Bioinvasive Seaweed Genus, Turbinaria in Coral Reefs of Gulf of Mannar

Ramesh, Ch.; Sadhukhan, Koushik; Shunmugaraj, T.; Murthy, M.V. Ramana

doi:10.20448/journal.504.2019.61.1.4

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…and Turbinaria sp. were the most dominant species at the reef of GoM (Manikandan and Ravindran 2017;Ramesh et al 2019b). However, the present study recorded that Caulerpa taxifolia, C. racemosa, Ulva reticulata, Padina gymnospora, Turbinaria sp., Sargassum sp., and Halimeda sp.…”

Section: Discussioncontrasting

confidence: 62%

Health monitoring status of corals in Gulf of Mannar and Palk Bay (India) with special reference to coral bleaching event

Sadhukhan

Ramesh

Shunmugaraj

et al. 2022

Indo Pac J Ocean Life

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Abstract. Sadhukhan K, Chatragadda E, Shunmugaraj T, Murthy MVR. 2022. Health monitoring status of corals in Gulf of Mannar and Palk Bay (India) with special reference to coral bleaching event. Indo Pac J Ocean Life 6: 72-84. Coral reef ecosystems are highly important regarding ecological, cultural, and economic values. Unfortunately, these ecosystems are declining rapidly due to climate change and local anthropogenic threats. The present study assessed the coral reef health status in the Gulf of Mannar (GoM) and Palk Bay (PB), India, to understand the diversity and abundance of corals and the bleaching vulnerability of the reef areas. Extensive underwater surveys were conducted from August 2018 to August 2020. Line intercept transect methods were employed in triplicates and estimated the bleaching-mediated reef threats. As a result, the average live coral cover of the Gulf of Mannar was 39.55±15.45% (Mean±SD), and Palk Bay was 28.40±14.60%, of which Mandapam Group of Islands has maximum live coral coverage (51.80±15.10%). Severe coral bleaching was also observed in the Gulf of Mannar and Palk Bay during the summer of two the consecutive year, 2019 and 2020, triggered by increased sea surface temperature (SST) of 4°C-5°C than the average temperature (28°C-31°C). The current study highlights the detailed distribution of the coral community with comparative analysis since 2000 and the adaptive response of native coral species to bleaching events that will help to implement management interventions like coral restoration of those native species to strengthen the reef resilience in the Gulf of Mannar and Palk Bay.

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Section: Discussioncontrasting

confidence: 62%

Health monitoring status of corals in Gulf of Mannar and Palk Bay (India) with special reference to coral bleaching event

Sadhukhan

Ramesh

Shunmugaraj

et al. 2022

Indo Pac J Ocean Life

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“…The algal samples were collected from the Gulf of Mannar and were aseptically transferred to the laboratory. Ramesh et al, 27 fields investigated the Gulf of Mannar and suggested Turbinaria sp. must be exploited for bioactive metabolites of industrial importance.…”

Section: Collection Identification and Extraction Of Seaweedmentioning

confidence: 99%

Antibacterial Potential of Marine Brown Algae Turbinaria Conoides Against Bacteria Associated with Diabetic Foot Ulcer

Suresh¹,

Poonguzhali²,

Anuradha³

et al. 2023

Int J Life Sci Pharm Res

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The marine brown algae Turbinaria conoides was extracted with different solvents, viz., acetone, ethanol, methanol and distilled water. The extracts were screened for the presence of various phytochemicals and examined for antibacterial activity by agar well diffusion method. Diabetic foot ulcer (DFU) associated bacteria and their respective standard strains, such as Staphylococcus aureus ATCC 5923, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 700603 and Enterococcus faecal ATCC 25922 were used as test bacteria. Among the different solvent extracts, the aqueous extract possessed the maximum zone of inhibition against both test and standard bacterial strains. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of the aqueous extract against test pathogens were 128-4μg. The eluent mixture for separating the active fraction was selected by thin layer chromatography (TLC), which was found to be n-hexane: ethylacetate (6:4) with a maximum of four spots. In column chromatography, 25th -27th-minute fractions showed maximum antibacterial activity against all the DFU bacterial strains. Our study aims to find the use of T. conoides for treating DFU-associated bacterial infections. The objectives include exploring different solvent extracts of T. conoides for antibacterial activity and characterization of bioactive metabolite.

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“…and Halimeda sp. in the Gulf of Mannar and Palk Bay coral reefs (Manikandan & Ravindran 2016), and Turbinaria in the Gulf of Mannar corals (Ramesh et al 2019). However, there is very little information on the current distribution patterns of invasive seaweeds around the Gulf of Mannar Islands.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of opportunistic invasive macroalgal genus Caulerpa and Halimeda opuntia in coral reefs of Gulf of Mannar

Ramesh

Sadhukhan²,

Shunmugaraj³

et al. 2023

J. Threat. Taxa

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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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Bioinvasive Seaweed Genus, Turbinaria in Coral Reefs of Gulf of Mannar

Cited by 8 publications

References 26 publications

Health monitoring status of corals in Gulf of Mannar and Palk Bay (India) with special reference to coral bleaching event

Health monitoring status of corals in Gulf of Mannar and Palk Bay (India) with special reference to coral bleaching event

Antibacterial Potential of Marine Brown Algae Turbinaria Conoides Against Bacteria Associated with Diabetic Foot Ulcer

Occurrence of opportunistic invasive macroalgal genus Caulerpa and Halimeda opuntia in coral reefs of Gulf of Mannar

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