Low oxygen levels caused by Noctiluca scintillans bloom kills corals in Gulf of Mannar, India
| Autor: | J. K. Patterson Edward, P. K. Dinesh Kumar, T. K. Ashok Kumar, K. Diraviya Raj, A. Arasamuthu, M. Selva Bharath, R. L. Laju, David Obura, G. Mathews |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Coral bleaching Harmful Algal Bloom Science Coral India Environment 01 natural sciences Algal bloom Article Montipora Antibiosis Animals Acropora natural sciences 0105 earth and related environmental sciences geography Multidisciplinary geography.geographical_feature_category Geography Ecology biology Coral Reefs 010604 marine biology & hydrobiology Noctiluca scintillans fungi technology industry and agriculture Hypoxia (environmental) Coral reef biochemical phenomena metabolism and nutrition Anthozoa biology.organism_classification Oxygen Dinoflagellida Medicine Climate sciences geographic locations |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-020-79152-x |
| Popis: | Coral reefs around the world are undergoing severe decline in the past few decades. Mass coral mortalities have predominantly been reported to be caused by coral bleaching or disease outbreaks. Temporary hypoxic conditions caused by algal blooms can trigger mass coral mortalities though are reported rarely. In this study in Gulf of Mannar (GoM), southeast India, we report a significant coral mortality caused by a bloom of the ciguatoxic dinoflagellate Noctiluca scintillans during September–October 2019. Dissolved oxygen levels declined below 2 mg l−1 during the bloom causing temporary hypoxia and mortality (up to 71.23%) in the fast growing coral genera Acropora, Montipora and Pocillopora. Due to global climate change, more frequent and larger algal blooms are likely in the future. Hence, it is likely that shallow water coral reefs will be affected more frequently by episodic hypoxic conditions driven by algal blooms. More studies are, however, required to understand the mechanism of coral mortality due to algal blooms, impacts on community composition and the potential for subsequent recovery. |
| Databáze: | OpenAIRE |
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