TROPECOS News

TROPECOS scientists involved in WP3 reveal that the composition of dissolved organic matter (DOM) in mangrove soils is strongly influenced by mangrove species and their biological traits, including mycorrhizal associations.

This is crucial because DOM plays a key role in carbon cycling and nutrient export from mangroves. These findings highlight that understanding species-specific DOM dynamics is essential to better assess carbon fluxes and the functioning of atoll mangrove ecosystems.

TROPECOS Scientists involved in WP2  show that the nature of mangrove soil carbon varies significantly depending on the coastal landscape where mangroves grow. These findings challenge the "one-size-fits-all" approach to mangrove conservation and restoration for blue C, with major implications for climate policy and mangrove restoration projects.

The second TROPECOS field work in mangroves of Rio de Janeiro (Mamangua and Itacoatiara) 24 May 2025 – 7 June 2026, involved 14 TROPECOS research scientists and students from BOREA, LPG, UFF and UFPA. We measured gas fluxes in mangrove soils and waters, dissolved carbon concentrations and water current in tidal creeks, and high resolution dissolved redox species in sediments using 2D gels. 

The second TROPECOS field work in Mékong Delta, 19-26 March, 2025, involved 3 research scientists, one post doc and one master student from IGE, CARE/HCMUT and CARRTEL. The four main branches of Mékong Delta were sampled along about 500 km in order to cover the entire salinity gradient from freshwaters to seawaters along the coast. This second campaign was realised in dry season and will allow to compare different land use in the different branches (paddy rice, aquaculture, urban area…)

The second TROPECOS field work in mangroves of Pará (Marapanim and Salinas) 6 May 2025 - 28 May 2025, involved 11 TROPECOS research scientists and students from BOREA, LPG, UFF and UFPA. We measured gas fluxes in mangrove soils and waters, dissolved carbon concentrations and water current in tidal creeks, and high resolution dissolved redox species in sediments using 2D gels. 

Five TROPECOS researchers from IGE and CARE/HCMUT have joined the Antea, a scientific vessel from the French ocean fleet which sailed for 1 month along the Vietnamese South coast (10 June – 10 July 2024). During the field trip in wet season, intensive sampling of water for dissolved and particulate carbone as well as CO2 and CH4 concentrations was realised within the Saigon Dong Nai estuary, in two branches of Mékong Delta and along the coast. For more information: https://plumevietnam.com/