富营养化水体中光照对沉水植物的影响研究进展

Effects of light on submerged macrophytes in eutrophic water:Research progress

恢复沉水植物是修复富营养化水体和维持水体生态系统健康的关键,其中光照是主要的限制因子.本文系统总结了影响水下光强衰减变化的因素和光强对沉水植物生理的影响机制,重点阐述了常见沉水植物在低光胁迫下体内碳、氮、磷的生理代谢机理,抗氧化酶系统的响应机制以及色素组成和浓度的变化反馈.此外,本文还列举了常用的恢复沉水植物的工程措施,提出了恢复富营养化水体中沉水植物群落的思路.并针对目前研究中存在的不足,就今后该领域的研究方向和侧重点提出建议,为理论研究与工程实践提供参考.

The restoration of submerged macrophytes is the key to remediate eutrophic water and maintain the health of aquatic ecosystem, while light is the main limiting factor. This paper summarized the factors affecting the light extinction in water and the mechanisms of light intensity affecting the physiology of submerged macrophytes, with the focuses on the metabolic mechanisms of carbon, nitrogen, and phosphorus, the responses of antioxidant enzyme system, and the feedbacks of pigment composition and concentration in the common submerged macrophytes under low light stress. Several engineering techniques applied in the ecological restoration of presented, and the framework of the restoration of submerged macrop submerged macrophytes were hytes in eutrophic water was proposed. Some problems in current research and several suggestions on future research were addressed, which could help the related research and engineering practices.