Contribution of benthic microalgae to the temporal variation in phytoplankton assemblages in a macrotidal system
|Author(s)||Hernandez Farinas Tania1, 2, Ribeiro Lourenco1, 3, Soudant Dominique2, Belin Catherine2, Bacher Cedric4, Lampert Luis5, Barille Laurent1|
|Affiliation(s)||1 : Univ Nantes, Fac Sci & Tech, Mer Mol Sante EA 2160, 2,Rue Houssiniere BP 92 208, F-44322 Nantes, France.
2 : IFREMER, VIGIES, Rue Ile Yeu,BP 21105, F-44311 Nantes 03, France.
3 : Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal.
4 : IFREMER, Dyneco BENTHOS, BP 70, F-29280 Plouzane, France.
5 : IFREMER, Dyneco Pelagos, BP 70, F-29280 Plouzane, France.
|Source||Journal Of Phycology (0022-3646) (Wiley), 2017-10 , Vol. 53 , N. 5 , P. 1020-1034|
|WOS© Times Cited||7|
|Keyword(s)||co-inertia, dynamic linear models, epipelon, epiphyton, haptobenthos, microphytobenthos growth forms, seasonality, tychoplankton|
Suspended marine benthic microalgae in the water column reflect the close relationship between the benthic and pelagic components of coastal ecosystems. In this study, a 12-year phytoplankton time-series was used to investigate the contribution of benthic microalgae to the pelagic system at a site along the French-Atlantic coast. Furthermore, all taxa identified were allocated into different growth forms in order to study their seasonal patterns. The highest contribution of benthic microalgae was observed during the winter period, reaching up to 60% of the carbon biomass in the water column. The haptobenthic growth form showed the highest contribution in terms of biomass, dominant in the fall-winter period when the turbidity and the river flow were high. The epipelic growth form did not follow any seasonal pattern. The epiphytic diatom Licmophora was most commonly found during summer. As benthic microalgae were found in the water column throughout the year, the temporal variation detected in the structure of pelagic assemblages in a macrotidal ecosystem was partly derived from the differentiated contribution of several benthic growth forms.