Data/hora: 08/06/2024 10:24:34

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Analyse et modélisation des évolutions à long terme de la biodiversité phytoplanctonique dans les zones côtières sous l’effet des pressions environnementales et anthropiques
Autores: | Hernandez Farinas, Tania.
Data: | 2015-04-10
Ano: | 2015
Palavras-chave: | Variation temporelle; Niche ecologique; Forme de vie; Modele dynamique lineaire; Methode multi-tableaux; Temporal variation; Ecological niche; Life-forms; Dynamic linear model; Multi-table analysis.
Resumo: | Coastal areas are highly-dynamic systems exposed to the effect of climate variations and human impacts, influencing the community diversity. In these ecosystems, the phytoplankton constitutes the base of food webs and integrates the effects of global changes and quality variations of coastal waters. In this context, the general objective of this study was to assess the long-term changes in the diversity of phytoplankton communities in coastal waters at different dcales and levels of organisation. Firstly, the data collected by the Phytoplankton and Phycotoxin Monitoring Network from the IFREMER was examined to study the temporal variations of the assemblages within the last two decades along the French coast and to assess the relationship with the modifications in their environment. Generally, long-term trends are not identical across the different coastal zones, noting that these changes may have a strong local or regional component which is a characteristic of coastal ecosystems. The second part focuses on the study of environmental conditions favorable to the presence of a number of phytoplankton units. The ecological niche of these units was characterized by their marginality, their tolerance and their degree of overlap, providing information about taxon indicator of specific environmental conditions. Finally, the contribution of benthic taxa to phytoplankton assemblages has been analyzed using their life-forms and the temporal dynamic of their resuspention in the water column.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00315/42648/42032.pdf

http://archimer.ifremer.fr/doc/00315/42648/

Editor: | Université Nantes
Formato: | application/pdf

Fonte:

2015 Université de Nantes

info:eu-repo/semantics/openAccess

restricted use