From Australian Oceans Data Network
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Tracing blue carbon flows across diverse seascapes

Created 18/11/2025

Updated 18/11/2025

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Abstract: Plants occupying coastal ecosystems draw in carbon dioxide (CO2) from the air and water around them during photosynthesis. A fraction of this CO2 becomes fixed into plant biomass and can eventually contribute to the blue carbon pool—organic carbon (Corg) sequestered in slow-turnover sinks. An important step in protecting and enhancing this natural carbon sequestration pathway is determining the relative contributions of different coastal plants to this blue carbon pool in durable sinks. We compiled a global dataset of coastal soil carbon measurements and used a Bayesian hierarchical meta-regression model to explore the relative contribution of local (autochthonous) versus external (allochthonous) sources of Corg in the soils beneath tidal saltmarsh, mangrove, and seagrass wetlands. We found most soil Corg in coastal wetlands came from allochthonous sources, rather than the habitat-forming plants. Managing climate-resilient blue carbon seascapes, therefore, requires an awareness of this portfolio of contributors to soil carbon sequestration. However, study design aspects such as soil sampling depth, levels of sample replication, and the modelling approach used to trace Corg can have pronounced effects on the estimated contributions of different carbon sources. We outline a roadmap for improving how we track the various drivers of soil carbon sequestration in diverse mosaics of coastal vegetation.

Files and APIs

Additional Info

Field Value
Title Tracing blue carbon flows across diverse seascapes
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/b6e25e76-9f10-4e98-8ebd-5b528b2fd3e8
Contact Point
Australian Ocean Data Network
reception@aims.gov.au
Reference Period 24/09/2025
Geospatial Coverage
Map data © OpenStreetMap contributors
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      ],
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  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Tracing blue carbon flows across diverse seascapes". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/tracing-blue-carbon-flows-across-diverse-seascapes