气候变化领域集成服务门户(CCPortal): Saltmarsh blue carbon accumulation rates and their relationship with sea-level rise on a multi-decadal timescale in northern England

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DOI	10.1016/j.ecss.2024.108665
	Saltmarsh blue carbon accumulation rates and their relationship with sea-level rise on a multi-decadal timescale in northern England
	Gore, Catrina; Gehrels, W. Roland; Smeaton, Craig; Andrews, Luke; Mcmahon, Lucy; Hibbert, Fiona; Austin, William E. N.; Nolte, Stefanie; Garrett, Ed
发表日期	2024
ISSN	0272-7714
EISSN	1096-0015
起始页码	299
卷号	299
英文摘要	Saltmarshes are widely thought to sequester carbon at rates significantly exceeding those found in terrestrial environments. This ability arises from the in-situ production of plant biomass and the effective trapping and storage of both autochthonous and allochthonous organic carbon. The role saltmarshes play in climate change mitigation, through accumulating 'blue' carbon, depends on both the rate at which carbon accumulates within sediments and the rapidity with which carbon is remineralised. It has been hypothesised that carbon accumulation rates, in turn, depend on the local rate of relative sea-level rise, with faster sea-level rise providing more accommodation space for carbon storage. This relationship has been investigated over long (millennial) and short (decadal) timescales but without accounting for the impact of higher quantities of labile carbon in more recently deposited sediment. This study addresses these three key aspects in a saltmarsh sediment study from Lindisfarne National Nature Reserve (NNR), northern England, where there is a comparatively pristine marsh. We quantify rates of carbon accumulation by combining a Bayesian age-depth model based on 210Pb and 137Cs activities with centimetre-resolution organic carbon density measurements. We also use thermogravimetric analyses to determine the relative proportions of labile and recalcitrant organic matter and calculate the net recalcitrant organic matter accumulation rate. Results indicate that during the 20th century more carbon accumulated at the Lindisfarne NNR saltmarsh during decades with relatively high rates of sea-level rise. The post-depositional loss of labile carbon down the core results in a weaker though still significant relationship between recalcitrant organic matter accumulation and sea-level change. Thus, that increasing saltmarsh carbon accumulation is driven by higher rates of sea-level rise is demonstrated over recent multi-decadal timescales.
英文关键词	Labile; Recalcitrant; Thermogravimetric analysis; Chronology; 210 Pb sediment dating; 137 Cs sediment dating
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:001184295300001
来源期刊	ESTUARINE COASTAL AND SHELF SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302965
作者单位	University of East Anglia; University of York - UK; University of St Andrews; Adam Mickiewicz University; Manchester Metropolitan University; UHI Millennium Institute; Centre for Environment Fisheries & Aquaculture Science
推荐引用方式 GB/T 7714	Gore, Catrina,Gehrels, W. Roland,Smeaton, Craig,et al. Saltmarsh blue carbon accumulation rates and their relationship with sea-level rise on a multi-decadal timescale in northern England[J],2024,299.
APA	Gore, Catrina.,Gehrels, W. Roland.,Smeaton, Craig.,Andrews, Luke.,Mcmahon, Lucy.,...&Garrett, Ed.(2024).Saltmarsh blue carbon accumulation rates and their relationship with sea-level rise on a multi-decadal timescale in northern England.ESTUARINE COASTAL AND SHELF SCIENCE,299.
MLA	Gore, Catrina,et al."Saltmarsh blue carbon accumulation rates and their relationship with sea-level rise on a multi-decadal timescale in northern England".ESTUARINE COASTAL AND SHELF SCIENCE 299(2024).