Data/hora: 01/06/2024 18:31:23

Provedor de dados: | 5
País: | France

Título:

Ecologie de la faune associée aux émissions de fluides froids de Méditerranée orientale profonde

Ecology of the fauna associated with cold-seeps in the deep eastern Mediterranean Sea

Autores: | Ritt, Benedicte.
Data: | 2010-04-23
Ano: | 2010
Palavras-chave: | Emissions de fluides froids; Volcans de boue; Pockmarks; Méditerranée orientale; Faune benthique; Conditions environnementales; Indices de diversité; Cold seeps; Eastern Mediterranean; Mud volcanoes; Pockmarks; Benthic fauna; Environmental conditions; Diversity indices.
Resumo: | The major objectives of this thesis were to study the structure, functioning and dynamics of different faunal assemblages associated with cold seep ecosystems in the eastern Mediterranean Sea. We focused our study on three main sites: the Marmara Sea, the Mediterranean ridge and the Nile deep sea fan. This thesis aims at determining the environmental signature of Mediterranean sites and the characteristics of the associated fauna at European and global scales. The specific objectives were to (1) determine the composition, diversity, density, biomass of invertebrate assemblages, (2) characterize biogeochemical conditions within different microhabitats in the vicinity of organisms, (3) to define the trophic relationships amongst seep fauna using stable isotope analyses (collaboration) and lastly, (4) to compare the spatial distribution and assemblage characteristics at different spatial scales (local, structure-scale, regional). The results show that (1) the Napoli mud volcano is the richest structure in terms of numbers of taxa while the Nile deep-sea fan sites need additional sampling, (2) a high variability is observed both between the different microhabitats but also within a single microhabitat, (3) the methane and oxygen gradients as well as substratum type are the main structuring factors explaining the distribution of the fauna and (4) the characteristics of the microhabitats, rather than the study area, influence the structure of benthic communities associated with Mediterranean cold seeps.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/00020/13138/10178.pdf
Editor: | Université de Bretagne Occidentale
Relação: | http://archimer.ifremer.fr/doc/00020/13138/
Formato: | application/pdf
Fonte: | 2010 The Author, UBO