JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (6): 157-166.doi: 10.12302/j.issn.1000-2006.202209031

Special Issue: 南京林业大学120周年校庆特刊

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Ecological restoration technologies for lake wetlands for carbon peaking and neutrality

LI Wei1,2(), LI Jiping1,2, ZHANG Yinlong1,2, LI Pingping1,2, HAN Jiangang1,2,*()   

  1. 1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
    2. National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province, Huai’an 223100, China
  • Received:2022-09-15 Revised:2022-10-11 Online:2022-11-30 Published:2022-11-24
  • Contact: HAN Jiangang E-mail:uwliwei@163.com;hanjiangang76@126.com

Abstract:

Lake wetlands are the important part of wetlands in China, which plays an important role in reducing carbon emissions and mitigating global climate warming. However, the degradation of lake wetlands caused by global climate change and human activities limits the carbon sink function of wetlands. The status and causes of lake wetland degradation in China were combed, the effects of land use changes, biodiversity reduction and environmental pollution on the carbon sinks function of lake wetlands were analyzed, and the common lake wetland ecological restoration technology and the approaches to increase the carbon storage were summarized in this study. (1) Water environment remediation technology can improve wetland plants and soil carbon storage by removing endogenous and exogenous pollutants, improving the water quality of lake wetlands, and slowing down greenhouse gas emissions, and improve wetland plants and soil carbon storage. (2) Bioremediation technology can directly increase plant carbon storage, and then improve soil/sediment carbon storage through plant source carbon input and microbial action. Hydrologic and habitat restoration technologies can create favorable water levels and habitat conditions for bioremediation. The research about the biodiversity and its collaborative relationship and mechanisms with carbon sinks of lake wetlands, the impact of water quality on the carbon evolution of lake wetlands, the saturation carbon sink, and the measurement and approval system of lake wetlands should be further studied. The results are expected to provide a scientific basis for achieving the carbon peaking and neutrality goals of China.

Key words: lake wetland, carbon sink, degraded ecosystem, vegetation restoration, ecological restoration

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