气候变化领域集成服务门户(CCPortal): Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands

CCPortal

DOI	10.1038/s41561-022-01070-6
	Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands
	Noyce, Genevieve L. L.; Smith, Alexander J. J.; Kirwan, Matthew L. L.; Rich, Roy L. L.; Megonigal, J. Patrick
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	63
结束页码	+
卷号	16 期号:1 页码:11
英文摘要	Warming temperatures and elevated CO2 are inextricably linked global change phenomena, but they are rarely manipulated together in field experiments. As a result, ecosystem-level responses to these interacting facets of global change remain poorly understood. Here we report on a four-year field manipulation of warming and elevated CO2 in a coastal wetland. Contrary to our expectations, elevated CO2 combined with warming reduced the rate of carbon accumulation due to increases in plant-mediated oxygen flux that stimulated aerobic decomposition via oxygen priming. Evidence supporting this interpretation includes an increase in soil redox potential and a decrease in the nominal oxidation state of the dissolved organic carbon pool. While warming alone stimulated methane (CH4) emissions, we found that elevated CO2 combined with warming reduced net CH4 flux due to plant-microbe feedbacks. Together, these results demonstrate that ecosystem responses to interacting facets of global change are mediated by plant traits that regulate the redox state of the soil environment. Thus, plant responses are critical for predicting future ecosystem survival and climate feedbacks.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000909504400002
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272495
作者单位	Smithsonian Institution; Smithsonian Environmental Research Center; William & Mary; Virginia Institute of Marine Science
推荐引用方式 GB/T 7714	Noyce, Genevieve L. L.,Smith, Alexander J. J.,Kirwan, Matthew L. L.,et al. Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands[J],2023,16(1):11.
APA	Noyce, Genevieve L. L.,Smith, Alexander J. J.,Kirwan, Matthew L. L.,Rich, Roy L. L.,&Megonigal, J. Patrick.(2023).Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands.NATURE GEOSCIENCE,16(1),11.
MLA	Noyce, Genevieve L. L.,et al."Oxygen priming induced by elevated CO2 reduces carbon accumulation and methane emissions in coastal wetlands".NATURE GEOSCIENCE 16.1(2023):11.