Lira A. auteur aut IRD Angelini R. auteur aut IRD Le Loc'h François auteur aut IRD Ménard Frédéric auteur aut IRD Lacerda C. auteur aut IRD Fredou T. auteur aut IRD Fredou F. L. auteur aut IRD text journalArticle eng text/pdf born digital access We developed an Ecopath model for the Estuary of Sirinhaem River (SIR), a small-sized system surrounded by mangroves, subject to high impact, mainly by the sugar cane and other farming industries in order to describe the food web structure and trophic interactions. In addition, we compared our findings with those of 20 available Ecopath estuarine models for tropical, subtropical and temperate regions, aiming to synthesize the knowledge on trophic dynamics and provide a comprehensive analysis of the structures and functioning of estuaries. Our model consisted of 25 compartments and its indicators were within the expected range for estuarine areas around the world. The average trophic transfer efficiency for the entire system was 11.8%, similar to the theoretical value of 10%. The Keystone Index and MTI (Mixed Trophic Impact) analysis indicated that the snook (Centropomus undecimalis and Centropomus parallelus) and jack (Caranx latus and Caranx hippos) are considered as key resources in the system, revealing their high impact in the food web. Both groups have a high ecological and commercial relevance, despite the unregulated fisheries. As result of the comparison of ecosystem model indicators in estuaries, differences in the ecosystem structure from the low latitude zones (tropical estuaries) to the high latitude zones (temperate system) were noticed. The structure of temperate and sub-tropical estuaries is based on high flows of detritus and export, while tropical systems have high biomass, respiration and consumption rates. Higher values of System Omnivory Index (SOI) and Overhead (SO) were observed in the tropical and subtropical estuaries, denoting a more complex food chain. Globally, none of the estuarine models were classified as fully mature ecosystems, although the tropical ecosystems were considered more mature than the subtropical and temperate ecosystems. This study is an important contribution to the trophic modeling of estuaries, which may also help the knowledge of the role of key ecosystem processes in SIR. specialized Tropical estuary Ecopath Food web Global comparison of ecological indicators BRESIL ZONE TROPICALE 036 020 182 31-45 2018 0924-7963 https://www.documentation.ird.fr/hor/fdi:010072777 10.1016/j.jmarsys.2018.02.007 0924-7963 [F B010072777] https://www.documentation.ird.fr/hor/fdi:010072777 https://www.documentation.ird.fr/intranet/publi/2018/05/010072777.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-06-01 2023-07-11 fdi:010072777 fre