巴丹吉林沙漠南缘沙地芦苇种群生态特征  

Population ecological features of Phragmites australis in sandy habitats on the southern edge of Badain Jaran Desert

作　　者：刘鑫 焦健[3] 王婷 张玲豫 李朝周[1,2] LIU Xin;JIAO Jian;WANG Ting;ZHANG Lingyu;LI Chaozhou(College of Life Science and Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Key Laboratory of Crop Genetics and Germplasm Enhancement,Lanzhou 730070,Gansu,China;College of Forestry,Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学生命科学技术学院,甘肃兰州730070 [2]甘肃省作物遗传改良和种质创新重点实验室,甘肃兰州730070 [3]甘肃农业大学林学院,甘肃兰州730070

出　　处：《干旱区研究》2022年第1期220-229,共10页Arid Zone Research

基　　金：国家自然科学基金(41967057)。

摘　　要：对天然分布在巴丹吉林沙漠南缘2种沙地生境(盐渍沙地、普通沙地)芦苇(Phragmites australis)分株种群的构件特征、种群年龄结构、动态特征及种群空间分布格局进行调查,研究表明:(1)盐渍沙地土壤含水量和含盐量都显著大于普通沙地,普通沙地芦苇的株高、生物量以及各构件的生物量整体上都高于盐渍沙地的芦苇,土壤含水量和含盐量是该地区芦苇形态特征差异的重要驱动因素。(2)不同生境样地因土壤条件及种间竞争程度的差异,芦苇种群呈现出不同的年龄结构以及数量动态变化,普通沙地芦苇种群趋向于衰退型,盐渍沙地芦苇种群表现为增长型。(3)普通沙地中芦苇种群空间分布格局在0~4 m尺度上表现为聚集分布,在大于4 m的尺度上表现为随机分布;盐渍沙地的函数值基本都在2条包迹线之间,在0~10 m的尺度内均为随机分布。The structural characteristics,age structure,dynamic characteristics,and spatial distribution pattern of Phragmites australis in two types of sandy habitat in the southern margin of Badain Jaran Desert were investigated.Results showed that the following.(1)The plant height,total biomass,and biomass of each component of Phragmites australis in common sandy land were higher than those in saline sandy land.Soil water content and salt content were the important driving factors for the differences in Phragmites australis morphological characteristics in this area.(2)Due to the different soil conditions and the different degrees of interspecies competition,different age structures and dynamic change trends were shown in different sample plots;in common sandy soil,the Phragmites australis population tended to decline,whereas the population of Phragmites australis in saline sand soil tended to increase.(3)The spatial pattern of the Phragmites australis population in the common sandy habitat had an aggregated distribution on a scale of 0-4 m and a random distribution on a scale>4 m.However,the function values of the saline sandy habitat were generally between two enveloped trace lines and distributed randomly on a scale from 0 to 10 m.

关 键 词：巴丹吉林沙漠 沙地 芦苇种群 构件特征 年龄结构 数量动态 空间分布格局 

分 类 号：Q948[生物学—植物学]