Li Jingpeng, Zheng Zhirong, Xie Hongtao, Zhao Nianxi, Gao Yubao
College of Life Science Nankai University Tianjin China.
College of Life Science Nankai University Tianjin China; State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing China.
Ecol Evol. 2016 Nov 27;7(1):14-25. doi: 10.1002/ece3.2604. eCollection 2017 Jan.
Increasing attention has been paid to the relationship between biodiversity and ecosystem functioning (BEF) because of the rapid increase in species loss. However, over the past 20 years, most BEF studies only focused on the effect of species diversity on one or a few ecosystem functions, and only a few studies focused on ecosystem multifunctionality (i.e., the simultaneous provision of several ecosystem functions). Grassland ecosystems have important economic, environmental, and esthetic value; thus, this study focused on the heterogeneous microcommunities in grasslands under three management modes. The multifunctionality index () was assessed at community and microcommunity scales, and the relationship between species diversity and multifunctionality was investigated. The communities were found to be respectively composed of one, three, and six microcommunities in grazing, clipping, and enclosure management, based on a two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA) for community structure. Biodiversity and soil indicators showed an apparent degradation of the grazing community, which had the worst . Clipping and enclosure communities showed no significant difference in biodiversity indices, soil variables, and ; however, these indices were clearly different among microcommunities. Therefore, the microcommunity scale may be suitable to investigate the relationship between vegetation and multifunctionality in seminatural grassland ecosystems. Dominant species richness had more explanatory power for ecosystem multifunctionality than subdominant species richness, rare species richness, and the number of all species. Therefore, it is important to distinguish the role and rank of different species in the species richness-multifunctionality model; otherwise, the model might include redundant and unclear information. Communities with more codominant species whose distribution is also even might have better multifunctionality.
由于物种丧失的迅速增加，生物多样性与生态系统功能（BEF）之间的关系受到了越来越多的关注。然而，在过去20年中，大多数BEF研究仅关注物种多样性对一种或几种生态系统功能的影响，只有少数研究关注生态系统多功能性（即同时提供多种生态系统功能）。草原生态系统具有重要的经济、环境和美学价值；因此，本研究聚焦于三种管理模式下草原中的异质微群落。在群落和微群落尺度上评估了多功能性指数（），并研究了物种多样性与多功能性之间的关系。基于群落结构的双向指示种分析（TWINSPAN）和去趋势对应分析（DCA），发现在放牧、刈割和围栏管理中，群落分别由一个、三个和六个微群落组成。生物多样性和土壤指标显示放牧群落明显退化，其 最差。刈割和围栏群落在生物多样性指数、土壤变量和 方面没有显著差异；然而，这些指数在微群落之间明显不同。因此，微群落尺度可能适合研究半自然草原生态系统中植被与多功能性之间的关系。优势种丰富度对生态系统多功能性的解释力比亚优势种丰富度、稀有种丰富度和所有物种数量更强。因此，在物种丰富度 - 多功能性模型中区分不同物种的作用和等级很重要；否则，该模型可能包含冗余和不明确的信息。具有更多共优势种且分布也均匀的群落可能具有更好的多功能性。
