气候变化领域集成服务门户(CCPortal): Changing carbon-to-nitrogen ratios of organic-matter export under ocean acidification

CCPortal

DOI	10.1038/s41558-020-00915-5
	Changing carbon-to-nitrogen ratios of organic-matter export under ocean acidification
	Taucher J.; Boxhammer T.; Bach L.T.; Paul A.J.; Schartau M.; Stange P.; Riebesell U.
发表日期	2020
ISSN	1758-678X
英文摘要	Ocean acidification (OA) will affect marine biotas from the organism to the ecosystem level. Yet, the consequences for the biological carbon pump and thereby the oceanic sink for atmospheric CO2 are still unclear. Here we show that OA considerably alters the C/N ratio of organic-matter export (C/Nexport), a key factor determining efficiency of the biological pump. By synthesizing sediment-trap data from in situ mesocosm studies in different marine biomes, we find distinct but highly variable impacts of OA on C/Nexport, reaching up to a 20% increase/decrease under partial pressure of CO2 (pCO2) conditions projected for 2100. These changes are driven by pCO2 effects on a variety of plankton taxa and corresponding shifts in food-web structure. Notably, our findings suggest a pivotal role of heterotrophic processes in controlling the response of C/Nexport to OA, thus contradicting the paradigm of primary producers as the principal driver of biogeochemical responses to ocean change. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/142234
作者单位	GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Taucher J.,Boxhammer T.,Bach L.T.,et al. Changing carbon-to-nitrogen ratios of organic-matter export under ocean acidification[J],2020.
APA	Taucher J..,Boxhammer T..,Bach L.T..,Paul A.J..,Schartau M..,...&Riebesell U..(2020).Changing carbon-to-nitrogen ratios of organic-matter export under ocean acidification.Nature Climate Change.
MLA	Taucher J.,et al."Changing carbon-to-nitrogen ratios of organic-matter export under ocean acidification".Nature Climate Change (2020).