Data/hora: 09/06/2024 15:50:00

Provedor de dados: | 5
País: | France
Título: | Mapping of Posidonia oceanica beds around Elba Island (western Mediterranean) with integration of direct and indirect methods
Autores: | Piazzi, L; Acunto, S; Cinelli, F.
Data: | 2000-05
Ano: | 2000
Palavras-chave: | Posidonia oceanica; Algues; Cartographie; Sonar latéral; Télédétection aérienne; Méditerranée; Posidonia oceanica; Seagrass; Algae; Mapping; Airborne teledetection; Mediterranean.
Resumo: | Direct and indirect methods were used for mapping Posidonia oceanica beds around Elba Island. Side scan sonar and a visual infra red scanner were used to detect the extension of beds. Also, direct observations were adopted to assess the bed density and to calibrate the indirect methods. Samples of P. oceanica were collected and phenological variables and macroalgal epiphytes were studied to assess the health of the beds. P. oceanica around Elba Island covered an area of 3 680 ha. The largest beds occupied the four main gulfs of the island, characterized by gentle slopes and sandy bottoms. There, the beds showed uniform cover while a patchy structure was common on the rocky and steep bottoms of the western and south-eastern coasts of the island. P. oceanica beds at Elba Island demonstrated a good state of health. The epiphytic algal assemblage of the leaves was dominated by species generally found on this habitat, while, on the rhizomes, we observed a high covering of turf-forming species. The methods adopted allowed accurate maps at a scale of 1:10000. The integration of data obtained both by direct and indirect methods and the precision of the positioning system were particularly important.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00324/43567/44064.pdf

DOI:10.1016/S0399-1784(00)00132-8

http://archimer.ifremer.fr/doc/00324/43567/

Editor: | Gauthier-villars/editions Elsevier
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 2000-05 , Vol. 23 , N. 3 , P. 339-346

Fonte:

2000 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS

info:eu-repo/semantics/openAccess

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