Seasonal Characterization of a Marine Sublittoral Area using Epibenthic Protist Communities
The biomass of the protist species present in a marine epibenthonic sublittoral area was studied over a period of 1 yr. The following parameters were measured: temperature, salinity, pH, redox potential, dissolved oxygen, nitrates, nitrites, phosphates, organic matter, conductivity and bacterial biomass. A total of 269 protist species was found, with a biomass of 241.28–17875 mgC m−3, the largest proportion of biomass corresponding to heterotrophic protist. There were 29 most frequent protist species: Lacrymaria caudata, Amphidinium sp., Chromulina psammobia, Cyathomonas truncata, Petalomonas marginalis, Nassula rubens, Tracheloraphis caudatus, Strongylidium arenicola, Litonotus fasciola, Katodinium sp., Aspidisca dentata, Diophrys oligotrix, Eutreptia viridis, Pleuronema setigerum, Euplotes balticus, Dinophysis rotundata, Remanella microstoma, Strombidium compressum, Aspidisca fusca, Gloeodinium marinum, Pavlova salina, Anophrys arenicola, Strombidium sauerbreyae, Pleuronema crassum, Aspidisca cicada, Micromonas pusilla, Phyllomonas simplex, Micromonas squamata and Strombidium dalum. The data regarding the biomass of these species, together with those referring to the other parameters measured, allowed the division of the year into three periods characterized by certain protist species and physicochemical conditions: (1) November–February, (2) March–July and (3) August–November.
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Document Type: Research Article
Publication date: 01 November 1999
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