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Sunken wood from the Vanuatu Islands: identification of wood substrates and preliminary description of associated fauna ArchiMer
Pailleret, Marie; Haga, Takuma; Petit, Patricia; Prive-gill, Catherine; Saedlou, Nima; Gaill, Francoise; Zbinden, Magali.
Two trawl samples of natural sunken wood collected near Vanuatu were identified based on histological studies. Detailed descriptions were made and microphotographs of the cell types were taken, using the three classical sections (cross, tangential and radial). The botanical characters were compared first to the native flora of Vanuatu, then also to the introduced species. The possibility of transportation by ocean currents with a mainly southern and eastern direction is discussed. The first sample lacks apparent colonization marks. Its main histologic character is the presence of `paedomorphic type I rays' which relates it to the shrubby genera Fitchia (Asteraceae) and Fuchsia (Onagraceae): both are known in Polynesia but they seem not to be recorded from...
Tipo: Text Palavras-chave: Associated fauna; Botanical identification; Sunken wood; Vanuatu; Wood-boring species.
Ano: 2007 URL: https://archimer.ifremer.fr/doc/00205/31627/30048.pdf
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Bacterial communities associated with the wood-feeding gastropod Pectinodonta sp (Patellogastropoda, Mollusca) ArchiMer
Zbinden, Magali; Pailleret, Marie; Ravaux, Juliette; Gaudron, Sylvie M.; Hoyoux, Caroline; Lambourdiere, Josie; Waren, Anders; Lorion, Julien; Halary, Sebastien; Duperron, Sebastien.
Even though their occurrence was reported a long time ago, sunken wood ecosystems at the deep-sea floor have only recently received specific attention. Accumulations of wood fragments in the deep sea create niches for a diverse fauna, but the significance of the wood itself as a food source remains to be evaluated. Pectinodonta sp. is a patellogastropod that exclusively occurs on woody substrates, where individuals excavate deep depressions, and is thus a potential candidate for a wood-eating lifestyle. Several approaches were used on Pectinodonta sampled close to Tongoa island (Vanuatu) to investigate its dietary habits. Host carbon is most likely derived from the wood material based on stable isotopes analyses, and high cellulase activity was measured in...
Tipo: Text Palavras-chave: Sunken woods; Wood-feeding gastropod; Symbiosis; Cellulolytic activity.
Ano: 2010 URL: https://archimer.ifremer.fr/doc/00206/31687/30070.pdf
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