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Provedor de dados:  ArchiMer
País:  France
Título:  Tidal cycle control of biogeochemical and ecological properties of a macrotidal ecosystem
Autores:  Cadier, Mathilde
Gorgues, Thomas
Lhelguen, Stephane
Sourisseau, Marc
Memery, Laurent
Data:  2017-08
Ano:  2017
Palavras-chave:  Macrotidal ecosystem
Neap tidal cycle
Semidiurnal cycle
Phytoplankton communities
Resumo:  In some regions, tidal energy can be a key factor in the generation of variability in physical and biogeochemical properties throughout the water column. We use a numerical model resolving tidal cycles and simulating diversity in phytoplankton to assess the impact of tidal mixing on vertical stability and phytoplankton community (total biomass and diversity) in a macrotidal sea (Iroise Sea, France). Two different time scales have been considered: semi-diurnal and spring/neap tidal cycles. Our results show that the latter is the one primarily influencing the phytoplankton growth conditions by modifying the vertical stratification. During spring tide, the growth is rather light-limited whereas neap tide conditions lead to vertical stabilization and better light conditions in the shallow surface layer. The transition from high to low tidal mixing conditions is thus associated with a total phytoplankton biomass increase (caused by the rapid development of fast-growing diatoms) and reduced phytoplankton diversity.
Tipo:  Text
Idioma:  Inglês

Editor:  Amer Geophysical Union
Formato:  application/pdf
Fonte:  Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2017-08 , Vol. 44 , N. 16 , P. 8453-8462
Direitos:  2017 American Geophysical Union. All rights reserved.


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