Picocyanobacteria in Adriatic transitional environments

Paoli, Alessandro; Celussi, Mauro; Valeri, Annalisa; Larato, Chiara; Bussani, Andrea; Umani, Serena Fonda; Vadrucci, Maria Rosaria; Mazziotti, Cristina; Negro, Paola Del

doi:10.1016/j.ecss.2007.02.026

Cited by 19 publications

(10 citation statements)

References 25 publications

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“…Extensive literature is available concerning picoplankton community distribution and dynamics in the Adriatic Sea (Aubry et al, 2006;Paoli et al, 2007;Pugnetti et al, 2008;Šolić et al, 2008;Vilibić & Šantić, 2008;Šantić et al, 2011, 2012a. However, information about picoeukaryotes is extremely scarce and only one study has been published to date concerning their distribution in the central Adriatic (Ninčević Gladan et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of picoplankton community from coastal waters to the open sea in the Central Adriatic

et al. 2013

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Flow cytometry was used to describe seasonal cycles of Prochlorococcus (Prochl), Synechococcus (Syn), picoeukaryotes and heterotrophic bacteria in the central Adriatic Sea along the trophic gradient from January to December 2010. All picoplankton parameters decreased from eutrophic to oligotrophic areas, while the biomass ratio of bacterial to autotrophic picoplankton showed an increase along the trophic gradient. Bacterial biomass ranged from 5.28 to 21.20 μg C l-1. Increased values were present during warmer seasons with the domination of low nucleic acid (LNA) group of bacteria. The high nucleic acid (HNA) bacterial group dominated during the winter and the spring. Bacterial production ranged from 0.09 -0.45 × 104 cells ml-1 h-1 .At coastal stations increased production was present during the winter and the spring and was more or less uniform at open sea stations. Biomasses of Syn and Prochl ranged from 0.16 to 11.47 µg C-1 l-1 and from 0.01 to 3.08 µg C l-1, respectively. They were elevated during the summer and the autumn at coastal stations and during the late winter at the open sea. Syn biomass always dominated over Prochl participating with 61.6-97.2% in biomass of cyanobacteria. Biomass of picoeukaryotes ranged from 1.21 to 21.85 µg C l-1 and was the highest during the winter. Their biomass notably prevailed in autotrophic picoplankton (APP) biomass over that of picocyanobacteria during the whole year. Autotrophic components (Prochl, Syn and picoeukaryotes) made greater contribution to the picoplankton biomass in mesotrophic and eutrophic areas, while heterotrophic bacteria became more important under oligotrophic conditions.

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Section: Introductionmentioning

confidence: 99%

Dynamics of picoplankton community from coastal waters to the open sea in the Central Adriatic

et al. 2013

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“…and the Cyanobium spp. dominate the phytoplankton (Uysal, 2001;Pere´z & Carrilo, 2005;Paoli et al, 2007). Regarding benthic cyanobacteria, the most frequently reported in European brackish waters are mainly Anabaena, Calothrix, Cyanothece, Nostoc, Oscillatoria and Phormidium (Edwards et al, 1992;Mez et al, 1997;Vasconcelos & Cerqueira, 2001; It is evident, therefore, that a wide diversity of cyanobacteria species can be found in brackishwater systems in Europe.…”

Section: Introductionmentioning

confidence: 99%

“…E-mail: vmvascon@ fc.up.pt Tan, 2007). The cyanobacteria of brackish waters (including estuaries), however, remain under-investigated, particularly in Europe, despite a number of significant contributions (Sivonen et al, 1989;Nehring, 1993;Lehtima¨ki et al, 1994Lehtima¨ki et al, , 1997Lehtima¨ki et al, , 2000Wille´n & Mattson, 1997;Sivonen & Jones, 1999;Sipia¨et al, 2001Sipia¨et al, , 2002Sipia¨et al, , 2006Sipia¨et al, , 2007Sipia¨et al, , 2008Vasconcelos & Cerqueira, 2001;Laamanen et al, 2002;Rocha et al, 2002;Geiss et al, 2003;Hobson & Fallowfield, 2003;Lehtonen et al, 2003;Stal et al, 2003;Sobrino et al, 2004;Herfindal et al, 2005;Kankaanpa¨a¨et al, 2005;Karjalainen et al, 2005Karjalainen et al, , 2007Karlsson et al, 2005;Pere´z & Carrilo, 2005;Surakka et al, 2005;Marino et al, 2006;Mazur-Marzec et al, 2007Paoli et al, 2007;Halinen et al, 2008;Ibelings & Havens, 2008;Jo´z´wiak et al, 2008;Lopes et al, 2010;Oftedal et al, 2010;). This lack of information for brackish-water cyanobacteria is especially significant in relation to the potential for production of new bioactive compounds.…”

Section: Introductionmentioning

confidence: 99%

“…This is a unique biotope, which comprises different environments very variable in terms of morphology, size and physical and chemical composition. Some of these distinct environments are highly contaminated, like other brackish-water systems around the world (Telesh, 2004;Segal et al, 2006;Paoli et al, 2007). The phytoplankton of the Baltic is dominated during summer by filamentous, bloom-forming cyanobacteria, in particular Nodularia, Anabaena and Aphanizomenon (Wille´n & Mattsson, 1997;Laamanen et al, 2002;Karjalainen et al, 2007;Palinska & Surosz, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Planktonic and benthic cyanobacteria of European brackish waters: a perspective on estuaries and brackish seas

Lopes

Vasconcelos

2011

European Journal of Phycology

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Cyanobacteria are photosynthetic organisms found in aquatic and terrestrial biotopes and ecosystems throughout the world. Marine and freshwater cyanobacteria have been extensively studied due to the toxic hazards that some of them create and biotechnological interest. In contrast, the cyanobacteria of brackish waters have been less studied despite being able to form toxic blooms like their freshwater and marine counterparts. We review the occurrence, diversity and toxicity of cyanobacteria species in the brackish waters of Europe, mainly estuaries and brackish environments of the Atlantic Ocean and the Mediterranean and Baltic Seas. The dominant cyanobacteria belong mainly to the planktonic genera Nodularia, Aphanizomenon, Microcystis and Anabaena, but also the benthic forms of Anabaena and Phormidium. Most genera from brackish waters are reported to be hepatotoxin producers (microcystin and nodularin). However, anatoxin-a and other bioactive compounds (e.g. apoptogens) can also be found and are produced exclusively by benthic forms. Nodularin is the best-characterized brackish-water cyanotoxin, being primarily produced by N. spumigena. Data are presented on cyanotoxin production, accumulation, and potential food chain transfer, with a particular focus on nodularin, which induces multiple effects on food-chain dynamics. Microcystins and anatoxin-a are also considered. Potential risks to animals and humans from cyanotoxin exposure are discussed, although reports of animal poisoning by brackish-water toxic cyanobacteria are scarce and no cases of human intoxication are yet known.

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“…They focused mainly on recent mercury contamination in the bottom sediments (Piani et al 2005, Covelli et al 2009). Biological studies have encompassed the distribution of picoplanktonic cyanobacteria (Paoli et al 2007), phytoplankton (Facca & Sfriso 2009), microphytobenthos (MPB) (Sdrigotti & Welker 2002, Blasutto et al 2005) and macroalgae (Falace et al 2009). Higher heterotrophic levels have also been considered (Sconfietti & Marchini 2001, Dondi et al 2003.…”

Section: Introductionmentioning

confidence: 99%

Benthic ecosystem functioning in hydrocarbon and heavy-metal contaminated sediments of an Adriatic lagoon

Cibic¹,

Franzo²,

Celussi³

et al. 2012

Mar. Ecol. Prog. Ser.

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Sediment samples were collected in 4 sites along a salinity gradient (between 0.2 and 27.3) of the Aussa River (Marano Lagoon, northern Adriatic Sea, Italy) and a decreasing gradient of industrial contamination downstream (from Stn A1 to Stn A4) to assess how a riverine-lagoonal system responds to chemical contamination by applying an integrative measure of its benthic ecological properties. Benthic biodiversity (primary producers, meiofauna, macrofauna) along with other structural and functional parameters were related to contamination. Meiofaunal abundance varied between 176 ± 65 and ~4000 ind. 10 cm −2 downstream. The macrofaunal composition shifted from one composed exclusively of chironomid larvae to a typically lagoonal one. At Stn A1, the benthic microalgal abundance exceeded 500 000 cells cm −3 and seemed unaffected by contamination. In the freshwater-impacted site, primary production was one order of magnitude higher than in the more saline one (7.20 and 0.60 µg C cm −3 h −1, respectively). High organic carbon enrichment (65 mg C g dry −1) at Stn A2 probably caused the highest community respiration, estimated by O 2 microprofiles, along with the highest exoenzymatic activities (β-glucosidase, leucine aminopeptidase and lipase). The 4 investigated sites were well separated by principal component analysis along a decreasing gradient of organic load. An extremely active microbial community in the contaminated site ensured high production and degradation rates. Correct assessment of the benthic ecosystem functioning in polluted areas may represent a useful tool for transitional system management in order to plan environmental interventions in a rational way.

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Picocyanobacteria in Adriatic transitional environments

Cited by 19 publications

References 25 publications

Dynamics of picoplankton community from coastal waters to the open sea in the Central Adriatic

Dynamics of picoplankton community from coastal waters to the open sea in the Central Adriatic

Planktonic and benthic cyanobacteria of European brackish waters: a perspective on estuaries and brackish seas

Benthic ecosystem functioning in hydrocarbon and heavy-metal contaminated sediments of an Adriatic lagoon

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