气候变化领域集成服务门户(CCPortal): Implications of dietary carbon incorporation in fish carbonates for the global carbon cycle

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DOI	10.1016/j.scitotenv.2024.169895
	Implications of dietary carbon incorporation in fish carbonates for the global carbon cycle
	Oehlert, Amanda M.; Garza, Jazmin; Nixon, Sandy; Frank, Leeann; Folkerts, Erik J.; Stieglitz, John D.; Lu, Chaojin; Heuer, Rachael M.; Benetti, Daniel D.; del Campo, Javier; Gomez, Fabian A.; Grosell, Martin
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	916
卷号	916
英文摘要	Marine bony fish are important participants in Earth's carbon cycle through their contributions to the biological pump and the marine inorganic carbon cycle. However, uncertainties in the composition and magnitude of fish contributions preclude their integration into fully coupled carbon-climate models. Here, we consider recent upwards revisions to global fish biomass estimates (2.7-9.5x) and provide new stable carbon isotope measurements that show marine fish are prodigious producers of carbonate with unique composition. Assuming the median increase (4.17x) in fish biomass estimates is linearly reflected in fish carbonate (ichthyocarbonate) production rate, marine fish are estimated to produce between 1.43 and 3.99 Pg CaCO3 yr(-1), but potentially as much as 9.03 Pg CaCO3 yr(-1). Thus, marine fish carbonate production is equivalent to or potentially higher than contributions by coccolithophores or pelagic foraminifera. New stable carbon isotope analyses indicate that a significant proportion of ichthyocarbonate is derived from dietary carbon, rather than seawater dissolved inorganic carbon. Using a statistical mixing model to derive source contributions, we estimate ichthyocarbonate contains up to 81 % dietary carbon, with average compositions of 28-56 %, standing in contrast to contents <10 % in other biogenic carbonate minerals. Results also indicate ichthyocarbonate contains 5.5-40.4 % total organic carbon. When scaled to the median revised global production of ichthyocarbonate, an additional 0.08 to 1.61 Pg C yr(-1) can potentially be added to estimates of fish contributions to the biological pump, significantly increasing marine fish contributions to total surface carbon export. Our integration of geochemical and physiological analyses identifies an overlooked link between carbonate production and the biological pump. Since ichthyocarbonate production is anticipated to increase with climate change scenarios, due to ocean warming and acidification, these results emphasize the importance of quantitative understanding of the multifaceted role of marine fish in the global carbon cycle.
英文关键词	Global carbon cycle; Marine fish; Osmoregulation; Biological pump; Carbonate pump; Stable carbon isotope ratios
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001196523700001
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/304160
作者单位	University of Miami; University of Miami; Pompeu Fabra University; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC-UPF - Institut de Biologia Evolutiva (IBE); Mississippi State University; National Oceanic Atmospheric Admin (NOAA) - USA; Atlantic Oceanographic & Meteorological Laboratory (AOML)
推荐引用方式 GB/T 7714	Oehlert, Amanda M.,Garza, Jazmin,Nixon, Sandy,et al. Implications of dietary carbon incorporation in fish carbonates for the global carbon cycle[J],2024,916.
APA	Oehlert, Amanda M..,Garza, Jazmin.,Nixon, Sandy.,Frank, Leeann.,Folkerts, Erik J..,...&Grosell, Martin.(2024).Implications of dietary carbon incorporation in fish carbonates for the global carbon cycle.SCIENCE OF THE TOTAL ENVIRONMENT,916.
MLA	Oehlert, Amanda M.,et al."Implications of dietary carbon incorporation in fish carbonates for the global carbon cycle".SCIENCE OF THE TOTAL ENVIRONMENT 916(2024).