Produção Nacional
Revisado por pares
Microbial Biofacies and the Influence of Metazoans in Holocene Deposits of the Lagoa Salgada, Rio De Janeiro State, Brazil
2018; Society for Sedimentary Geology; Volume: 88; Issue: 11 Linguagem: Inglês
10.2110/jsr.2018.64
ISSN1938-3681
AutoresFrésia Ricardi-Branco, Flávia Callefo, Rafael Amaral Cataldo, Nora Noffke, Luiz Carlos Ruiz Pessenda, Alexandre Campane Vidal, Fábio Cardinale Branco,
Tópico(s)Isotope Analysis in Ecology
ResumoResearch Article| November 27, 2018 Microbial Biofacies and the Influence of Metazoans in Holocene Deposits of the Lagoa Salgada, Rio De Janeiro State, Brazil Fresia Ricardi-Branco; Fresia Ricardi-Branco 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Search for other works by this author on: GSW Google Scholar Flavia Callefo; Flavia Callefo 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Search for other works by this author on: GSW Google Scholar Rafael A. Cataldo; Rafael A. Cataldo 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Search for other works by this author on: GSW Google Scholar Nora Noffke; Nora Noffke 2Department of Ocean, Earth and Atmospheric Sciences, Old Dominion University, Norfolk, Virginia 23529, U.S.A. Search for other works by this author on: GSW Google Scholar Luiz Carlos R. Pessenda; Luiz Carlos R. Pessenda 3Center for Nuclear Energy in Agriculture (CENA), Avenida Centenário 303, São Paulo University, 13416-000, Piracicaba, SP, Brazil Search for other works by this author on: GSW Google Scholar Alexandre C. Vidal; Alexandre C. Vidal 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Search for other works by this author on: GSW Google Scholar Fabio Cardinale Branco Fabio Cardinale Branco 4Environmentality, Michigan, 177, 04566-000, São Paulo, SP, Brazil Search for other works by this author on: GSW Google Scholar Author and Article Information Fresia Ricardi-Branco 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Flavia Callefo 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Rafael A. Cataldo 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Nora Noffke 2Department of Ocean, Earth and Atmospheric Sciences, Old Dominion University, Norfolk, Virginia 23529, U.S.A. Luiz Carlos R. Pessenda 3Center for Nuclear Energy in Agriculture (CENA), Avenida Centenário 303, São Paulo University, 13416-000, Piracicaba, SP, Brazil Alexandre C. Vidal 1Department of Geology and Natural Resources, Geosciences Institute, P.O. Box 6152, Campinas University, UNICAMP, 13083-970, Campinas, SP, Brazil Fabio Cardinale Branco 4Environmentality, Michigan, 177, 04566-000, São Paulo, SP, Brazil e-mail: fresia@ige.unicamp.br Publisher: SEPM Society for Sedimentary Geology First Online: 27 Nov 2018 Online Issn: 1938-3681 Print Issn: 1527-1404 Copyright #x000A9; 2018, SEPM (Society for Sedimentary Geology) Journal of Sedimentary Research (2018) 88 (11): 1300–1317. https://doi.org/10.2110/jsr.2018.64 Article history First Online: 27 Nov 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Fresia Ricardi-Branco, Flavia Callefo, Rafael A. Cataldo, Nora Noffke, Luiz Carlos R. Pessenda, Alexandre C. Vidal, Fabio Cardinale Branco; Microbial Biofacies and the Influence of Metazoans in Holocene Deposits of the Lagoa Salgada, Rio De Janeiro State, Brazil. Journal of Sedimentary Research 2018;; 88 (11): 1300–1317. doi: https://doi.org/10.2110/jsr.2018.64 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Sedimentary Research Search Advanced Search Abstract With the emergence of metazoans in the Neoproterozoic, microbialites have declined worldwide. Some hypotheses point to the direct activity of the metazoans, such as the predation of microorganisms that formed the microbial mats, as the reason for the decrease in the occurrence of microbialites since the beginning of Phanerozoic. However, this hypothesis is controversial due to the lack of direct evidence pointing to metazoan effects. Abundant subrecent microbialites and modern microbial mats occur in the Holocene lagoon Lagoa Salgada, Brazil, and its association with metazoans is remarkable. This contribution describes the various modern and fossil microbial biofacies and elucidates the paleoenvironmental evolution. It also investigates whether any interaction between the microbial communities and metazoans affected the morphology of the microbialites. Three biofacies were defined: (i) carbonate-cemented microbialites (CC), (ii) non-cemented planar microbial mats (NC-PM), and (iii) non-cemented cauliflower-shaped microbial mats (NC-CM). Biofacies (ii) and (iii) form biofilm catenae in the S and the SW margin of the lagoon, as a reflection of the current dynamics and relief of the lagoon. The microtextures of the biofacies are described in petrological thin sections analyses and X-ray microtomography. The mineralogy and elemental distribution were analyzed by SEM/EDS and μ-XRF. 14C dating shows that the microbialites were established 2973–3383 cal. yr BP. During that time period the lagoon experienced a greater marine influence. Metazoans associated with microbialites and microbial mats include herbivorous, detritivorous, and opportunistic specimens. They occur filling voids and pores and also the fabrics of the microbialites and microbial mats. Although external factors such as the sedimentary evolution of the lagoon, the closure of the lagoon, its loss of connection with the sea, and the physicochemical changes during the whole process have caused prohibitive effects on the development of the microbialites, the metazoans appear to have a crucial effect on the framework of the bioconstructions, especially during the period with the greatest abundance of metazoans living in association with the microbial mats. 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