四川林业科技2024，Vol.45Issue(5)：85-91,7.DOI:10.12172/202404280001
高寒草地不同退化类型对植物多样性与种间关系的影响研究—以理县为例
Study on the effects of different degradation types on plant diversity and interspecific relationship in alpine grassland:a case study in Lixian County
摘要
Abstract
The structure of plant communities and interspecific relationships are the main indicators for assessing degradation in grasslands.Base on the evaluation of grassland health and degradation in Lixian County,Sichuan Province,the species diversity,interspecific association and niche breadth of the sampling plots in grasslands under different types of degradation were analyzed and investigated,and the interactions and interspecific relationships among species were discussed,which was helpful for the scientific restoration and rational utilization of these alpine grasslands.The results showed that there were 145 plant species belonging to 37 families and 106 genera in Lixian survey area,among which Deyeuxia scabrescens,Artemisia stechmanniana,and Poa annua were the top three dominant species.In toxicologically degraded grasslands,the niche overlap value of toxic grass and native species increased,which aggravated the competition between species and made the connection relationship closer than that of other degraded types.Conversely,in the degraded grassland of rocky desert type,the number of niche overlap of main species was the lowest,and many plant species were loosely connected.The AC alue of interspecific association was mainly negative,which was distinctly different from undegraded and toxicologically degraded grasslands.Therefore,different restoration measures should be adopted for two different types of degraded grasslands,and sustainable restoration should be realized according to local conditions and time.关键词
草地退化/种间联结性/生态位Key words
grassland degradation/interspecific connectivity/ecological niche引用本文复制引用
黄波,王悦,邓小兵,杨金亮,陈安全,崔琮镒,刁雪,李旭华..高寒草地不同退化类型对植物多样性与种间关系的影响研究—以理县为例[J].四川林业科技,2024,45(5):85-91,7.基金项目
四川省林草科技创新团队项目(2024LCTD0305) （2024LCTD0305）
