par Phuc-Hong Hoang, Trang;Guéret, Samuel;Bogaerts, Philippe
Référence Estuarine, coastal and shelf science, 330, page (109676)
Publication Publié, 2026-03
Article révisé par les pairs
Résumé : A model of the Vietnamese marine ecosystem is proposed to analyze the ecological development level in the decades 2000s and 2010s, the related causes and, especially, the fisheries impact. The ecosystem model consists of Linear Inverse Models (LIMs) that allow reconstructing carbon flows across five different trophic levels, computing four functional attributes, and estimating the fate of organic matter as well as the total system throughput of the ecosystem. The LIMs were solved to determine, on the one hand, the range of admissible solutions of each flux and, on the other hand, a Monte Carlo sampling of the polytope of flux solutions. From that sampling, the investigated functional attributes were consumption, egestion (flow to detritus), respiration and export. Based on the comparison of the total system throughput, fate of organic matter, and functional indices over the temporal periods, five conclusions are highlighted: (1) the flow of ecosystem energy in the 2010s period has increased by 32 % with respect to the previous decade; (2) catches of tunas, small pelagic fishes and cephalopods in the 2010s have significantly increased due to the La Niña phenomena, while other fisheries declined due to an increase of ocean temperature; (3) sea turtles in Vietnam are on the edge of extinction caused by tuna catches regardless of the recent raising awareness programs on protection and conservation; (4) the population of marine mammals on the coast of Vietnam up to the 2010s has decreased due to climate change, habitat destruction, overfishing, pollution and bycatch; (5) a contrasting sensitivity analysis between the 2000s and 2010s revealed reduced ecological resilience, calling for priority protection of vulnerable trophic groups.

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