Fingerprinting macrophyte Blue Carbon by pyrolysis-GC-compound specific isotope analysis (Py-CSIA)

Kaal, Joeri; González‐Pérez, José Antonío; Emeterio, Layla M. San; Serrano, Óscar

doi:10.1016/j.scitotenv.2022.155598

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…The presence of IC following acidification would result in δ 13 C values higher than −9‰, owing to the δ 13 C values of CaCO 3 close to zero and the δ 13 C of seagrass and other potential OM sources > − 9‰ (Kennedy et al 2005, 2010). Acidification also resulted in δ 13 C fractionation, in particular in OM‐rich samples, which indicates the loss of more labile organic compounds (e.g., proteins) that are enriched in 13 C and the selective preservation of less soluble compounds such as lignin that are depleted in 13 C relative to bulk plant OM (Kaal et al 2022). This effect of acidification on δ 13 C values of bulk sedimentary OC has implications for using δ 13 C as a proxy for deciphering the provenance of sedimentary OC in Blue Carbon ecosystems (Kennedy et al 2010; Geraldi et al 2019) and requires further attention.…”

Section: Discussionmentioning

confidence: 99%

Flaws in the methodologies for organic carbon analysis in seagrass blue carbon soils

Serrano,

Mazarrasa,

Fourqurean

et al. 2023

Limnology & Ocean Methods

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The ability to accurately measure organic carbon (OC) in marine sediments or soils is overall taken for granted in scientific communities, yet this seemingly mundane task remains a methodological challenge when the soil matrix contains calcium carbonate (CaCO3), creating inaccuracies in Blue Carbon estimates. Here, we compared five common methods combining acidification, combustion, and wet oxidation pre‐treatments for determination of OC in sediments and soils containing CaCO3 based on the analyses of artificial soil mixtures made of different OC and CaCO3 contents, and multiple soils from Australian seagrass cores. The results obtained showed that methods involving acidification pre‐treatment entailed −17 ± 0.2% (mean ± SE) underestimation of OC content (ranging from −8% to −26%), whereas the combustion‐based method was accurate for samples with high CaCO3 content but entailed 32–47% overestimation in samples with low CaCO3 content. The Heanes method (wet oxidation method) showed <5% deviation from the known OC content, but this method is not suitable for soil samples containing reduced iron, sulfur and potentially manganese compounds. The differences observed among methods have significant impacts on local, regional, and global Blue Carbon storage calculations. We provide key methodological guidelines for the analysis of OC in soils with high and low CaCO3 contents, aiming at improving accuracy in current Blue Carbon science.

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Section: Discussionmentioning

confidence: 99%

Flaws in the methodologies for organic carbon analysis in seagrass blue carbon soils

Serrano,

Mazarrasa,

Fourqurean

et al. 2023

Limnology & Ocean Methods

Self Cite

View full text Add to dashboard Cite

show abstract

“…All weighed compound-specific values are summed and divided by 100 as to be compared to the bulk isotopic values. This has been proved to avoid the interference on 13 C mainly due to the multiple small peaks [59].…”

Section: Pyrolysis Compound-specific Isotopic Analysis (δ 13 C Py-csia)mentioning

confidence: 99%

Pyrolysis Carbon Compound-Specific Isotope Analysis (Py-Csia) of Eucalyptus Spp. Bark and the Extracted Lignin

Emeterio

Morillo²,

Reina³

et al. 2022

SSRN Journal

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Pyrolysis carbon compound-specific isotope analysis (Py-CSIA) of Eucalyptus spp. bark and the extracted lignin

Emeterio

Morillo

Reina

et al. 2023

Journal of Analytical and Applied Pyrolysis

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Fingerprinting macrophyte Blue Carbon by pyrolysis-GC-compound specific isotope analysis (Py-CSIA)

Cited by 4 publications

References 42 publications

Flaws in the methodologies for organic carbon analysis in seagrass blue carbon soils

Flaws in the methodologies for organic carbon analysis in seagrass blue carbon soils

Pyrolysis Carbon Compound-Specific Isotope Analysis (Py-Csia) of Eucalyptus Spp. Bark and the Extracted Lignin

Pyrolysis carbon compound-specific isotope analysis (Py-CSIA) of Eucalyptus spp. bark and the extracted lignin

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