Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries

We developed an Ecopath model for the Estuary of Sirinhaém 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 findi...

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Principais autores: Lira, Alex, Angelini, Ronaldo, Loc'h, François Le, Ménard, Frédéric, Lacerda, Carlos, Frédou, Thierry, Frédou, Flávia Lucena
Formato: article
Idioma:English
Publicado em: Elsevier
Assuntos:
Tropical estuary
Ecopath
Food web
Global comparison of ecological indicators
Endereço do item:https://repositorio.ufrn.br/handle/123456789/30595
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spelling ri-123456789-305952020-11-22T07:54:09Z Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries Lira, Alex Angelini, Ronaldo Loc'h, François Le Ménard, Frédéric Lacerda, Carlos Frédou, Thierry Frédou, Flávia Lucena Tropical estuary Ecopath Food web Global comparison of ecological indicators We developed an Ecopath model for the Estuary of Sirinhaém 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 2020-11-17T19:24:23Z 2020-11-17T19:24:23Z 2018-06 article LIRA, A.; ANGELINI, R.; LE LOCH, F. ; MENARD, F.; LACERDA, C.H.; FREDOU, T.; FREDOU, F.L. . Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries. Journal of Marine Systems, v. 182, p. 31-45, 2018. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0924796317303482. Acesso em: 10 nov. 2020. https://doi.org/10.1016/j.jmarsys.2018.02.007 0924-7963 https://repositorio.ufrn.br/handle/123456789/30595 10.1016/j.jmarsys.2018.02.007 en Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Elsevier
institution Repositório Institucional
collection RI - UFRN
language English
topic Tropical estuary
Ecopath
Food web
Global comparison of ecological indicators
spellingShingle Tropical estuary
Ecopath
Food web
Global comparison of ecological indicators
Lira, Alex
Angelini, Ronaldo
Loc'h, François Le
Ménard, Frédéric
Lacerda, Carlos
Frédou, Thierry
Frédou, Flávia Lucena
Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
description We developed an Ecopath model for the Estuary of Sirinhaém 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
format article
author Lira, Alex
Angelini, Ronaldo
Loc'h, François Le
Ménard, Frédéric
Lacerda, Carlos
Frédou, Thierry
Frédou, Flávia Lucena
author_facet Lira, Alex
Angelini, Ronaldo
Loc'h, François Le
Ménard, Frédéric
Lacerda, Carlos
Frédou, Thierry
Frédou, Flávia Lucena
author_sort Lira, Alex
title Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
title_short Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
title_full Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
title_fullStr Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
title_full_unstemmed Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
title_sort trophic flow structure of a neotropical estuary in northeastern brazil and the comparison of ecosystem model indicators of estuaries
publisher Elsevier
publishDate 2020
url https://repositorio.ufrn.br/handle/123456789/30595
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