摘要
为深入了解卡拉麦里国家公园典型区域植被的物种特征及种间关系,加深对该区域植被动态和生态关系的理解,更好地为公园的植被动态分析研究提供理论基础,以该公园典型区——过渡带区域的灌木层物种为研究对象,在过渡带设置200 m×300 m(60000 m^(2))的典型调查样地,在调查过程中将其划分为20 m×30 m(600 m^(2))的100个样方,采用由南到北、由西向东“Z”字形调查法,记录样方内灌木层的每株样木名称、位置、株高、南北冠幅、东西冠幅、高程等信息。结果表明:过渡带共记录灌木8种,其中梭梭占据绝对优势,其重要值达49.85%,生态位宽度为0.4688,显著高于其他物种。大部分物种的株高与冠幅呈正相关,其中盐穗木与梭梭呈极显著正相关(r=0.61,P<0.01;r=0.52,P<0.01)。高程对物种分布具有明显分异作用。生态位重叠分析表明,不重叠物种对占总物种对数的35.71%,即种间竞争较弱。整体联结性检验呈不显著负关联(χ^(2)=1.1584,P>0.05),表明群落结构松散、稳定性较低,尚未达到顶级演替状态,这与其生境条件较为恶劣且呈现一定的地带性有关。
This study investigated the species characteristics and interspecific relationships of the vegetation in the typical area of Kalamaili National Park,aiming to deepen the understanding of the dynamics and relationships of the vegetation in the area and provide a theoretical basis for revealing the vegetation dynamics of this park.A typical survey sample plot of 200 m×300 m 60000 m^(2)was set in the ecotone.During the survey,it was divided into 100 quadrats of 20 m×30 m 600 m^(2).A“Z”-shaped survey was conducted from the south to the north and from the west to the east.The name,location,plant height,north-south and east-west crown widths,and elevation of each shrub individual in the quadrats were recorded.The results showed that a total of 8 shrub species were recorded in the ecotone,with Haloxylon ammodendron being the absolute dominant species,having an importance value of 49.85%and a niche width of 0.4688,which were significantly higher than those of other species.The plant height of most species was positively correlated with the crown width,which was extremely significant in Halostachys caspica and H.ammodendron(r=0.61,P<0.01;r=0.52,P<0.01).Elevation had a significant differentiating effect on species distribution.Niche overlap analysis showed that non-overlapping species pairs accounted for 35.71%of the total pairs,indicating weak interspecific competition.The overall connectivity test showed a non-significant negative correlationχ^(2)=1.1584,P>0.05,indicating a loose community structure and low stability,which had not yet reached a climax succession state.This is related to the relatively harsh habitat conditions and certain zonal distribution.
作者
杨茨
肖慧
全伟琳
玉米提·哈力克
田奥磊
YANG Ci;XIAO Hui;QUAN Weilin;HALIK müt;TIAN Aolei(College of Ecology and Environment,Xinjiang University,Urumqi,Xinjiang 830017,China;Xinjiang Uygur Autonomous Region Forestry and Grassland Survey and Planning Institute,Urumqi,Xinjiang 830049,China;Key Laboratory of Oasis Ecology of Ministry of Education,Urumqi,Xinjiang 830017,China)
出处
《森林与环境学报》
北大核心
2026年第2期160-168,共9页
Journal of Forest and Environment
基金
2024年自治区林草科技项目“卡拉麦里国家公园典型区域荒漠植被动态研究”(XJLYKJ-2024-05)。
关键词
卡拉麦里国家公园
过渡带
灌木层
生态位
种间联结
Kalamaili National Park
ecotone
shrub layer
niche
interspecific association
