四川师范大学学报（自然科学版）2025，Vol.48Issue(3)：375-382,8.DOI:10.3969/j.issn.1001-8395.2025.03.008
四川省九龙县中国特有种大理白前的群落特征和种间联结
Community Characteristics and Interspecific Associations of the Chinese Endemic Species Cynanchum forrestii Schltr.in Jiulong County
摘要
Abstract
Cynanchum forrestii Schltr.,an endemic and medicinal species in China,occupies a dominant position in alpine mead-ows in the Hengduan Mountains region.To explore the stability and interspecific relationships of the community where C.forrestii is lo-cated,a sample survey method was used to study the community diversity and the interspecific relationships between C.forrestii and 19 species in the herbaceous layer in Ninai valley,Jiulong County,Hengduan Mountains.The results showed that the community where C.forrestii is located had a total of 95 species of vascular plants belonging to 76 genera and 38 families,which comprised 2 National second-level key protected wild plants and 16 endemic plants of China.The geographical distribution type of the genus was mainly com-posed of temperate components.The dominant species in the shrub layer and the herb layer were Berberis and grass,respectively.The shrub layer had few species and low coverage,whereas the herb layer had higher values of the Shannon-Wiener index,Simpson index,and Pielou index than the shrub layer.The variance ratio(VR)of the herb layer was 2.43＞1,and the statistical W-test showed a sig-nificant positive association among the 20 species in the herb layer.C.forrestii showed a positive association with 13 species and a neg-ative association with 7 species.It was significantly positively associated with Halenia spp.and significantly negatively associated with grasses.These results suggested that the community where C.forrestii is located was stable and rich in endemic species,but there was mutual repulsion between C.forrestii and grasses,which may have a certain negative impact on the grazing ecosystem.关键词
大理白前/群落特征/物种多样性/种间联结性Key words
Cynanchum forrestii Schltr/community characteristics/species diversity/interspecies association分类
生物学引用本文复制引用
谢雨思,陈时鑫,马丹炜,杨世辉,聂申明,扎西泽里,田正友..四川省九龙县中国特有种大理白前的群落特征和种间联结[J].四川师范大学学报（自然科学版）,2025,48(3):375-382,8.基金项目
第四次全国中药资源普查(2019PC006)和九龙县中藏药资源调查及研究(HX20220274) （2019PC006）
