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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. https://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; e-ISSN 1873-1414, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 351860 [ aanvragen ]

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Trefwoorden

ANE, France, Poitou-Charentes, Marennes-Oleron Bay Aquatic communities > Benthos Aquatic communities > Plankton > Phytoplankton Composition > Community composition Environments > Aquatic environment > Pelagic environment Factorial analysis Information > Information processing > Data analysis > Analysis > Statistical analysis > Factorial analysis Time series Marennes-Oléron Bay [Marine Regions] Marien/Kust

Author keywords

phytoplankton; microphytobenthos; community composition; factorialanalysis; time series

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Auteurs		Top
Guarini, J.-M. Gros, P. Blanchard, G.	Richard, P. Fillon, A.

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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.

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