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Benthic Communities of Mesophotic Coral Ecosystem off Puducherry, East Coast of India


Affiliations
1 ICAR-Madras Research Centre of the Central Marine Fisheries Research Institute, Chennai 600 028, India
2 ICAR-Vizhinjam Research Centre of the Central Marine Fisheries Research Institute, Cochin 695 521, India
3 ICAR-Central Marine Fisheries Research Institute, Cochin 682 018, India
 

The shallow coral reef ecosystems along the Indian coast are being threatened by anthropogenic global ocean warming and increased frequency of coral bleaching in the recent past. Identification and conservation of deeper reef habitats are essential as they serve as a source of larvae and livestock to replenish the shallow reef habitats. Information on the location and spatial extent of the mesophotic coral ecosystems (MCEs) and their biodiversity is poorly known in the continental shelf of the east coast of India. In this study, we have documented the species diversity of MCEs at a depth of 30–40 m off Puducherry along the east coast of India. In total, 12 species of corals, including 5 black corals and 16 octocorals, 4 species of sponges and 31 species of coral-associated benthopelagic fish species were recorded. Subergorgia sp. was the most dominant species of octocorals and found extensively as gorgonian forests. The MCEs reported in this study raise important questions about the origin and connectivity of the coral populations in this region to the other major coral reef ecosystems along the east coast. Understanding the physical processes and hydrographic features around the MCEs, off Puducherry will reveal more information about the distribution and colonization of coral communities and their vulnerability to changes in future.

Keywords

Benthic Communities, Gorgonian Forest, Mesophotic Coral Ecosystems, Reef Habitats.
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  • Benthic Communities of Mesophotic Coral Ecosystem off Puducherry, East Coast of India

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Authors

P. Laxmilatha
ICAR-Madras Research Centre of the Central Marine Fisheries Research Institute, Chennai 600 028, India
S. Jasmine
ICAR-Vizhinjam Research Centre of the Central Marine Fisheries Research Institute, Cochin 695 521, India
Miriam Paul Sreeram
ICAR-Central Marine Fisheries Research Institute, Cochin 682 018, India
Periasamy Rengaiyan
ICAR-Madras Research Centre of the Central Marine Fisheries Research Institute, Chennai 600 028, India

Abstract


The shallow coral reef ecosystems along the Indian coast are being threatened by anthropogenic global ocean warming and increased frequency of coral bleaching in the recent past. Identification and conservation of deeper reef habitats are essential as they serve as a source of larvae and livestock to replenish the shallow reef habitats. Information on the location and spatial extent of the mesophotic coral ecosystems (MCEs) and their biodiversity is poorly known in the continental shelf of the east coast of India. In this study, we have documented the species diversity of MCEs at a depth of 30–40 m off Puducherry along the east coast of India. In total, 12 species of corals, including 5 black corals and 16 octocorals, 4 species of sponges and 31 species of coral-associated benthopelagic fish species were recorded. Subergorgia sp. was the most dominant species of octocorals and found extensively as gorgonian forests. The MCEs reported in this study raise important questions about the origin and connectivity of the coral populations in this region to the other major coral reef ecosystems along the east coast. Understanding the physical processes and hydrographic features around the MCEs, off Puducherry will reveal more information about the distribution and colonization of coral communities and their vulnerability to changes in future.

Keywords


Benthic Communities, Gorgonian Forest, Mesophotic Coral Ecosystems, Reef Habitats.

References





DOI: https://doi.org/10.18520/cs%2Fv116%2Fi6%2F982-987