气候变化领域集成服务门户(CCPortal): Freshwater wetland restoration and conservation are long-term natural climate solutions

CCPortal

DOI	10.1016/j.scitotenv.2024.171218
	Freshwater wetland restoration and conservation are long-term natural climate solutions
	Schuster, Lukas; Taillardat, Pierre; Macreadie, Peter I.; Malerba, Martino E.
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	922
卷号	922
英文摘要	Freshwater wetlands have a disproportionately large influence on the global carbon cycle, with the potential to serve as long-term carbon sinks. Many of the world's freshwater wetlands have been destroyed or degraded, thereby affecting carbon -sink capacity. Ecological restoration of degraded wetlands is thus becoming an increasingly sought-after natural climate solution. Yet the time required to revert a degraded wetland from a carbon source to sink remains largely unknown. Moreover, increased methane (CH4) and nitrous oxide (N2O) emissions might complicate the climate benefit that wetland restoration may represent. We conducted a global meta -analysis to evaluate the benefits of wetland restoration in terms of net ecosystem carbon and greenhouse gas balance. Most studies (76 %) investigated the benefits of wetland restoration in peatlands (bogs, fens, and peat swamps) in the northern hemisphere, whereas the effects of restoration in non -peat wetlands (freshwater marshes, non -peat swamps, and riparian wetlands) remain largely unexplored. Despite higher CH4 emissions, most restored (77 %) and all natural peatlands were net carbon sinks, whereas most degraded peatlands (69 %) were carbon sources. Conversely, CH4 emissions from non -peat wetlands were similar across degraded, restored, and natural non -peat wetlands. When considering the radiative forcings and atmospheric lifetimes of the different greenhouse gases, the average time for restored wetlands to have a net cooling effect on the climate after restoration is 525 years for peatlands and 141 years for non -peat wetlands. The radiative benefit of wetland restoration does, therefore, not meet the timeframe set by the Paris Agreement to limit global warming by 2100. The conservation and protection of natural freshwater wetlands should be prioritised over wetland restoration as those ecosystems already play a key role in climate change mitigation.
英文关键词	Radiative forcing; Net radiative cooling effect; Greenhouse gas fluxes; Net ecosystem exchange; Carbon sequestration; Freshwater wetland; Teal carbon; Restoration; Conservation; Nature-based solutions
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001211332600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302841
作者单位	Deakin University; National University of Singapore
推荐引用方式 GB/T 7714	Schuster, Lukas,Taillardat, Pierre,Macreadie, Peter I.,et al. Freshwater wetland restoration and conservation are long-term natural climate solutions[J],2024,922.
APA	Schuster, Lukas,Taillardat, Pierre,Macreadie, Peter I.,&Malerba, Martino E..(2024).Freshwater wetland restoration and conservation are long-term natural climate solutions.SCIENCE OF THE TOTAL ENVIRONMENT,922.
MLA	Schuster, Lukas,et al."Freshwater wetland restoration and conservation are long-term natural climate solutions".SCIENCE OF THE TOTAL ENVIRONMENT 922(2024).