Tolerance of Brazilian brain coral Mussismilia braziliensis to sediment and organic matter inputs |
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| Institution: | 1. Grupo de Pesquisa em Recifes de Corais e Mudanças Globais, Instituto de Geologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, CEP 40170-115, Salvador, BA, Brazil;2. Programa de Pós-Graduação em Ecologia e Biomonitoramento – PPG ECOBIO – UFBA, Rua Barão de Jeremoabo, 147, Ondina, CEP 40170-290, Salvador, BA, Brazil;1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;2. State Key Laboratory of Mineral Deposit Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China;3. School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK;4. Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK;5. Department of Mathematics and Geosciences, Università degli Studi di Trieste, via Edoardo Weiss, 2, 34128, Trieste, Italy;1. Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;2. Department of Earth Sciences, University of Oxford,South Parks Road, Oxford OX1 3AN, UK;3. University of Exeter, Camborne School of Mines & Environment and Sustainability Institute, Penryn Campus, Penryn, Cornwall TR10 9FE, UK;4. School of Geosciences, University of Aberdeen, Aberdeen, AB24 3UE, UK;5. Department of Earth Sciences, Durham University, South Road, Durham DH1 3LE, UK;1. Institute of Geology and Geochemistry of Petroleum and Coal, Energy and Mineral Resources Group (EMR), RWTH Aachen University, Lochnerstr. 4-20, 52056 Aachen, Germany;3. Federal Institute for Geoscience and Resources (BGR), Stilleweg 2, 30655 Hannover, Germany;1. Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil;2. Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45, 807-000, Brazil;3. Curso de Oceanologia, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil;4. Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil |
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| Abstract: | In Brazil, where reefs occur in markedly turbid environments, the relationship between sedimentation/organic matter and corals is poorly known. Thus, the ex situ effects of sediment with and without organic matter over the ΔF/Fm and physical state of Mussismilia braziliensis were analyzed. The ΔF/Fm and coral physical state, evaluated through the susceptibility index to sedimentation (SI), were measured in seven colonies exposed to sedimentation (0–450 mg cm?2 day?1) free of organic matter after 45 days of exposure, and in 12 colonies exposed to sedimentation (0–500 mg cm?2 day?1) with organic matter content (10%), in which case ΔF/Fm was measured after 72 h and SI after 120 h. In both cases there were effects of increasing sedimentation on the SI with no effect on ΔF/Fm. Despite the tolerance to high sedimentation rates shown by this coral, we noted that the presence of organic matter might reduce its tolerance to sedimentation stress. |
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| Keywords: | Sedimentation Organic matter Coral Photosynthesis Smothering Necrosis |
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