我国水生态系统完整性研究的重大意义、现状、挑战与主要任务
Significance, current situation, challenges and future direction and development on the researches of ecological integrity for fresh waters in China
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摘要: 水生态系统完整性研究是当今国际前沿和热点,提升水生态系统健康和质量稳定性已成为世界各国和我国水生态环境质量改善和生态保护的目标、方向和管理策略。“十三五”以来,我国地表水环境质量改善效果显著,但部分流域或局部水生态退化、生态破坏和服务功能下降等问题成为突出短板。强调水生态系统整体保护、促进水生态系统质量全面改善、提高生态系统自我修复能力和稳定性将是未来我国水生态环境保护的趋势和重点任务。本文详细剖析了典型流域水生态系统保护现状和需求,总结了我国开展水生态系统完整性研究的重大意义与支撑作用,系统总结了完整性研究国际进展和应用实践,分析了当前我国完整性研究面临的挑战、主要科学问题,提出了未来发展思路与重点任务。加快研发完整性监测评价、退化诊断、修复与调控新技术新方法,建立多尺度完整性评价理论,建立物理、化学和水生生物多要素统筹的完整性监测与评价技术体系;定期评估典型流域完整性状况,摸清水生态家底及演变趋势;突破完整性退化诊断与修复调控新技术,厘清退化机制及驱动因子,阐明气候变化与人类活动复杂压力下退化水生态系统修复路径和调控策略,提升水生态系统保护修复的科学性、精准性和有效性,加快推动我国水生态环境管理制度迈上新台阶,为恢复和维持重点流域水生态系统原真性和完整性提供科技支撑。Abstract: The study on ecological integrity has become an international hotspot. Improving the health and quality stability of aquatic ecosystem has been adopted as the ultimate management goal, direction and strategies worldwide. Since the “13th Five-Year Plan”, the quality of surface water has been significantly improved in China. However, the degradation, destruction and service function decline of aquatic ecosystem have been prominent shortcomings in typical watersheds. The overall conservation for physical, chemical and biological integrity should be emphasized for the future management of ecosystem. The amelioration of water quality and restoring the resilience and stability of aquatic ecosystem will be the vital goals and tasks for protection of freshwater ecosystems in China. In this review, the current status and demands for ecosystem conservation in typical watershed was firstly summarized. The significance of the researches of ecological integrity for fresh waters in China was elucidated. Then, the international progress and application practice of ecological integrity from foreign countries were demonstrated. The challenges and deficiencies were also highlighted for the present achievements of ecological integrity researches in China. Finally, the fundamental goal of this review was to guide the future developments and propose directions of ecological integrity studies in China. New technologies and methods for ecological integrity monitoring and assessment, degradation diagnosis, restoration and regulation should be expedited. The theories for multi-scale ecological integrity assessment need to be developed. Techniques for ecological integrity monitoring and assessment that integrates physical, chemical and aquatic biological metrics will be established in China. The ecological integrity assessment should be carried out periodically to grasp the ecosystem background and evolution trend for typical watersheds. The new methods for degradation diagnosis and restoration of ecological integrity need to be proposed to clarify the degradation mechanism and driving factors. It is also urgent to put forward the restoration pathway and regulation strategies for degraded aquatic ecosystems under the complex stress of climate change and human activities, which is beneficial to improve the scientificity, accuracy, and effectiveness for protection and restoration of freshwater ecosystem. Researches of ecological integrity are fundamental to speed up management and protection of aquatic ecosystem in China to enter to a new era, and to support the restoring and maintaining of freshwater ecosystems integrity and background.
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Key words:
- ecological integrity /
- assessment /
- degradation /
- ecological restoration
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