森林与环境学报2025，Vol.45Issue(4)：386-394,9.DOI:10.13324/j.cnki.jfcf.202412023
塔里木河下游胡杨林粗木质残体干物质储量及其空间格局
Dry matter storage and spatial distribution patterns of coarse woody debris in the Populus euphratica forest in the lower reaches of Tarim River
摘要
Abstract
The aim of this study is to gain an in-depth understanding of the dry matter storage and spatial distribution patterns of coarse woody debris(CWD)of Populus euphratica under extreme arid conditions and enhance our comprehension of the stability and multifunctionality of forest ecosystems under drought stress.The natural P.euphratica forest in the lower reaches of the Tarim River was selected as the study area.Four 100 m×100 m CWD sampling plots were arranged at different distances(200,450,750,and 1 100 m)from the river channel.The adjacent grid method and point pattern analysis were employed to investigate P.euphratica CWD of varying types,diameter classes,and decomposition levels.The results indicated that the density of P.euphratica CWD ranged from 74 to 119 plant·hm-2 and the dry matter storage ranged from 2.89 to 11.59 t·hm-2.Dead-and-down trees,large-diameter CWD,and moderately decomposed CWD were the predominant forms.As the distance from the river channel increased,the overall spatial distribution of P.euphratica CWD gradually shifted from an aggregated distribution pattern on small scales(0-3 m)to a random distribution pattern.Only the large-diameter CWD exhibited a clear aggregated distribution pattern on the specific spatial scales(0-3 m).Despite a tendency toward aggregation on the same scale,other forms of CWD generally displayed a random distribution pattern.The low dry matter storage of P.euphratica CWD was positioned at the lower limit of the range observed in Chinese forests.The spatial distribution pattern of P.euphratica CWD with distance from the river channel are closely related to the water and heat conditions as well as interspecific competition observed along the Arghan monitoring transect.关键词
塔里木河/胡杨/粗木质残体/干物质储量/空间格局Key words
Tarim River/Populus euphratica/coarse woody debris(CWD)/dry matter storage/spatial distribution pattern分类
林学引用本文复制引用
陈凯旋,阿地里·吾加西,玉米提·哈力克,魏志成,马映栋,艾力甫达尔·阿尔肯..塔里木河下游胡杨林粗木质残体干物质储量及其空间格局[J].森林与环境学报,2025,45(4):386-394,9.基金项目
国家自然科学基金项目"多重胁迫下胡杨林衰退及个体死亡驱动机制研究"(32260285) （32260285）
科技部第三次新疆综合科学考察课题"塔里木河流域断流区及罗布泊地区生态退化状况调查"(2022xjkk0301). （2022xjkk0301）
