Key processes of carbon cycle and sink enhancement paths in natural wetland ecosystems in China

IF 6 2区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Science China Earth Sciences Pub Date : 2024-07-08 DOI:10.1007/s11430-023-1347-8
Jinshuai Li, Tianxiang Hao, Meng Yang, Guirui Yu
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Abstract

Wetland ecosystems have become one of the long-term solutions for mitigating global climate change due to their strong carbon sequestration potential. However, the key carbon cycle processes in wetland ecosystems still lack a systematic summary. In the context of wetland protection and restoration, there is still a lack of consensus on the technical pathways to realize carbon sink multiplication in wetland ecosystems. In this paper, the key processes of carbon cycle, such as photosynthetic carbon uptake, microbial carbon decomposition and carbon deposition and burial, are sorted out and summarized in four major wetland types, namely, swamp and peat wetlands, river and riparian wetlands, lake and lakeshore wetlands, and estuarine and coastal wetlands. Based on the key processes of carbon cycle, three technological pathways for carbon sink multiplication are proposed, including, vegetation carbon sequestration and sink enhancement technology, soil carbon emission reduction technology and carbon deposition and burial technology. The key technologies under each pathway are further refined. And the carbon sink effects of the carbon sink technologies in different wetland types are qualitatively described. Also, wetland protection and restoration methods in corresponding regions are given in the light of the regional characteristics of wetlands in China. This will provide a scientific basis for the strategy of doubling the carbon sinks of China’s wetland ecosystems.

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中国自然湿地生态系统碳循环关键过程与碳汇增强路径
湿地生态系统因其强大的固碳潜力而成为减缓全球气候变化的长期解决方案之一。然而,湿地生态系统的关键碳循环过程仍缺乏系统总结。在湿地保护与恢复的背景下,实现湿地生态系统碳汇增殖的技术途径仍缺乏共识。本文梳理并总结了沼泽与泥炭湿地、河流与河岸湿地、湖泊与湖滨湿地、河口与滨海湿地四大湿地类型的光合碳吸收、微生物碳分解、碳沉降与埋藏等碳循环关键过程。根据碳循环的关键过程,提出了三种碳汇增殖技术途径,包括植被固碳增汇技术、土壤碳减排技术和碳沉降与埋藏技术。并进一步细化了每种途径下的关键技术。并定性描述了碳汇技术在不同湿地类型中的碳汇效应。同时,结合中国湿地的区域特点,给出了相应区域的湿地保护与恢复方法。这将为中国湿地生态系统碳汇翻番战略提供科学依据。
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来源期刊
Science China Earth Sciences
Science China Earth Sciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
9.60
自引率
5.30%
发文量
135
审稿时长
3-8 weeks
期刊介绍: Science China Earth Sciences, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research.
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