TROPECOS News | TROPECOS

This dataset shows the extent of mangroves along the entire Guyanese coastline in 2025. This can be visualised and estimated based on the area, expressed in hectares, of several hundred mangrove polygons (MangArea field). Coastal mangroves can be distinguished from estuarine mangroves using the CoastType field. The delineated areas either correspond to patches of forest with varying degrees of canopy closure, or to the outlines of individual tree canopies.

Read more about New dataset: The extent of mangroves in French Guiana in 2025 by Proisy et al.

A quality-controlled, 10-year (2015–2025) biogeochemical dataset was published for the Saigon-Dong Nai River-estuary continuum in Ho Chi Minh City, Vietnam, addressing a critical observational gap in tropical Southeast Asia. The observing program couples a biweekly time series at four fixed stations with seasonal longitudinal transects across 27 sites, encompassing over 19,800 observations of physical parameters, nutrients, organic carbon, and chlorophyll-a.

Read more about New TROPECOS data paper in JGR-Biogeosciences: A Decade of Biogeochemical Monitoring in the Tropical Urban Saigon-Dong Nai River-Estuary Continuum, Vietnam by Le et al.

Mangrove sediments are widely recognized as an important component of long-term carbon storage in coastal ecosystems. However, the structure, evolution, and thematic organization of the scientific literature addressing mangrove sediment carbon have not yet been clearly characterized at the global scale. This study addresses this gap by providing a scientometric analysis of the literature on mangrove sediments as carbon sinks.

Read more about New TROPECOS paper in Environmental Science and Pollution Research: "Mangrove sediments as carbon sinks: a global analysis of research patterns, trends and future directions" by Cavalcante et al.

The proximate controls on phytoplankton blooms and carbon dynamics were investigated in the eutrophic, wastewater-impacted Saigon River Estuary (Ho Chi Minh City, Vietnam) using a transient 1D reactive-transport model (C-GEM) evaluated against 24 months of monitoring data.

Read more about New TROPECOS paper in Ecological Modelling : Evidence of hydrodynamic control of phytoplankton seasonality in a tropical urban estuary by Nguyen et al.

7th Mangrove Macrobenthos and Management Conference (MMM7)

IMPROVING THE FINE-SCALE CHARACTERIZATION OF THE STRUCTURAL DIVERSITY OF MANGROVE FORESTS IN FRENCH GUIANA TO REFINE CARBON MAPPING

By Quentin Marsal (1,3), Christophe Proisy (1,2), Thibault Catry (3,4), Elodie Blanchard (3), Maxime Dutour (1,2) and Jean-Luc Maeght (1)

1: IRD UMR AMAP, Montpellier, France

2: IRD UMR AMAP, Cayenne, French Guiana, France

3: IRD UMR ESPACE-DEV, Montpellier, France

4: KHEOBS Laboratory, Phnom Penh, Cambodia

Read more about Presentation of Quentin Marsal at the 7th Mangrove Macrobenthos and Management Conference (MMM7)

DOM quantity and quality were investigated in semi-arid mangroves with no external organic matter input, developing along an intertidal gradient: a salt-flat, an Avicennia marina stand, and a Rhizophora stylosa stand. Soil and porewater samples were collected during both wet and dry seasons, and analysed for physicochemical parameters, total and dissolved organic carbon (TOC, DOC), chromophoric and fluorescent dissolved organic matter (CDOM, FDOM), and mineralogical composition.

Read more about New TROPECOS paper in Biogeosciences : Seasonal dynamics of dissolved organic matter along an intertidal gradient in semi-arid mangrove soils (New Caledonia) by Mouras et al.