She Yandi, Li Xilai, Li Chengyi, Yang Pengnian, Song Zihan, Zhang Jing
College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China.
Plants (Basel). 2023 Oct 15;12(20):3582. doi: 10.3390/plants12203582.
Plant diversity plays an important role in maintaining the stability of ecosystem functioning. Based on field surveys and indoor analyses, this study investigated the relationship between species diversity and community stability at different stages of bare patch succession in degraded alpine meadow ecosystems. Results show that: (1) Using the ICV (the Inverse of the Coefficient of Variation) method to analyze changes in plant community stability, community stability was generally ranked as follows: Long-term recovered patches > Healthy alpine meadow > Degraded alpine meadow > Short-term recovered patch > Bare Patches. (2) Using factor analysis to construct an evaluation system, the stability ranking based on species diversity was as follows: Healthy alpine meadow > Long-term recovered patches > Degraded alpine meadow > Short-term recovered patches > Bare Patches. (3) The community stability index was significantly positively correlated with vegetation coverage, height, biomass, species richness, Shannon-Wiener diversity index, species evenness, and Simpson's diversity index ( < 0.05). Therefore, a positive correlation exists between plant diversity and community stability, such that plant communities with a higher species diversity tend to be more stable. To maintain the plant diversity and community stability of alpine meadow ecosystems, it is necessary to consider the characteristics of grassland plant composition and community structure, as well as their influencing factors, and promote the positive succession process of grasslands.
植物多样性在维持生态系统功能稳定性方面发挥着重要作用。基于实地调查和室内分析，本研究探讨了退化高寒草甸生态系统中裸斑演替不同阶段物种多样性与群落稳定性之间的关系。结果表明：（1）采用变异系数倒数（ICV）法分析植物群落稳定性变化，群落稳定性总体排序为：长期恢复斑块＞健康高寒草甸＞退化高寒草甸＞短期恢复斑块＞裸斑。（2）利用因子分析构建评价体系，基于物种多样性的稳定性排序为：健康高寒草甸＞长期恢复斑块＞退化高寒草甸＞短期恢复斑块＞裸斑。（3）群落稳定性指数与植被盖度、高度、生物量、物种丰富度、香农-威纳多样性指数、物种均匀度和辛普森多样性指数显著正相关（＜0.05）。因此，植物多样性与群落稳定性之间存在正相关关系，即物种多样性较高的植物群落往往更稳定。为维持高寒草甸生态系统的植物多样性和群落稳定性，有必要考虑草地植物组成和群落结构特征及其影响因素，促进草地的正向演替进程。
