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Benthic contribution to pelagic microalgal communities in two semi-enclosed, European-type littoral ecosystems (Marennes-Oléron Bay and Aiguillon Bay, France)
Guarini, J.-M.; Gros, P.; Blanchard, G.; Richard, P.; Fillon, A. (2004). Benthic contribution to pelagic microalgal communities in two semi-enclosed, European-type littoral ecosystems (Marennes-Oléron Bay and Aiguillon Bay, France). J. Sea Res. 52(4): 241-258. dx.doi.org/10.1016/j.seares.2004.04.003
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101, more
Peer reviewed article  

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Keywords
    Benthos; Community composition; Factorial analysis; Factorial analysis; Pelagic environment; Phytoplankton; Time series; ANE, France, Poitou-Charentes, Marennes-Oleron Bay [Marine Regions]; Marine

Authors  Top | Dataset 
  • Guarini, J.-M.
  • Gros, P.
  • Blanchard, G.
  • Richard, P.
  • Fillon, A.

Abstract
    Long-term changes of the taxonomic composition of the phytoplankton communities of two French littoral ecosystems (Marennes-Oléron Bay and Aiguillon Bay) were investigated in order to estimate the benthic contribution in terms of biomass. A long-term phytoplankton survey (REPHY-IFREMER) provided phytoplankton densities at different taxonomic levels of identification from 1995 to 1999. The database was homogenised at the taxonomic level of the genus and the log10-density was used as an indicator of the biomass. At all stations investigated, a strong seasonality governed the changes in the number of genera and the log10-density. No significant differences were found between the stations. Factorial Correspondence Analyses were performed to provide a typology of sampling dates and corresponding functional groups of genera. Pennate diatoms were dominant in winter periods, while centric diatoms and dinoflagellates characterised summer and fall periods. Moreover, the log10-density of pennate diatoms did not follow a seasonal pattern. The relative contribution of this group, which appeared to be the most representative of the benthic microalgal communities, had a maximum variation range of 1 to 84% and was well correlated with the turbidity recorded at the same time. This study was a first step to provide a frame for further studies about the coupling between benthic and pelagic microalgal biomasses in semi-enclosed European-type littoral ecosystems.

Dataset
  • REPHY: Network Monitoring phytoplankton, more

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