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

dc.check.date2019-09-28
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisher.en
dc.contributor.authorLim, Aaron
dc.contributor.authorKane, Adam
dc.contributor.authorArnaubec, Aurélien
dc.contributor.authorWheeler, Andrew J.
dc.contributor.funderMarine Instituteen
dc.date.accessioned2017-12-20T11:16:36Z
dc.date.available2017-12-20T11:16:36Z
dc.date.issued2017-09-28
dc.description.abstractCold-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.sponsorshipMarine Institute (2011 and 2015 Ship Time Programme of the National Development Plan)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLim, 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.2017.09.008en
dc.identifier.doi10.1016/j.margeo.2017.09.008
dc.identifier.endpage32en
dc.identifier.issn0025-3227
dc.identifier.journaltitleMarine Geologyen
dc.identifier.startpage22en
dc.identifier.urihttps://hdl.handle.net/10468/5199
dc.identifier.volume395en
dc.language.isoenen
dc.publisherElsevier 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.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectCold water coralsen
dc.subjectMoundsen
dc.subjectVideo survey designen
dc.subjectSedimentsen
dc.subjectHabitat mappingen
dc.titleSeabed image acquisition and survey design for cold water coral mound characterisationen
dc.typeArticle (peer-reviewed)en
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