Isotope geochemistry

The third TROPECOS field work in mangroves of Marapanim Pará (19 Sep. 2025 – 3 Oct. 2025, involved 7 research scientists and students from BOREA, MPEG, UFF and UFPA. We measured gas fluxes in mangrove soils and waters, dissolved carbon concentrations and tidal exchanges, isotopic composition of dissolved inorganic carbon and methane, and litter fall. A world record of tidal variation of pCO2 in a mangrove tidal creek was obtained during equinox spring tides, with values lower than 900 ppmv at high tide and higher than 9 000 ppmv at low tide.  

This TROPECOS fieldwork in the mangroves of Ouvéa involved a team of six scientists, including a researcher, two PhD students, a post-doc, a researcher technician and an intern from University of New Caledonia.

The week-long mission was made possible through the agreement of the landowners from the Téouta tribe and the hospitality of the women’s association in the Téouta tribe (FAI DOHU association). 

The first TROPECOS field work in mangroves of Pará (Marapanim and Salinas) 12 November, 2024 - 21 November, 2024, involved 13 TROPECOS research scientists and students from BOREA, LPG, MPEG, UFF and UFPA 

The first TROPECOS field work in mangroves of Rio de Janeiro (Mamangua and Sepetiba), 30 October, 2024 - 9 November, 2024,  involved 15 research scientists and students from BOREA, LPG, iEES, UFF, UFPA and UERJ