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Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)

Vermelha Lagoon is a hypersaline shallow transitional ecosystem in the state of Rio de Janeiro (Brazil). This lagoon is located in the protected area of Massambaba, between the cities of Araruama and Saquarema (Brazil), and displays two quite uncommon particularities: it exhibits carbonate sedimenta...

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Autores principales: Laut, Lazaro, Martins, Maria Virginia Alves, Frontalini, Fabrizio, Ballalai, João M., Belart, Pierre, Habib, Renan, Fontana, Luiz F., Clemente, Iara M. M. M., Lorini, Maria Lucia, Mendonça Filho, João G., Laut, Vanessa M., Figueiredo, Marcos de Souza Lima
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5608279/
https://www.ncbi.nlm.nih.gov/pubmed/28934270
http://dx.doi.org/10.1371/journal.pone.0184819
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author Laut, Lazaro
Martins, Maria Virginia Alves
Frontalini, Fabrizio
Ballalai, João M.
Belart, Pierre
Habib, Renan
Fontana, Luiz F.
Clemente, Iara M. M. M.
Lorini, Maria Lucia
Mendonça Filho, João G.
Laut, Vanessa M.
Figueiredo, Marcos de Souza Lima
author_facet Laut, Lazaro
Martins, Maria Virginia Alves
Frontalini, Fabrizio
Ballalai, João M.
Belart, Pierre
Habib, Renan
Fontana, Luiz F.
Clemente, Iara M. M. M.
Lorini, Maria Lucia
Mendonça Filho, João G.
Laut, Vanessa M.
Figueiredo, Marcos de Souza Lima
author_sort Laut, Lazaro
collection PubMed
description Vermelha Lagoon is a hypersaline shallow transitional ecosystem in the state of Rio de Janeiro (Brazil). This lagoon is located in the protected area of Massambaba, between the cities of Araruama and Saquarema (Brazil), and displays two quite uncommon particularities: it exhibits carbonate sedimentation and displays the development of Holocene stromatolites. Due to both particularities, the salt industry and property speculation have been, increasingly, generating anthropic pressures on this ecosystem. This study aims to apply a multiproxy approach to evaluate the trophic state of Vermelha Lagoon based on physicochemical parameters and geochemical data for the quantification and qualification of organic matter (OM), namely total organic carbon (TOC), total sulfur (TS), total phosphorus (TP) and biopolymeric carbon (BPC), including carbohydrates (CHO), lipids (LIP) and proteins (PTN). The CHO/TOC ratio values suggest that OM supplied to the sediment is of autochthonous origin and results, essentially, from microbial activity. The cluster analyses allowed the identification of four regions in Vermelha Lagoon. The Region I included stations located in shallow areas of the eastern sector of Vermelha lagoon affected by the impact of the artificial channel of connection with Araruama Lagoon. The Region II, under the influence of salt pans, is characterized by the highest values of BPC, namely CHO promoted by microbiological activity. The Region III include stations spread through the lagoon with high values of dissolved oxygen and lower values of TP. Stromatolites and microbial mattes growth was observed in some stations of this sector. Region IV, where the highest values of TOC and TS were found, represents depocenters of organic matter, located in general in depressed areas. Results of this work evidences that the Vermelha Lagoon is an eutrophic but alkaline and well oxygenated environment (at both water column and surface sediment) where the autotrophic activity is greater than heterotrophic one. These particular conditions make this a special and rare ecosystem.
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spelling pubmed-56082792017-10-09 Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil) Laut, Lazaro Martins, Maria Virginia Alves Frontalini, Fabrizio Ballalai, João M. Belart, Pierre Habib, Renan Fontana, Luiz F. Clemente, Iara M. M. M. Lorini, Maria Lucia Mendonça Filho, João G. Laut, Vanessa M. Figueiredo, Marcos de Souza Lima PLoS One Research Article Vermelha Lagoon is a hypersaline shallow transitional ecosystem in the state of Rio de Janeiro (Brazil). This lagoon is located in the protected area of Massambaba, between the cities of Araruama and Saquarema (Brazil), and displays two quite uncommon particularities: it exhibits carbonate sedimentation and displays the development of Holocene stromatolites. Due to both particularities, the salt industry and property speculation have been, increasingly, generating anthropic pressures on this ecosystem. This study aims to apply a multiproxy approach to evaluate the trophic state of Vermelha Lagoon based on physicochemical parameters and geochemical data for the quantification and qualification of organic matter (OM), namely total organic carbon (TOC), total sulfur (TS), total phosphorus (TP) and biopolymeric carbon (BPC), including carbohydrates (CHO), lipids (LIP) and proteins (PTN). The CHO/TOC ratio values suggest that OM supplied to the sediment is of autochthonous origin and results, essentially, from microbial activity. The cluster analyses allowed the identification of four regions in Vermelha Lagoon. The Region I included stations located in shallow areas of the eastern sector of Vermelha lagoon affected by the impact of the artificial channel of connection with Araruama Lagoon. The Region II, under the influence of salt pans, is characterized by the highest values of BPC, namely CHO promoted by microbiological activity. The Region III include stations spread through the lagoon with high values of dissolved oxygen and lower values of TP. Stromatolites and microbial mattes growth was observed in some stations of this sector. Region IV, where the highest values of TOC and TS were found, represents depocenters of organic matter, located in general in depressed areas. Results of this work evidences that the Vermelha Lagoon is an eutrophic but alkaline and well oxygenated environment (at both water column and surface sediment) where the autotrophic activity is greater than heterotrophic one. These particular conditions make this a special and rare ecosystem. Public Library of Science 2017-09-21 /pmc/articles/PMC5608279/ /pubmed/28934270 http://dx.doi.org/10.1371/journal.pone.0184819 Text en © 2017 Laut et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Laut, Lazaro
Martins, Maria Virginia Alves
Frontalini, Fabrizio
Ballalai, João M.
Belart, Pierre
Habib, Renan
Fontana, Luiz F.
Clemente, Iara M. M. M.
Lorini, Maria Lucia
Mendonça Filho, João G.
Laut, Vanessa M.
Figueiredo, Marcos de Souza Lima
Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title_full Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title_fullStr Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title_full_unstemmed Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title_short Assessment of the trophic state of a hypersaline-carbonatic environment: Vermelha Lagoon (Brazil)
title_sort assessment of the trophic state of a hypersaline-carbonatic environment: vermelha lagoon (brazil)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5608279/
https://www.ncbi.nlm.nih.gov/pubmed/28934270
http://dx.doi.org/10.1371/journal.pone.0184819
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