气候变化领域集成服务门户(CCPortal): Important contribution of macroalgae to oceanic carbon sequestration

CCPortal

DOI	10.1038/s41561-019-0421-8
	Important contribution of macroalgae to oceanic carbon sequestration
	Ortega A.; Geraldi N.R.; Alam I.; Kamau A.A.; Acinas S.G.; Logares R.; Gasol J.M.; Massana R.; Krause-Jensen D.; Duarte C.M.
发表日期	2019
ISSN	17520894
卷号	12 期号:9
英文摘要	The role of macroalgae in Blue Carbon assessments has been controversial, partially due to uncertainties about the fate of exported macroalgae. Available evidence suggests that macroalgae are exported to reach the open ocean and the deep sea. Nevertheless, this evidence lacks systematic assessment. Here, we provide robust evidence of macroalgal export beyond coastal habitats. We used metagenomes and metabarcodes from the global expeditions Tara Oceans and Malaspina 2010 Circumnavigation. We discovered macroalgae worldwide at up to 5,000 km from coastal areas. We found 24 orders, most of which belong to the phylum Rhodophyta. The diversity of macroalgae was similar across oceanic regions, although the assemblage composition differed. The South Atlantic Ocean presented the highest macroalgal diversity, whereas the Red Sea was the least diverse region. The abundance of macroalgae sequences attenuated exponentially with depth at a rate of 37.3% km−1, and only 24% of macroalgae available at the surface were expected to reach the seafloor at a depth of 4,000 m. Our findings indicate that macroalgae are exported across the open and the deep ocean, suggesting that macroalgae may be an important source of allochthonous carbon, and their contribution should be considered in Blue Carbon assessments. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	abundance estimation; carbon sequestration; coastal structure; deep sea; genome; macroalga; open ocean; red alga; seafloor; uncertainty analysis; Atlantic Ocean; Atlantic Ocean (South); Indian Ocean; oceanic regions; Red Sea [Indian Ocean]; Rhodophyta
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/124614
作者单位	Red Sea Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; Institut de Ciències del Mar, CSIC, Barcelona, Spain; Centre for Marine Ecosystem Research, Edith Cowan UniversityWA, Australia; Arctic Research Centre, Department of Bioscience, Aarhus University, Aarhus, Denmark; Department of Bioscience, Aarhus University, Silkeborg, Denmark
推荐引用方式 GB/T 7714	Ortega A.,Geraldi N.R.,Alam I.,et al. Important contribution of macroalgae to oceanic carbon sequestration[J],2019,12(9).
APA	Ortega A..,Geraldi N.R..,Alam I..,Kamau A.A..,Acinas S.G..,...&Duarte C.M..(2019).Important contribution of macroalgae to oceanic carbon sequestration.Nature Geoscience,12(9).
MLA	Ortega A.,et al."Important contribution of macroalgae to oceanic carbon sequestration".Nature Geoscience 12.9(2019).