Data/hora: 11/06/2024 06:34:05

Provedor de dados: | 5
País: | France
Título: | Temporal and spatial changes of seagrass meadows in a Mediterranean coastal lagoon
Autores: | Agostini, S; Marchand, B; Pergent, G.
Data: | 2002-11
Ano: | 2002
Palavras-chave: | Phanérogames; Lagune méditerranéenne; Traitement d’image; Évolution d’écosystème; Seagrasses; Mediterranean lagoon; Image processing; Change detection.
Resumo: | Aerial photographs and in situ data of the Urbinu Lagoon (one of the largest and deepest ponds in Corsica, Mediterranean Sea) permit the establishment of a cartography of its aquatic benthic assemblages and types of sea-beds. It was possible to distinguish in the photographs submerged structures such as: sand, pebbles, mud and seagrass meadows. Seagrass beds were the predominant vegetation type in this lagoon (comprising 14-29% of the total area depending on the year studied), and their distribution was incorporated into a geographical information database, and then compared with historical data. Temporal and spatial change in seagrass meadows was assessed between 1990 and 1997. Change in total extent was evaluated through a map to map comparison of data interpreted from image processing using colored aerial photographs (1990, 1994 and 1997). The overall net change was a 12% decrease between 1990 and 1994 and a 16% increase between 1994 and 1997. These observations imply that regressions are not irreversible over the past 7 years, and show that seagrass meadows in this area have been stable despite environmental perturbations, since the lost zones were recolonized.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00322/43296/43032.pdf

DOI:10.1016/S0399-1784(02)01196-9

http://archimer.ifremer.fr/doc/00322/43296/

Editor: | Gauthier-villars/editions Elsevier
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 2002-11 , Vol. 25 , N. 6 , P. 297-302

Fonte:

2002 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS. All rights reserved.

info:eu-repo/semantics/openAccess

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