life table; survival curve
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