Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.

Species rich benthic communities have been reported from some seamounts, predominantly from the Atlantic and Pacific Oceans, but the fauna and habitats on Indian Ocean seamounts are still poorly known. This study focuses on two seamounts, a submarine volcano (cratered seamount--CSM) and a non-volcan...

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Autores principales:	Sabyasachi Sautya, Baban Ingole, Durbar Ray, Sabine Stöhr, Kiranmai Samudrala, K A Kamesh Raju, Abhay Mudholkar
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/acfb13bc77a144b59c1c02c15ee1bc3c
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spelling	oai:doaj.org-article:acfb13bc77a144b59c1c02c15ee1bc3c2021-11-18T06:59:32ZMegafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.1932-620310.1371/journal.pone.0016162https://doaj.org/article/acfb13bc77a144b59c1c02c15ee1bc3c2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21297959/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Species rich benthic communities have been reported from some seamounts, predominantly from the Atlantic and Pacific Oceans, but the fauna and habitats on Indian Ocean seamounts are still poorly known. This study focuses on two seamounts, a submarine volcano (cratered seamount--CSM) and a non-volcano (SM2) in the Andaman Back-arc Basin (ABB), and the basin itself. The main purpose was to explore and generate regional biodiversity data from summit and flank (upper slope) of the Andaman seamounts for comparison with other seamounts worldwide. We also investigated how substratum types affect the megafaunal community structure along the ABB. Underwater video recordings from TeleVision guided Gripper (TVG) lowerings were used to describe the benthic community structure along the ABB and both seamounts. We found 13 varieties of substratum in the study area. The CSM has hard substratum, such as boulders and cobbles, whereas the SM2 was dominated by cobbles and fine sediment. The highest abundance of megabenthic communities was recorded on the flank of the CSM. Species richness and diversity were higher at the flank of the CSM than other are of ABB. Non-metric multi-dimensional scaling (nMDS) analysis of substratum types showed 50% similarity between the flanks of both seamounts, because both sites have a component of cobbles mixed with fine sediments in their substratum. Further, nMDS of faunal abundance revealed two groups, each restricted to one of the seamounts, suggesting faunal distinctness between them. The sessile fauna corals and poriferans showed a significant positive relation with cobbles and fine sediments substratum, while the mobile categories echinoderms and arthropods showed a significant positive relation with fine sediments only.Sabyasachi SautyaBaban IngoleDurbar RaySabine StöhrKiranmai SamudralaK A Kamesh RajuAbhay MudholkarPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 1, p e16162 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sabyasachi Sautya Baban Ingole Durbar Ray Sabine Stöhr Kiranmai Samudrala K A Kamesh Raju Abhay Mudholkar Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
description	Species rich benthic communities have been reported from some seamounts, predominantly from the Atlantic and Pacific Oceans, but the fauna and habitats on Indian Ocean seamounts are still poorly known. This study focuses on two seamounts, a submarine volcano (cratered seamount--CSM) and a non-volcano (SM2) in the Andaman Back-arc Basin (ABB), and the basin itself. The main purpose was to explore and generate regional biodiversity data from summit and flank (upper slope) of the Andaman seamounts for comparison with other seamounts worldwide. We also investigated how substratum types affect the megafaunal community structure along the ABB. Underwater video recordings from TeleVision guided Gripper (TVG) lowerings were used to describe the benthic community structure along the ABB and both seamounts. We found 13 varieties of substratum in the study area. The CSM has hard substratum, such as boulders and cobbles, whereas the SM2 was dominated by cobbles and fine sediment. The highest abundance of megabenthic communities was recorded on the flank of the CSM. Species richness and diversity were higher at the flank of the CSM than other are of ABB. Non-metric multi-dimensional scaling (nMDS) analysis of substratum types showed 50% similarity between the flanks of both seamounts, because both sites have a component of cobbles mixed with fine sediments in their substratum. Further, nMDS of faunal abundance revealed two groups, each restricted to one of the seamounts, suggesting faunal distinctness between them. The sessile fauna corals and poriferans showed a significant positive relation with cobbles and fine sediments substratum, while the mobile categories echinoderms and arthropods showed a significant positive relation with fine sediments only.
format	article
author	Sabyasachi Sautya Baban Ingole Durbar Ray Sabine Stöhr Kiranmai Samudrala K A Kamesh Raju Abhay Mudholkar
author_facet	Sabyasachi Sautya Baban Ingole Durbar Ray Sabine Stöhr Kiranmai Samudrala K A Kamesh Raju Abhay Mudholkar
author_sort	Sabyasachi Sautya
title	Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
title_short	Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
title_full	Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
title_fullStr	Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
title_full_unstemmed	Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.
title_sort	megafaunal community structure of andaman seamounts including the back-arc basin--a quantitative exploration from the indian ocean.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/acfb13bc77a144b59c1c02c15ee1bc3c
work_keys_str_mv	AT sabyasachisautya megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT babaningole megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT durbarray megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT sabinestohr megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT kiranmaisamudrala megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT kakameshraju megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean AT abhaymudholkar megafaunalcommunitystructureofandamanseamountsincludingthebackarcbasinaquantitativeexplorationfromtheindianocean
_version_	1718424125874110464

Megafaunal community structure of Andaman seamounts including the Back-arc Basin--a quantitative exploration from the Indian Ocean.

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