塔里木河中下游胡杨与柽柳种群空间分布格局及关联性  

Spatial Distribution Pattern and Interspecific Association of Populus euphratica and Tamarix ramosissima Populations in the Middle and Lower Reaches of Tarim River

作　　者：罗怡 赵志欣 黄志凯 管文轲[3] 霍艾迪 易秀[2] 杨磊[2] Luo Yi;Zhao Zhixin;Huang Zhikai;Guan Wenke;Huo Aidi;Yi Xiu;Yang Lei(Shaanxi Public Resource Trade Center,Xi’an 710065,P.R.China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region,Ministry of Education,Chang’an University;Xinjiang Academy of Forestry)

机构地区：[1]陕西省公共资源交易中心,西安710061 [2]旱区地下水文与生态效应教育部重点实验室(长安大学) [3]新疆林业科学院

出　　处：《东北林业大学学报》2021年第11期45-50,共6页Journal of Northeast Forestry University

基　　金：国家自然科学基金面上项目(41877232);塔里木河中下游胡杨生态修复研究与示范项目(2017-HY);宁夏自然科学基金项目(2020AAC03476)。

摘　　要：为了揭示塔里木河中下游生态输水后胡杨与柽柳种群空间分布格局及关联性变化特征。以塔里木河中下游荒漠河岸植被建群种胡杨(Populus euphratica)和柽柳(Tamarix ramosissima)为研究对象,采用相邻格子法进行实地调查,并通过3个样地的6种不同取样尺度(10 m×10 m、10 m×20 m、10 m×30 m、20 m×20 m、20 m×30 m、20 m×50 m)计算方差与均值的比率以及5种聚集度指标,分析胡杨与柽柳种群的空间分布格局,同时利用2×2列联表χ^(2)统计量、联结系数和共同出现百分率等测度方法,计算2个物种联结的性质和程度。结果表明:胡杨和柽柳种群的空间分布均呈显著的聚集分布;在胡杨、柽柳群落中,种间联结系数小于1,共同出现的百分率大于0,胡杨与柽柳呈现种间负联结,且联结程度随着生境的恶化而增强,种间竞争激烈。因此,本研究结果可为该区域防风固沙、水土保持和生物多样性等生态服务功能提供技术支持,也为系统评估和改进生态输水方案提供科学依据。In order to reveal the spatial distribution pattern and correlation characteristics of Populus euphratica and Tamarix ramosissima populations after ecological water conveyance in the middle and lower reaches of Tarim River.With P.euphratica and T.ramosissima in desert riparian vegetation in the middle and lower reaches of Tarim River,the field investigation was carried out by the adjacent grid method.The methods such as V/m ratio t-test,negative binomial parameter,clump index,Green index,mean crowding intensity,index of patchiness were used to analyze the spatial distribution pattern of P.euphratica and T.ramosissima in three sites with six different sampling scales(10 m×10 m,10 m×20 m,10 m×30 m,20 m×20 m,20 m×30 m,and 20 m×50 m).Based on 2×2 contingency table,the interspecific associations of the two species were examined by means ofχ^(2)-test,together with the association coefficient and percentage co-occurrence.The spatial distribution of P.euphratica and T.ramosissima of the three sites showed a significant cluster distribution pattern,indicating that the cluster distribution was a basic property in the spatial distribution pattern of P.euphratica and T.ramosissima;the two species showed negative interspecific association,and the degree of association increased with the deterioration of habitat,and the interspecific struggle was intense.

关 键 词：胡杨 柽柳 空间分布格局 种间关联 塔里木河流域 

分 类 号：Q948.1[生物学—植物学]