江西农业学报2025，Vol.37Issue(6)：24-31,8.DOI:10.19386/j.cnki.jxnyxb.2025.06.005
河西走廊沙地人工梭梭林草本植物种群生态位特征
Niche Characteristics of Herbaceous Plant Community of Artificial Haloxylon ammodendron Plantation in Sandy Land of Hexi Corridor
摘要
Abstract
In order to understand the ecological characteristics and community stability of the herbaceous layer of artificial Haloxylon ammodendron forest in Hexi Corridor,and provide a theoretical basis for the protection and restoration of the artificial Haloxylon ammodendron forest community in Hexi Corridor,on the basis of the community survey,the ecological niche characteristics and community stability of herbaceous plant populations in the community were studied by indicators such as species importance value,Levins niche breadth,Pianka niche overlap,niche similarity index and M.Codron stability.The results showed that:(1)In the herbaceous plant community of artificial Haloxylon ammodendron forest,there were 14 species of herbaceous plants belonging to 4 families and 12 genera,and Bassia dasyphylla had a higher importance value and frequency than the other species,and was the dominant species in the community.(2)Among the herbaceous layer plants of artificial Hal-oxylon ammodendron forest in Hexi Corridor,Bassia dasyphylla occupied the largest niche breadth(0.8616),indicating that its ecological adaptive range was broader and it played an important role in the herbaceous plant population.(3)There were 33 pairs of species with a niche overlap value of 0 to 0.4,accounting for 36.26%of the total number of species pairs,and 39 pairs of species with a niche overlap value of 0,accounting for 42.86%of the total number of species pairs.The niche overlap and niche similarity ratios between species were generally low,niche differentiation was obvious,there were large differences in the demand for habitat resources among species,and interspecific competition was weak.(4)The stability of the herbaceous layer population was close to 20/80,which was in a relatively stable state.The study showed that Bassia dasyphylla occupied a dominant position in the entire community and had a strong competitive advantage,but the degree of niche differentiation within the community was obvious,the competition between species was weaker,and the community structure was more stable.关键词
人工梭梭林/草本层/生态位特征/群落稳定性/河西走廊沙地Key words
Artificial Haloxylon ammodendron plantation/Herbaceous layer/Niche characteristics/Community stability/Hexi Corridor sandy land分类
农业科技引用本文复制引用
苏付荣,占玉芳,鲁延芳,何靖,李红菊..河西走廊沙地人工梭梭林草本植物种群生态位特征[J].江西农业学报,2025,37(6):24-31,8.基金项目
国家自然科学基金项目(31560240) （31560240）
甘肃省自然科学基金项目(25JRRG042) （25JRRG042）
甘肃省林业和草原局科技计划项目(2022kj008). （2022kj008）
