Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico

Apparent threats to the spatial distribution of seagrass in San Quintín Bay prompted us to make a detailed assessment of habitats in the bay. Six coastal habitats and three seagrass subclasses were delineated using airborne digital multispectral videography (DMSV). Eelgrass, Zostera marina, was the...

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Autores principales:	Ward, DH, Lee-Tibbitts, T, Morton, A, Carrera-González, E, Kempka, R
Formato:	info:eu-repo/semantics/article
Lenguaje:	eng
Publicado:	Iniversidad Autónoma de Baja California 2004
Materias:	San Quintín Bay airborne digital multispectral videography seagrass distribution Ruppia maritima Zostera marina Bahía San Quintín videografía multiespectral digital distribución de pastos marinos
Acceso en línea:	https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/121
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id	repositorioinstitucional-20.500.12930-7353
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spelling	repositorioinstitucional-20.500.12930-73532023-05-09T14:30:22Z Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico Uso de videografía multiespectral digital para evaluar la distribución del pasto marino en Bahía San Quintín, Baja California, México Ward, DH Lee-Tibbitts, T Morton, A Carrera-González, E Kempka, R San Quintín Bay airborne digital multispectral videography seagrass distribution Ruppia maritima Zostera marina Bahía San Quintín videografía multiespectral digital distribución de pastos marinos Ruppia maritima Zostera marina Apparent threats to the spatial distribution of seagrass in San Quintín Bay prompted us to make a detailed assessment of habitats in the bay. Six coastal habitats and three seagrass subclasses were delineated using airborne digital multispectral videography (DMSV). Eelgrass, Zostera marina, was the predominant seagrass and covered 40% (1949 ha) of the areal extent of the bay in 1999. Eelgrass grew over a wide range of tidal depths from about –3.0 m mean lower low water (MLLW) to about 1.0 m MLLW, but greatest spatial extent occurred in intertidal areas –0.6 m to 1.0 m MLLW. Exposed-continuous (i.e., high density) eelgrass was the most abundant habitat in the bay. Widgeongrass, Ruppia maritima, was the only other seagrass present and covered 3% (136 ha) of the areal extent of the entire bay. Widgeongrass grew in single species stands in the upper intertidal (≥ 0.4 MLLW) and intermixed with eelgrass at lower tidal depths. Overall accuracy of the six habitat classes and three subclasses in the DMSV map was relatively high at 84%. Our detailed map of San Quintín Bay can be used in future change detection analyses to monitor the health of seagrasses in the bay. Dada la existencia de aparentes amenazas para la distribución espacial del pasto marino, se llevó a cabo una evaluación detallada de los hábitats de Bahía San Quintín. Se delimitaron seis hábitats costeros y se identificaron tres subclases de pasto marino usando videografía multiespectral digital (DMSV) aérea. El pasto Zostera marina fue el predominante, cubriendo en 1999 el 40% (1949 ha) de la extensión superficial de la bahía. Zostera marina crecía sobre un amplio rango de profundidades de marea desde –3.0 m del nivel medio inferior de bajamar (MLLW) hasta cerca de 1.0 m del MLLW, pero su mayor extensión superficial ocurrió en la zona entre mareas de –0.6 m a 1.0 m MLLW. De todos los hábitats de la bahía, los mantos continuos (i.e. de gran densidad) de Z. marina expuesta fueron los más abundantes. El único otro pasto marino presente fue Ruppia maritima, que cubría el 3% (136 ha) de la extensión superficial total de la bahía. Este pasto se encontraba creciendo en mantos monoespecíficos en la intermareal superior (≥ 0.4 MLLW), e intercalado con Z. marina a bajas profundidades de marea. La precisión global de las 6 clases de hábitat y de las 3 subclases en el mapa de DMSV fue relativamente alta en un 84%. El mapa detallado obtenido para Bahía San Quintín puede ser utilizado para detectar cambios futuros y dar seguimiento al estado de salud de los pastos marinos en la bahía. 2004-03-06 2021-06-03T03:55:01Z 2021-06-03T03:55:01Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/121 10.7773/cm.v30i11.121 https://hdl.handle.net/20.500.12930/7353 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/121/100 application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 30 No. 1A (2004); 47-60 Ciencias Marinas; Vol. 30 Núm. 1A (2004); 47-60 2395-9053 0185-3880
institution	Repositorio Institucional
collection	DSpace
language	eng
topic	San Quintín Bay airborne digital multispectral videography seagrass distribution Ruppia maritima Zostera marina Bahía San Quintín videografía multiespectral digital distribución de pastos marinos Ruppia maritima Zostera marina
spellingShingle	San Quintín Bay airborne digital multispectral videography seagrass distribution Ruppia maritima Zostera marina Bahía San Quintín videografía multiespectral digital distribución de pastos marinos Ruppia maritima Zostera marina Ward, DH Lee-Tibbitts, T Morton, A Carrera-González, E Kempka, R Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
description	Apparent threats to the spatial distribution of seagrass in San Quintín Bay prompted us to make a detailed assessment of habitats in the bay. Six coastal habitats and three seagrass subclasses were delineated using airborne digital multispectral videography (DMSV). Eelgrass, Zostera marina, was the predominant seagrass and covered 40% (1949 ha) of the areal extent of the bay in 1999. Eelgrass grew over a wide range of tidal depths from about –3.0 m mean lower low water (MLLW) to about 1.0 m MLLW, but greatest spatial extent occurred in intertidal areas –0.6 m to 1.0 m MLLW. Exposed-continuous (i.e., high density) eelgrass was the most abundant habitat in the bay. Widgeongrass, Ruppia maritima, was the only other seagrass present and covered 3% (136 ha) of the areal extent of the entire bay. Widgeongrass grew in single species stands in the upper intertidal (≥ 0.4 MLLW) and intermixed with eelgrass at lower tidal depths. Overall accuracy of the six habitat classes and three subclasses in the DMSV map was relatively high at 84%. Our detailed map of San Quintín Bay can be used in future change detection analyses to monitor the health of seagrasses in the bay.
format	info:eu-repo/semantics/article
author	Ward, DH Lee-Tibbitts, T Morton, A Carrera-González, E Kempka, R
author_facet	Ward, DH Lee-Tibbitts, T Morton, A Carrera-González, E Kempka, R
author_sort	Ward, DH
title	Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
title_short	Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
title_full	Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
title_fullStr	Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
title_full_unstemmed	Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico
title_sort	use of digital multispectral videography to assess seagrass distribution in san quintín bay, baja california, mexico
publisher	Iniversidad Autónoma de Baja California
publishDate	2004
url	https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/121
_version_	1792608726496051200

Use of digital multispectral videography to assess seagrass distribution in San Quintín Bay, Baja California, Mexico

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