Salt Marshes

Alongi, Daniel M.

doi:10.1007/978-3-319-91698-9_2

Cited by 5 publications

(1 citation statement)

References 65 publications

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“…With a mean ( ± SE) value of 86.3 ± 7.6 Mg C ha -1 (Table 1), the global sediment C stock of tidal flats ranges from 1.4 to 514.2 Mg C ha -1 (Table S1). The mean C stock value of unvegetated tidal flats is between 2 to 4 times lower than that in vegetated ecosystems (293.9 Mg C ha -1 for mangroves, 317.2 Mg C ha -1 for salt marshes and 194.2 Mg C ha -1 for seagrass) (Fourqurean et al, 2012;Alongi, 2018;Ouyang and Lee, 2020) (Figure 2A and Table 1). As the data distribution did not conform to normality, the median value (67.9 Mg C ha -1 ) is used to avoid the effects of extreme outliners.…”

Section: Carbon Stocks and The Carbon Accumulation Rate Of Tidal Flatsmentioning

confidence: 97%

Tidal Flats as a Significant Carbon Reservoir in Global Coastal Ecosystems

Chen

Lee²

2022

Front. Mar. Sci.

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Tidal flats are widely distributed and provide a variety of ecosystem services. Nevertheless, the consequences of tidal flat loss and implications for services such as carbon (C) sequestration have not been assessed. In unvegetated tidal flat ecosystems, sediment is the most important carbon reservoir, similar to that of vegetated coastal wetlands (i.e., mangroves, salt marshes, and seagrass). We examined the C stocks and C accumulation rate (CAR) reported from 123 locations of tidal flat around the world and compared these results with data from mangroves, salt marshes, and seagrass meadows. The global average CAR of tidal flats is 129.8 g C m-2 yr-1, with the top-meter sediments containing on average 86.3 Mg C ha-1. Globally, tidal flat can bury 6.8 Tg C (24.9 Tg CO2) per year and can store 0.9 Pg C (3.3 Pg CO2) in the top meter sediment. Assuming the same rate of loss tidal flats as in the past three decades and that all disturbed sediment C is remineralized, 4.8 Tg C will be lost from tidal flat sediments every year, equivalent to an emission of 17.6 Tg CO2 to the water column and atmosphere.

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Section: Carbon Stocks and The Carbon Accumulation Rate Of Tidal Flatsmentioning

confidence: 97%

Tidal Flats as a Significant Carbon Reservoir in Global Coastal Ecosystems

Chen

Lee²

2022

Front. Mar. Sci.

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Managing the Blue Carbon Ecosystem: A Remote Sensing andGISApproach

Maurya

Das

Kumari

2021

Advances in Remote Sensing for Natural Resource Monitoring

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Soil Carbon Stocks Vary Across Geomorphic Settings in Australian Temperate Tidal Marsh Ecosystems

et al. 2020

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Tidal marshes rank among the ecosystems with the highest capacity to sequester and store organic carbon (C org) on earth. To inform conservation of coastal vegetated ecosystems for climate change mitigation, this study investigated the factors driving variability in carbon storage. We estimated soil C org stocks in tidal marshes across temperate Western Australia and assessed differences among geomorphic settings (marine and fluvial deltas, and mid-estuary) and vegetation type (Sarcocornia quinqueflora and Juncus kraussii) linked to soil biogeochemistry. Soil C org stocks within fluvial and mid-estuary settings were significantly higher (209 ± 14 and 211 ± 20 Mg C org ha-1 , respectively; 1-m-thick soils) than in marine counterparts (156 ± 12 Mg C org ha-1), which can be partially explained by higher preservation of soil C org in fluvial and mid-estuary settings rich in fine-grained (< 0.063 mm) sediments (49 ± 3% and 47 ± 4%, respectively) compared to marine settings (23 ± 4%). Soil C org stocks were not significantly different between S. quinqueflora and J. kraussii marshes (185 ± 13 and 202 ± 13 Mg C org ha-1 , respectively). The higher contribution of tidal marsh plus supratidal vegetation in fluvial (80%) and intermediate (76%) compared to marine (57%) settings further explains differences in soil C org stocks. The estimated soil C org stocks in temperate Western Australia's tidal marshes (57 Tg C org within 3000 km 2 extent) correspond to about 2% of worldwide tidal marsh soil C org stocks. The results obtained identify global drivers of soil C org storage in tidal marshes and can be used to target hot spots for climate change mitigation based on tidal marsh conservation.

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Salt Marshes

Cited by 5 publications

References 65 publications

Tidal Flats as a Significant Carbon Reservoir in Global Coastal Ecosystems

Tidal Flats as a Significant Carbon Reservoir in Global Coastal Ecosystems

Managing the Blue Carbon Ecosystem: A Remote Sensing andGISApproach

Soil Carbon Stocks Vary Across Geomorphic Settings in Australian Temperate Tidal Marsh Ecosystems

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