Importance of quantifying the full-depth carbon reservoir of Jamaica Bay salt Marshes, New York

Pace, G.; Peteet, D. M.; Dunton, Molly; Wang-Mondaca, Carol; Ismail, S. Y.; Supino, John; Nichols, J. E.

doi:10.1016/j.cacint.2021.100073

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…These results highlight that, to accurately account for OC within saltmarshes, it is crucial to understand the soil profile (Figure 3) and how this relates to different environmental settings (Mueller et al, 2019;Ladd et al, 2022;Miller et al, 2023). Arbitrarily accounting for saltmarsh OC down to a depth of 1 m to match terrestrial OC accounting approaches or the Intergovernmental Panel Climate Change reporting (Howard et al, 2014;Kennedy et al, 2013) may either underestimate (Pace et al, 2021) or, as in the case of GB saltmarshes, significantly overestimate the OC held within saltmarsh soils.…”

Section: Upscaled National Saltmarsh Oc Stocksmentioning

confidence: 99%

“…Both the United States (17,234 km 2 ) and Australian (13,765 km 2 ) saltmarsh habitats occupy areas significantly larger than the GB systems (McOwen et al, 2017), which results in much higher OC stocks (Table 4). Additionally, both these estimates are to a depth of 1 m. Unlike GB marshes (Figure 3), the saltmarsh soils of the United States and Australia frequently extend to or beyond 1 m (Dittman et al, 2016;Pace et al, 2021). When area normalized OC values are compared, the GB marshes store on average 11.55 ± 1.56 kg C m -2 which is comparable to Australian systems that store between 9.13 and 18.83 kg C m -2 (Macreadie et al, 2017).…”

Section: Comparison To Other National Saltmarsh Oc Stocksmentioning

confidence: 99%

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Organic carbon stocks of Great British saltmarshes

Smeaton,

Ladd,

Miller

et al. 2023

Front. Mar. Sci.

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Coastal wetlands, such as saltmarshes, are globally widespread and highly effective at capturing and storing ‘blue carbon’ and have the potential to regulate climate over varying timescales. Yet only Australia and the United States of America have national inventories of organic carbon held within saltmarsh habitats, hindering the development of policies and management strategies to protect and preserve these organic carbon stores. Here we couple a new observational dataset with 4,797 samples from 26 saltmarshes across Great Britain to spatially model organic carbon stored in the soil and the above and belowground biomass of Great British saltmarshes. Using average values derived from the 26 marshes, we deliver first-order estimates of organic carbon stocks across Great Britain’s 448 saltmarshes (451.66 km2). The saltmarshes of Great Britain contain 5.20 ± 0.65 Mt of organic carbon, 93% of which is in the soil. On average, the saltmarshes store 11.55 ± 1.56 kg C m-2 with values ranging between 2.24 kg C m-2 and 40.51 kg C m-2 depending on interlinked factors such as geomorphology, organic carbon source, sediment type (mud vs sand), sediment supply, and relative sea level history. These findings affirm that saltmarshes represent the largest intertidal blue carbon store in Great Britain, yet remain an unaccounted for component of the United Kingdom’s natural carbon stores.

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