我国土壤线虫区系对生态恢复效应指示作用研究进展

Indicator functions of soil nematode guilds to ecological restoration in China: a review

  • 摘要: 在全球变化与人类活动不断加剧的背景下, 生态恢复已成为实现可持续发展的关键途径。当前生态恢复成效评估体系涵盖多类指标, 其中土壤线虫因其对环境变化的高敏感性和功能指示性, 被广泛应用于生态系统恢复的动态监测与评价。本文系统综述了我国不同生态恢复措施(如植被恢复、土壤改良和管理措施)对土壤线虫群落结构、多样性和生态指数的影响, 阐明了线虫群落在恢复过程的响应规律及其指示功能。研究表明, 线虫群落组成能够反映生态系统恢复的演替梯度, 其结构由富集型向结构型群落转变, 表现出群落复杂性与成熟度的提升。其中, 富集指数(EI)和结构指数(SI)对土壤养分富集水平和食物网结构复杂性高度敏感, 可作为核心评价指标; 而通道指数(CI)与线虫代谢足迹(NMF)能够进一步揭示有机质分解途径和功能恢复水平。本文认为, 将线虫功能团和代谢足迹与多样性指数结合分析, 可更全面反映生态系统的结构与功能恢复过程。未来研究应: (1)整合分子生物学与形态学技术, 完善线虫鉴定体系; (2)构建多指标分析框架, 揭示线虫与土壤微生物及理化性质间的相互作用机制; (3)针对不同退化生态系统筛选特异性响应的线虫指示类群, 为生态恢复效果评价与适应性管理提供科学依据。本研究可为退化生态系统恢复成效评价与生物指示体系构建提供科学依据。

     

    Abstract: Under the intensifying influence of global change and human activities, ecological restoration has emerged as a crucial strategy for achieving sustainable development goals. Current evaluation systems for assessing restoration effectiveness integrate multiple indicators across ecological, physical, and biological domains. Among these, soil nematodes have been widely applied in dynamic monitoring and evaluation of ecosystem restoration due to their exceptional sensitivity to environmental changes and strong functional indicative properties. As key members of soil fauna, nematodes occupy diverse trophic positions within soil food webs and exhibit rapid responses to alterations in soil conditions, making them particularly valuable as bioindicators of ecosystem health and restoration progress. This paper systematically reviews how various ecological restoration measures implemented across different regions of China, including vegetation restoration, soil amelioration practices, and adaptive management strategies, affect soil nematode community structure, diversity patterns, and ecological indices. The review synthesizes current knowledge on the response patterns of nematode communities throughout restoration processes and critically evaluates their advantages and limitations as biological indicators. The findings reveal that nematode ecological indices are becoming increasingly diverse for assessing ecosystem structure and function. Among the various nematode-based ecological indices, the enrichment index (EI) and structure index (SI) show particularly high sensitivity to soil nutrient enrichment levels and food web structural complexity, respectively, establishing them as core evaluation indicators for restoration assessment. Additionally, the channel index (CI) provides insights into organic matter decomposition pathways by quantifying the relative importance of bacterial versus fungal energy channels, while metabolic footprint of nematodes (NMF) quantifies the level of ecosystem functional recovery from the perspective of energy flow. These complementary indices together provide a comprehensive framework for evaluating both structural and functional aspects of ecosystem recovery. This review emphasizes that integrating nematode functional guild analysis and metabolic footprint assessments with traditional diversity indices enables more holistic evaluation of ecosystem structural and functional restoration processes. Future research directions should focus on: (1) integrating advanced molecular biological techniques with traditional morphological approaches to establish more comprehensive and accurate nematode identification systems; (2) developing multi-indicator analytical frameworks that clarify complex interactions among nematode communities, soil microbial populations, and physicochemical properties; and (3) identifying nematode indicator taxa exhibiting specific responses to different types of degraded ecosystems, thereby providing scientific foundations for evaluating ecological restoration effectiveness and implementing adaptive management strategies. This study provides scientific evidence for assessing restoration outcomes in degraded ecosystems and constructing robust biological indicator systems for long-term monitoring programs.

     

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