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| Ody, Anouck; Thibaut, Thierry; Berline, Léo; Changeux, Thomas; André, Jean-michel; Chevalier, Cristèle; Blanfuné, Aurélie; Blanchot, Jean; Ruitton, Sandrine; Stiger-pouvreau, Valerie; Connan, Solène; Grelet, Jacques; Aurelle, Didier; Guéné, Mathilde; Bataille, Hubert; Bachelier, Celine; Guillemain, Dorian; Schmidt, Natascha; Fauvelle, Vincent; Guasco, Sophie; Ménard, Frédéric. |
| The present study reports on observations carried out in the Tropical North Atlantic in summer and autumn 2017, documenting Sargassum aggregations using both ship-deck observations and satellite sensor observations at three resolutions (MSI-10 m, OLCI-300 m, VIIRS-750 m and MODIS-1 km). Both datasets reported that in summer, Sargassum aggregations were mainly observed off Brazil and near the Caribbean Islands, while they accumulated near the African coast in autumn. Based on in situ observations, we propose a five-class typology allowing standardisation of the description of in situ Sargassum raft shapes and sizes. The most commonly observed Sargassum raft type was windrows, but large rafts composed of a quasi-circular patch hundreds of meters wide were... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00514/62609/66969.pdf |
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| Boudouresque, Charles-françois; Blanfuné, Aurélie; Pergent, Gérard; Thibaut, Thierry. |
| Some species of seagrasses (e.g., Zostera marina and Posidonia oceanica) have declined in the Mediterranean, at least locally. Others are progressing, helped by sea warming, such as Cymodocea nodosa and the non-native Halophila stipulacea. The decline of one seagrass can favor another seagrass. All in all, the decline of seagrasses could be less extensive and less general than claimed by some authors. Natural recolonization (cuttings and seedlings) has been more rapid and more widespread than was thought in the 20th century; however, it is sometimes insufficient, which justifies transplanting operations. Many techniques have been proposed to restore Mediterranean seagrass meadows. However, setting aside the short-term failure or half-success of... |
| Tipo: Text |
Palavras-chave: Cymodocea nodosa; Ecosystem diversity; Mediterranean; Natural recolonization; Posidonia oceanica; Seagrass decline; Seagrass restoration; Transplanting; Zostera marina. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00689/80083/83113.pdf |
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