Seabed image acquisition and survey design for cold water coral mound characterisation

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dc.contributor.author Lim, Aaron
dc.contributor.author Kane, Adam
dc.contributor.author Arnaubec, Aurélien
dc.contributor.author Wheeler, Andrew J.
dc.date.accessioned 2017-12-20T11:16:36Z
dc.date.available 2017-12-20T11:16:36Z
dc.date.issued 2017-09-28
dc.identifier.citation Lim, A., Kane, A., Arnaubec, A. and Wheeler, A. J. (2017) ‘Seabed image acquisition and survey design for cold water coral mound characterisation’, Marine Geology, 395, pp. 22-32. doi:10.1016/j.margeo.2017.09.008 en
dc.identifier.volume 395 en
dc.identifier.startpage 22 en
dc.identifier.endpage 32 en
dc.identifier.issn 0025-3227
dc.identifier.uri http://hdl.handle.net/10468/5199
dc.identifier.doi 10.1016/j.margeo.2017.09.008
dc.description.abstract Cold-water coral (CWC) habitats are commonly regarded as hotspots of biodiversity in the deep-sea. However, a standardised approach to monitoring the effects of climate change, anthropogenic impact and natural variability through video-surveying on these habitats is poorly-established. This study is the first attempt at standardising a cost-effective video-survey design specific to small CWC mounds in order to accurately determine the proportion of facies across their surface. The Piddington Mound of the Moira Mounds, Porcupine Seabight, offshore Ireland has been entirely imaged by downward-facing video in 2011 and 2015. The 2011 video data is navigated into a full-mound, georeferenced video mosaic. A quadrat-based manual classification of this video mosaic at 0.25 m2 resolution shows the exact proportion of facies abundance across the mound surface. The minimum number of random downward-facing images from the mound are determined to accurately characterise mound surface facies proportions. This minimum sample size is used to test the effectiveness of various common survey designs for ROV-video-based habitat investigations. Single-pass video lines are not representative of the mound surface whilst gridded survey designs yield best results, similar to 100% mound coverage. The minimum sample size and manual classification are applied to the 2015 video data to show a 19% mound surface facies change over 4 years at 0.25 m2 resolution. The proportion of live coral facies show little change while coral rubble facies show most change. This highlights an inconsistency between temporally-separated data sets and implies that in 20 years, the mound surface may almost entirely change. en
dc.description.sponsorship Marine Institute (2011 and 2015 Ship Time Programme of the National Development Plan) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier B.V. en
dc.rights © 2017, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Cold water corals en
dc.subject Mounds en
dc.subject Video survey design en
dc.subject Sediments en
dc.subject Habitat mapping en
dc.title Seabed image acquisition and survey design for cold water coral mound characterisation en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Aaron Lim, Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland. T: +353-21-490-3000 E: aaron.lim@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2019-09-28
dc.description.version Accepted Version en
dc.contributor.funder Marine Institute en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Marine Geology en


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© 2017, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2017, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
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