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Chatragadda Ramesh, Sadhukhan K, T. Shunmugaraj, M.V. Ramana Murthy. Occurrence of opportunistic invasive macroalgal genus Caulerpa and Halimeda opuntia in coral reefs of Gulf of Mannar. JOURNAL OF THREATENED TAXA 2023. [DOI: 10.11609/jott.4744.15.3.22883-22888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023] Open
Abstract
nvestigations on indigenous and non-indigenous invasive flora and fauna of a certain geographical area are always important to assess their impact on native biodiversity and control their spread by making conservation strategies to protect biodiversity. In this study, we have encountered overwhelming growth of six seaweed species, Caulerpa racemosa, C. serrulata, C. sertularioides, C. taxifolia, C. peltata, and Halimeda opuntia on the reef flat. These algal covers on reef area appear to compete with coral polyps and restrict their settlement and resilience. Our concern on invasive species distribution in Gulf of Mannar revealed these overgrowing invasive species, which can become potential threats to coral reefs, benthic diversity, and reef assemblage. These observations will help us to develop multidisciplinary management approaches related to the expansion, mitigation, and control of these opportunistic invasive species. Further seasonal monitoring on these algal species is under process to investigate their spatial shift patterns on various coral forms.
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Repullés M, López-Márquez V, Templado J, Taviani M, Machordom A. Genetic Structure of the Endangered Coral Cladocora caespitosa Matches the Main Bioregions of the Mediterranean Sea. Front Genet 2022; 13:889672. [PMID: 35957690 PMCID: PMC9360616 DOI: 10.3389/fgene.2022.889672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
Abstract
Population connectivity studies are a useful tool for species management and conservation planning, particular of highly threatened or endangered species. Here, we evaluated the genetic structure and connectivity pattern of the endangered coral Cladocora caespitosa across its entire distribution range in the Mediterranean Sea. Additionally, we examined the relative importance of sexual and asexual reproduction in the studied populations and their genetic diversity. A total of 541 individuals from 20 localities were sampled and analysed with 19 polymorphic microsatellite markers. Of the genotyped individuals, 482 (89%) had unique multilocus genotypes. Clonality percentages of the populations varied from 0% (in eight populations) to nearly 69% (in one population from Crete). A heterozygosity deficit and a high degree of inbreeding was the general trend in our data set. Population differentiation in C. caespitosa was characterised by significant pairwise FST values with lower ones observed at an intraregional scale and higher ones, between populations from different biogeographic regions. Genetic structure analyses showed that the populations are divided according to the three main sub-basins of the Mediterranean Sea: the Western (Balearic, Ligurian and Tyrrhenian seas), the Central (Adriatic and Ionian seas) and the Eastern (Levantine and Aegean seas), coinciding with previously described gene flow barriers. However, the three easternmost populations were also clearly separated from one another, and a substructure was observed for the other studied areas. An isolation-by-distance pattern was found among, but not within, the three main population groups. This substructure is mediated mainly by dispersal along the coastline and some resistance to larval movement through the open sea. Despite the low dispersal ability and high self-recruitment rate of C. caespitosa, casual dispersive events between regions seem to be enough to maintain the species’ considerable genetic diversity. Understanding the population connectivity and structure of this endangered scleractinian coral allows for more informed conservation decision making.
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Affiliation(s)
- Mar Repullés
- Department Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, MNCN (CSIC), Madrid, Spain
| | - Violeta López-Márquez
- Department Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, MNCN (CSIC), Madrid, Spain
| | - José Templado
- Department Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, MNCN (CSIC), Madrid, Spain
| | - Marco Taviani
- ISMAR-CNR, Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Italy
- Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Annie Machordom
- Department Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, MNCN (CSIC), Madrid, Spain
- *Correspondence: Annie Machordom,
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Máximo P, Ferreira LM, Branco P, Lima P, Lourenço A. Secondary Metabolites and Biological Activity of Invasive Macroalgae of Southern Europe. Mar Drugs 2018; 16:md16080265. [PMID: 30072602 PMCID: PMC6117733 DOI: 10.3390/md16080265] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 07/29/2018] [Accepted: 07/31/2018] [Indexed: 02/06/2023] Open
Abstract
In this review a brief description of the invasive phenomena associated with algae and its consequences on the ecosystem are presented. Three examples of invasive algae of Southern Europe, belonging to Rodophyta, Chlorophyta, and Phaeophyta, were selected, and a brief description of each genus is presented. A full description of their secondary metabolites and biological activity is given and a summary of the biological activity of extracts is also included. In Asparagopsis we encounter mainly halogenated compounds. From Caulerpa, several terpenoids and alkaloids were isolated, while in Sargassum, meroterpenoids prevail.
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Affiliation(s)
- Patrícia Máximo
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
| | - Luísa M Ferreira
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
| | - Paula Branco
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
| | - Pedro Lima
- Sea4Us-Biotecnologia de Recursos Marinhos, Ltd., 8650-378 Sagres, Portugal.
- Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, 1169-056 Lisboa, Portugal.
| | - Ana Lourenço
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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Greff S, Aires T, Serrão EA, Engelen AH, Thomas OP, Pérez T. The interaction between the proliferating macroalga Asparagopsis taxiformis and the coral Astroides calycularis induces changes in microbiome and metabolomic fingerprints. Sci Rep 2017; 7:42625. [PMID: 28218290 PMCID: PMC5317032 DOI: 10.1038/srep42625] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 01/13/2017] [Indexed: 12/12/2022] Open
Abstract
Mediterranean Sea ecosystems are considered as hotspots of biological introductions, exposed to possible negative effects of non–indigenous species. In such temperate marine ecosystems, macroalgae may be dominant, with a great percentage of their diversity represented by introduced species. Their interaction with temperate indigenous benthic organisms have been poorly investigated. To provide new insights, we performed an experimental study on the interaction between the introduced proliferative red alga Asparagopsis taxiformis and the indigenous Mediterranean coral Astroides calycularis. The biological response measurements included meta–barcoding of the associated microbial communities and metabolomic fingerprinting of both species. Significant changes were detected among both associated microbial communities, the interspecific differences decreasing with stronger host interaction. No short term effects of the macroalga on the coral health, neither on its polyp activity or its metabolism, were detected. In contrast, the contact interaction with the coral induced a change in the macroalgal metabolomic fingerprint with a significant increase of its bioactivity against the marine bacteria Aliivibrio fischeri. This induction was related to the expression of bioactive metabolites located on the macroalgal surface, a phenomenon which might represent an immediate defensive response of the macroalga or an allelopathic offense against coral.
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Affiliation(s)
- Stéphane Greff
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, IMBE UMR 7263 CNRS/IRD/Aix Marseille Université/Avignon Université. Station Marine d'Endoume, rue de la Batterie des Lions, 13007 Marseille, France
| | - Tânia Aires
- CCMAR-CIMAR Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Ester A Serrão
- CCMAR-CIMAR Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Aschwin H Engelen
- CCMAR-CIMAR Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Olivier P Thomas
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, IMBE UMR 7263 CNRS/IRD/Aix Marseille Université/Avignon Université. Station Marine d'Endoume, rue de la Batterie des Lions, 13007 Marseille, France.,GEOAZUR, UMR 7329 CNRS/Université de Nice Sophia Antipolis, Faculté des Sciences, Parc Valrose 06108, Nice, France.,Marine Biodiscovery, School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland
| | - Thierry Pérez
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale, IMBE UMR 7263 CNRS/IRD/Aix Marseille Université/Avignon Université. Station Marine d'Endoume, rue de la Batterie des Lions, 13007 Marseille, France
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