Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia

Description

Coastal vegetated ecosystems are recognized for their role in cycling and storing carbon in the world’s oceans (i.e., blue carbon); however, high uncertainty in carbon sequestration rates is partly due to an absence of studies estimating carbon export to the deep sea. We modeled export from nearshore kelp forests and seagrass beds, showing variability by orders of magnitude across spatial scales (3 to hundreds of kilometers), kelp and seagrass species, seasons, and carbon forms, raising caution in using generalized export rates in blue carbon accounting. Our results also show rapid (20 to 30 days) and extensive export of neutrally buoyant dissolved organic carbon particles to the shelf break (up to 44% within 90 days), contrasting sinking particulate organic carbon particles that largely remained within 100-meter water depth in the nearshore. These results improve estimates of carbon sequestration by blue carbon ecosystems and reveal contrasting patterns of export relative to other regions of the globe. Cite this data as: Kira A. Krumhansl et al., Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia.Sci. Adv.11,eadw1952(2025).DOI: 10.1126/sciadv.adw1952

Resources

Name Format Description Link
Code/Software Unknown https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Code.zip
Data dictionary CSV https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Data_dictionary.csv
Finite-Volume Community Ocean Model (FVCOM) boundary Unknown https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Finite_Volume_Community_Ocean_Model_FVCOM_boundary.zip
Finite-Volume Community Ocean Model (FVCOM) boundary TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/FVCOM_boundary.txt
Simulation outputs from modelling experiments of Laminaria digitata dissolved organic carbon (DOC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Laminaria_digitata_DOC_%20simulation_outputs_code.zip
Simulation outputs from modeling experiments of Laminaria digitata particulate organic carbon (POC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Laminaria_digitata_POC_simulation_outputs_code.zip
Simulation outputs from modelling experiments of Saccharina latissima dissolved organic carbon (DOC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Saccharina_latissima_DOC_%20simulation_outputs_code.zip
Simulation outputs from modeling experiments of Saccharina latissima particulate organic carbon (POC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Saccharina_latissima_POC_simulation_outputs_code.zip
Simulation outputs from modelling experiments of seagrass dissolved organic carbon (DOC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Zostera_Marina_DOC_simulation_outputs_code.zip
Simulation outputs from modeling experiments of seagrass particulate organic carbon (POC) dispersal TXT https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/fc697863-12c6-4304-9ec7-2963e9a60cd5/attachments/Zostera_marina_POC_simulation_outputs_code.zip
Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia Ersi REST https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/blue_carbon_export_kelp_seagrass/MapServer
Pathways of blue carbon export from kelp and seagrass beds along the Atlantic coast of Nova Scotia Ersi REST https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/blue_carbon_export_kelp_seagrass/MapServer

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