Nanoplankton protists from the western Mediterranean Sea. II. Cryptomonads (Cryptophyceae = Crptomonadea)

Novarino, Gianfranco

doi:10.3989/scimar.2005.69n147

Cited by 22 publications

(37 citation statements)

References 48 publications

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“…Similarly, smaller cyptophytes cells were observed during the summer-autumn Mixotrophic haptophytes in oligotrophic coastal seawater F Unrein et al period. A detailed analysis of the plankton from the western Mediterranean Sea (Novarino, 2005) revealed the presence of 6 different genus of cryptophytes (Chroomonas, Cryptochloris, Hemiselmis, Plagioselmis, Rhinomonas and Teleaulax) and 11 species. The variations in average cell volume here reported potentially correspond to changes in species composition during different periods of the year.…”

Section: Pico-and Nanophytoplankton Compositionmentioning

confidence: 99%

Mixotrophic haptophytes are key bacterial grazers in oligotrophic coastal waters

et al. 2013

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Grazing rate estimates indicate that approximately half of the bacterivory in oligotrophic oceans is due to mixotrophic flagellates (MFs). However, most estimations have considered algae as a single group. Here we aimed at opening the black-box of the phytoflagellates (PFs) o20 lm. Haptophytes, chlorophytes, cryptophytes and pigmented dinoflagellates were identified using fluorescent in situ hybridization or by standard 4 0 ,6-diamidino-2-phenylindole staining. Their fluctuations in abundance, cell size, biomass and bacterivory rates were measured through an annual cycle in an oligotrophic coastal system. On average, we were able to assign to these groups: 37% of the total pico-PFs and 65% of the nano-PFs composition. Chlorophytes were mostly picoplanktonic and they never ingested fluorescently labeled bacteria. About 50% of the PF o20 lm biomass was represented by mixotrophic algae. Pigmented dinoflagellates were the least abundant group with little impact on bacterioplankton. Cryptophytes were quantitatively important during the coldest periods and explained about 4% of total bacterivory. Haptophytes were the most important mixotrophic group: (i) they were mostly represented by cells 3-5 lm in size present year-round; (ii) cell-specific grazing rates were comparable to those of other bacterivorous non-photosynthetic organisms, regardless of the in situ nutrient availability conditions; (iii) these organisms could acquire a significant portion of their carbon by ingesting bacteria; and (iv) haptophytes explained on average 40% of the bacterivory exerted by MFs and were responsible for 9-27% of total bacterivory at this site. Our results, when considered alongside the widespread distribution of haptophytes in the ocean, indicate that they have a key role as bacterivores in marine ecosystems.

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Section: Pico-and Nanophytoplankton Compositionmentioning

confidence: 99%

Mixotrophic haptophytes are key bacterial grazers in oligotrophic coastal waters

et al. 2013

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“…7C). Taxonomical analysis using the available taxonomic literature (Hill 1992, Novarino et al 1994, Novarino 2003, 2005 suggested that the blooming species was Plagioselmis cf. prolonga Butcher ex G. Novarino, I.A.N.…”

Section: Plagioselmis Cf Prolonga Bloommentioning

confidence: 99%

“…The cryptophyte Plagioselmis cf. prolonga was identified using the standard literature for the identification of cryptophytes (Hill 1992, Novarino et al 1994, Novarino 2003, 2005.…”

Section: Sampling and Measurementsmentioning

confidence: 99%

“…The only reports to date were given by Andreoli et al (1986) and Bazin et al (2014), who investigated the red tides in the Po River delta (northern Adriatic Sea) and the Segura River estuary (western Mediterranean Sea), respectively. Cryptophytes that dominated these blooms were identified under light and electron microscope as the members of Plagioselmis (Butcher 1967), a common and widespread genus in the Mediterranean Sea (Novarino 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Nanoplanktonic cryptophyte flagellates (Phylum Cryptophyta, Class Cryptophyceae) are widely distributed in most aquatic habitats (Barlow and Kugrens 2002, Barone and Naselli-Flores 2003, Novarino 2005. Current taxonomy of the group recognizes more than 200 validly described species, mostly based on light and electron microscopical observations (Cerino and Zingone 2007).…”

Section: Introductionmentioning

confidence: 99%

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Cryptophyte bloom in a Mediterranean estuary: High abundance of <em>Plagioselmis</em> cf. <em>prolonga</em> in the Krka River estuary (eastern Adriatic Sea)

et al. 2014

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Summary:During the June 2010 survey of phytoplankton and physicochemical parameters in the Krka River estuary (eastern Adriatic Sea), a cryptophyte bloom was observed. High abundance of cryptophytes (maximum 7.9×10 6 cells l -1 ) and high concentrations of the class-specific biomarker pigment alloxanthine (maximum 2312 ng l -1 ) were detected in the surface layer and at the halocline in the lower reach of the estuary. Taxonomical analysis revealed that the blooming species was Plagioselmis cf. prolonga. Analysis of the environmental parameters in the estuary suggested that the bloom was supported by the slower river flow as well as the increased orthophosphate and ammonium concentrations. The first record of a cryptophyte bloom in the Krka River estuary may indicate that large-scale changes are taking place in the phytoplankton community. Such changes could have a major impact on the natural ecosystem dynamics and the mariculture production in the area.Keywords: estuarine ecosystem; phytoplankton bloom; cryptophytes; chemotaxonomy; Mediterranean Sea; Krka River estuary.Proliferación de una criptófita en un estuario mediterráneo: alta abundancia de Plagioselmis cf. prolonga en el estuario del río Krka (Adriático) Resumen: Se observó una proliferación de una criptófita durante el estudio del fitoplancton y de los parámetros fisicoquími-cos en el estuario del río Krka (Adriático) en junio de 2010. La abundancia más alta de criptofitas (máximo 7.9×10 6 células l -1 ) y las mayores concentraciones del pigmento marcador específico de la clase, la aloxantina (máximo 2312 ng l -1 ), fueron detectados en la capa superficial y en la haloclina en el tramo inferior de la ría. El análisis taxonómico reveló que la especie que proliferó fue Plagioselmis cf. prolonga. El análisis de los parámetros ambientales del estuario sugirió que la proliferación estaba favorecida por el caudal lento del río, así como el aumento de las concentraciones de ortofosfato y amonio. El hecho de registrar por primera vez una proliferación de una criptófita en el estuario del río Krka podría indicar cambios a gran escala en la comunidad de fitoplancton. Tales cambios podrían tener un impacto importante en la dinámica de los ecosistemas naturales y la producción de la maricultura en la zona.Palabras clave: estuario; proliferación de fitoplancton; criptófitas; quimiotaxonomía; mar Mediterráneo; estuario del río Krka.Citation/Como citar este artículo: Šupraha L., Bosak S.,

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Mixotrophic flagellate ingestion boosts microplastic accumulation in ascidians

et al. 2022

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Nanoplankton protists from the western Mediterranean Sea. II. Cryptomonads (Cryptophyceae = Crptomonadea)

Cited by 22 publications

References 48 publications

Mixotrophic haptophytes are key bacterial grazers in oligotrophic coastal waters

Mixotrophic haptophytes are key bacterial grazers in oligotrophic coastal waters

Cryptophyte bloom in a Mediterranean estuary: High abundance of <em>Plagioselmis</em> cf. <em>prolonga</em> in the Krka River estuary (eastern Adriatic Sea)

Mixotrophic flagellate ingestion boosts microplastic accumulation in ascidians

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