{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T02:06:35Z","timestamp":1773367595679,"version":"3.50.1"},"reference-count":46,"publisher":"Oxford University Press (OUP)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Quintino, V., Freitas, R., Mamede, R., Ricardo, F., Rodrigues, A. M., Mota, J., P\u00e9rez-Ruzafa, \u00c1., and Marcos, C. 2010. Remote sensing of underwater vegetation using single-beam acoustics. \u2013 ICES Journal of Marine Science, 67: 594\u2013605. A single-beam, acoustic, ground-discrimination system (QTC VIEW, Series V) was used to study the distribution of underwater macrophytes in a shallow-water coastal system, employing frequencies of 50 and 200 kHz. The study was conducted in Mar Menor, SE Spain, where the expansion of Caulerpa prolifera has contributed to the silting up of the superficial sediments. A direct relationship was identified between algal biomass and sediment-fines content. Acoustic information on sediment grain size and data on algal biomass were obtained in muddy and sandy sediments, including vegetated and non-vegetated seabed. Non-vegetated muddy areas were created by diving and handpicking the algae. The multivariate acoustic data were analysed under the null hypotheses that there were no acoustic differences between bare seabeds with contrasting superficial sediment types or among low, medium, and high algal-biomass areas, having in mind that grain size can act as a confounding factor. Both null hypotheses were rejected, and the results showed that 200 kHz was better than 50 kHz in distinguishing cover levels of algal biomass. The relationship between the 200-kHz acoustic data and algal biomass suggests utility in modelling the latter using the former.<\/jats:p>","DOI":"10.1093\/icesjms\/fsp251","type":"journal-article","created":{"date-parts":[[2009,11,13]],"date-time":"2009-11-13T20:54:39Z","timestamp":1258145679000},"page":"594-605","source":"Crossref","is-referenced-by-count":28,"title":["Remote sensing of underwater vegetation using single-beam acoustics"],"prefix":"10.1093","volume":"67","author":[{"given":"Victor","family":"Quintino","sequence":"first","affiliation":[{"name":"Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Rosa","family":"Freitas","sequence":"additional","affiliation":[{"name":"Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Renato","family":"Mamede","sequence":"additional","affiliation":[{"name":"Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Fernando","family":"Ricardo","sequence":"additional","affiliation":[{"name":"Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Ana Maria","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Jorge","family":"Mota","sequence":"additional","affiliation":[{"name":"Bioglobal S.A., Avenida Miguel Bombarda 61, 4\u00b0-E, Lisboa, Portugal"}]},{"given":"\u00c1ngel","family":"P\u00e9rez-Ruzafa","sequence":"additional","affiliation":[{"name":"Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, 30 100 Murcia, Spain"}]},{"given":"Concepci\u00f3n","family":"Marcos","sequence":"additional","affiliation":[{"name":"Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, 30 100 Murcia, Spain"}]}],"member":"286","published-online":{"date-parts":[[2009,11,13]]},"reference":[{"key":"2019081212160851200_FSP251C1","first-page":"214","article-title":"PERMANOVA+ for PRIMER: guide to software and statistical methods","author":"Anderson","year":"2008"},{"key":"2019081212160851200_FSP251C2","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1016\/j.ecss.2006.01.026","article-title":"Seagrass landscapes and their effects on associated fauna: a review","volume":"68","author":"Bostr\u00f6m","year":"2006","journal-title":"Estuarine, Coastal and Shelf Science"},{"key":"2019081212160851200_FSP251C3","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/S0022-0981(01)00236-2","article-title":"Effect of patch size and in-patch location on the infaunal macroinvertebrate assemblages of Zostera marina seagrass beds","volume":"259","author":"Bowden","year":"2001","journal-title":"Journal of Experimental Marine Biology and Ecology"},{"key":"2019081212160851200_FSP251C4","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1006\/ecss.2001.0841","article-title":"Small-scale mapping of seabed assemblages in the eastern English Channel using sidescan sonar and remote sampling techniques","volume":"54","author":"Brown","year":"2002","journal-title":"Estuarine, Coastal and Shelf Science"},{"key":"2019081212160851200_FSP251C5","first-page":"190","article-title":"PRIMER v6: User Manual\/Tutorial","author":"Clarke","year":"2006"},{"key":"2019081212160851200_FSP251C6","first-page":"172","article-title":"Change in Marine Communities: an Approach to Statistical Analysis and Interpretation","author":"Clarke","year":"2001","edition":"2nd edn."},{"key":"2019081212160851200_FSP251C7","doi-asserted-by":"crossref","first-page":"415","DOI":"10.1016\/j.rse.2005.02.017","article-title":"Retrospective seagrass change detection in a shallow coastal tidal Australian lake","volume":"97","author":"Dekker","year":"2005","journal-title":"Remote Sensing of Environment"},{"key":"2019081212160851200_FSP251C8","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1111\/j.1365-3091.1968.tb01101.x","article-title":"Grain size indices, classification and environment","volume":"10","author":"Doeglas","year":"1968","journal-title":"Sedimentology"},{"key":"2019081212160851200_FSP251C9","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1016\/j.ecss.2004.11.014","article-title":"Differences in macrofaunal and seagrass beds with and without seaweed farms","volume":"63","author":"Ekl\u00f6f","year":"2005","journal-title":"Estuarine, Coastal and Shelf Science"},{"key":"2019081212160851200_FSP251C10","first-page":"189","article-title":"Sound Underwater Images. 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