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High resolution mapping of a cold water coral mound
Conti, Luis A.; Lim, Aaron; Wheeler, Andrew J.
Cold-water coral (CWC) mounds are biogenic, long-lived morphostructures composed primarily by scleractinian CWC’s and hemipelagic sediments that form complex deep-sea microhabitats found globally but specifically along the European-Atlantic margin. In this work, high-resolution mapping was applied to identify individual organismal distribution and zonation across a CWC Piddington Mound within the Porcupine Seabight, Ireland Margin. Marine Object-Based Image Analysis (MOBIA) and different machine learning classification methods (decision tree, logistic regression, and deep neural network) were applied to a high-resolution (2 mm) reef-scale video mosaic and ROV-mounted multibeam data in order to provide new insights into the spatial organization of coral frameworks and environmental factors on CWC mounds. The results showed an accurate quantification of the amount of Coral Framework (14.5%; ~2% live and ~12.5% dead) and sponges (~3.5%) with heterogeneous distribution, restricted to a certain portion of the mound. This is the first object level quantification of live and dead coral framework facies and individual sponges across an entire CWC mound. This approach has application for habitat and conservation studies, provides a quantification tool for carbon budget assessments and can provide a baseline to assess CWC mound change. The approach can also be modified for application in other habitats.
Keyword(s): Marine biology; Geomorphology; High resolution mapping (HRM); Cold-water coral (CWC)
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Marine Institute; Science Foundation Ireland
Citation(s): Conti, L. A., Lim, A. and Wheeler, A. J. (2019) 'High resolution mapping of a cold water coral mound', Scientific Reports, 9(1), 15pp. DOI: 10.1038/s41598-018-37725-x
Publisher(s): Springer Nature Switzerland AG
File Format(s): application/pdf
Related Link(s):
First Indexed: 2019-02-19 06:30:28 Last Updated: 2019-03-12 06:33:49