德夯地质公园林溪交错带草本群落优势种生态位及种间联结  

Niches and community stability of dominant herbaceous species in theforest and creek ecotone of Dehang Geopark

作　　者：龙姿羽 王志成 赵蕊 刘冰[1] 陈功锡[1,2] LONG Ziyu;WANG Zhicheng;ZHAO Rui;LIU Bing;CHEN Gongxi(National and Local United Engineering Laboratory of Integrative Utilization of Eucommia Ulmoides,Jishou University,Jishou,Hunan 416000,China;Rural Revitalization and Regional Development Research Center of Wuling Mountain Area,Jishou,Hunan 416000,China)

机构地区：[1]吉首大学杜仲综合利用技术国家地方联合工程实验室,湖南吉首416000 [2]武陵山区乡村振兴与区域发展研究中心,湖南吉首416000

出　　处：《西北植物学报》2024年第12期1954-1964,共11页Acta Botanica Boreali-Occidentalia Sinica

基　　金：吉首市德夯风景区管理处科研项目(19DHK03)。

摘　　要：【目的】探究德夯地质公园林溪交错带草本群落的优势种生态位特征、种间联结性及群落稳定状态,以期为该区域的草本群落保护以及可持续发展提供理论基础。【方法】选取生态位测定、方差比率法、χ2检验、Spearman秩相关系数、联结系数对3条溪中的草本群落优势种进行分析。【结果】(1)九龙溪与玉泉溪中透茎冷水花生态位最宽,夯峡溪则是小赤麻生态位最宽。3条溪的生态位重叠指数普遍偏小,说明优势物种种间竞争较弱,对环境资源的需求相似性不大。(2)3条溪草本植物总体关联性与种间关联均以不显著负联结为主,种间联结性较低,多为独立分布。(3)群落目前尚处于不稳定状态,且草本群落的演替发展受群落内部与群落外部的共同影响。【结论】德夯地质公园林溪交错带草本群落优势种间关联弱,物种独立分布,群落处于不稳定状态。[Objective]The study aims to explore the characteristics of ecological niche,interspecific connectivity,and community stability of dominant species in the herbaceous community of the forest and creek ecotone in Dehang Geopark,with the expectation of providing a theoretical foundation for the protection of the herbaceous communities and sustainable development in the area.[Methods]The authors employed a suite of analytical methods including niche determination,variance ratio,Chi-square test,Spearman rank correlation test,and association coefficient to examine the ecological niches and interspecific associations of the dominant herbaceous species within three creeks in Dehang Geopark.[Results](1)In the Jiulong Creek and Yuquan Creek,Pilea pumila occupies the widest ecological niche,whereas in the Hangxia Creek,Boehmeria spicata has the broadest ecological niche.The average ecological niche overlap indices for Jiulong Creek,Hangxia Creek,and Yuquan Creek are generally low.This indicates that the interspecific competition among dominant species in the herbaceous communities of the forest and creek ecotone is weak, and there is not a high degree of similarity in the demand for environmental resources. (2)The overall and interspecific associations of the herbaceous plants in the three streams are mainly characterizedby non-significant negative connections, with relatively low interspecific connectivity, and aremostly independently distributed. (3) The community is currently in an unstable state, and the successionand development of the herbaceous community are influenced by both internal and external factors of thecommunity. [Conclusion] In Dehang Geopark, the herbaceous community in the forest and creek ecotonehas weak interspecific associations, with species being independently distributed, indicating that the communityis in an unstable state.

关 键 词：林溪交错带 草本植物 生态位 种间联结 德夯地质公园 

分 类 号：Q948.12[生物学—植物学]