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Article

Testing Side-Scan Sonar and Multibeam Echosounder to Study Black Coral Gardens: A Case Study from Macaronesia

1
Grupo en Biodiversidad y Conservación (IU-ECOAQUA), Universidad de Las Palmas de Gran Canaria, 35200 Telde, Spain
2
Leibniz Institute for Baltic Sea Research Warnemünde (IOW), 18119 Warnemünde, Germany
3
Asociación Biodiversidad Atlántica y Sostenibilidad (ABAS), 25200 Telde, Spain
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Remote Sens. 2020, 12(19), 3244; https://doi.org/10.3390/rs12193244
Received: 11 September 2020 / Revised: 28 September 2020 / Accepted: 29 September 2020 / Published: 6 October 2020
(This article belongs to the Special Issue Remote Sensing of Islands)
Black corals (order Antipatharia) are important components of mesophotic and deep-water marine communities, but due to their inaccessibility, there is limited knowledge about the basic aspects of their distribution and ecology. The aim of this study was to test methodologies to map and study colonies of a branched antipatharian species, Antipathella wollastoni, in the Canary Islands (Spain). Acoustic tools, side-scan sonar (SSS), and a multibeam echosounder (MBES), coupled with ground-truthing video surveys, were used to determine the habitat characteristics of Antipathella wollastoni. Below 40 m depth, colonies of increasing height (up to 1.3 m) and abundance (up to 10 colonies/m2) were observed, particularly on steep and current-facing slopes on rocky substrates. However, coral presence was not directly imaged on backscatter mosaics and bathymetric data. To improve this situation, promising initial attempts of detecting Antipathella wollastoni by utilizing the MBES water column scatter in an interval for 0.75 m to 1 m above the seafloor are reported. View Full-Text
Keywords: acoustic technologies; seafloor mapping; spatial analysis; bathymetry; mesophotic habitats; Antipathella wollastoni; Atlantic acoustic technologies; seafloor mapping; spatial analysis; bathymetry; mesophotic habitats; Antipathella wollastoni; Atlantic
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MDPI and ACS Style

Czechowska, K.; Feldens, P.; Tuya, F.; Cosme de Esteban, M.; Espino, F.; Haroun, R.; Schönke, M.; Otero-Ferrer, F. Testing Side-Scan Sonar and Multibeam Echosounder to Study Black Coral Gardens: A Case Study from Macaronesia. Remote Sens. 2020, 12, 3244. https://doi.org/10.3390/rs12193244

AMA Style

Czechowska K, Feldens P, Tuya F, Cosme de Esteban M, Espino F, Haroun R, Schönke M, Otero-Ferrer F. Testing Side-Scan Sonar and Multibeam Echosounder to Study Black Coral Gardens: A Case Study from Macaronesia. Remote Sensing. 2020; 12(19):3244. https://doi.org/10.3390/rs12193244

Chicago/Turabian Style

Czechowska, Karolina, Peter Feldens, Fernando Tuya, Marcial Cosme de Esteban, Fernando Espino, Ricardo Haroun, Mischa Schönke, and Francisco Otero-Ferrer. 2020. "Testing Side-Scan Sonar and Multibeam Echosounder to Study Black Coral Gardens: A Case Study from Macaronesia" Remote Sensing 12, no. 19: 3244. https://doi.org/10.3390/rs12193244

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