草型湖泊水生植物残体的生物降解研究进展

在草型湖泊中,水生高等植物受到湖体内高营养刺激而大量生长。虽然植物的大量生长在短时间内降低了湖体营养盐,提高了透明度,但当水生植物进入衰亡期,其残体在水力和生物的作用下腐解,释放大量的营养物质,进一步加剧湖水中的富营养化状态。腐解后的植物残体会变成泥炭沉积于湖底,易使湖底升高,水位降低,加速湖泊的沼泽化进程。过多的水生植物残体极容易对水生态的平衡造成威胁,因此,本研究详细介绍了水生植物残体在湖泊中的分解机制与影响,探究底栖动物和微生物在植物残体降解中的应用,并提出建议与展望,为植物残体降解修复研究奠定基础。

Biodegradation of Aquatic Plant Residues in Macrophytic Lake: A Review

Aquatic higher plants are growing under the stimulation of high nutrients in macrophytic lakes, and the massive growth of aquatic plants can reduce lake nutrient content and improve water transparency in a short time. However, after aquatic plants entering the decay period, their residues could be decomposed and release a large amount of nutrients under the hydraulic and biological action, aggravating the eutrophication of lake water. Subsequently, the residues will be converted into peat and deposited on the bottom of the lake, which causes the rise of lake bottom and the decline of the water level, and accelerates the paludification of lakes. Excessive aquatic plant residues are very likely to pose a threat to aquatic ecological balance. Therefore, this paper introduced the decomposition mechanism of aquatic plant residues in lakes and the influence factors, and explored the application of zoobenthos and microorganisms in the degradation of plant residues. Finally, suggestions were put forward to lay a foundation for the remediation of plant residue decomposition.