<i>Gonyostomum semen</i>(Ehr.) Diesing bloom formation in nine lakes of Polesie region (Central–Eastern Poland)

Pęczuła, Wojciech; Poniewozik, Małgorzata; Szczurowska, Agnieszka

doi:10.1051/limn/2013059

Cited by 8 publications

(6 citation statements)

References 33 publications

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“…Nevertheless, G. semen can occasionally be found in extremely high densities. A few studies from countries situated south of Scandinavia reported one order of magnitude higher maximum biomass of the alga which ranged 143-841 g fresh biomass m À3 (Pithart et al, 1997;Hehmann et al, 2001;Pęczuła et al, 2013;Karosiene et al, 2014) and which more or less correspond to densities used in our experiments. Gonyostomum density, even during blooms, in lakes of non-Scandinavian part of Europe is usually not higher than 50 mg FW L À1 (Le Cohu et al, 1989;Vetrova and Okhapkin, 1990;Negro et al, 2000;Hutorowicz et al, 2006;Pęczuła, 2013;Karosiene et al, 2014); therefore, the previously noted extremely high and incidental biomass values may be an exception rather than the rule.…”

Section: Discussionsupporting

confidence: 54%

An experimental study on the influence of the bloom-forming alga Gonyostomum semen (Raphidophyceae) on cladoceran species Daphnia magna

Pęczuła

Toporowska

Pawlik‐Skowrońska

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-The effect of the unicellular, bloom-forming alga Gonyostomum semen (Raphidiophyceae) on the survival rate and body size of Daphnia magna was tested under experimental laboratory conditions. Using samples from four humic lakes with a long history of Gonyostomum blooms, we exposed D. magna for 72 h to various Gonyostomum treatments which included homogenized biomass (frozen and fresh), live cell populations as well as lake water separated from the concentrated biomass of live cells. Filtered lake water and the chlorophycean alga Stichococcus bacillaris population (homogenized biomass or live cells) we used as controls. Our study revealed that (1) frozen homogenized G. semen biomass in the concentrations typical for blooms was not harmful for Daphnia and appeared to have a nutritive effect because it supported its growth; however, Daphnia mortality occurred after exposure to fresh and highly concentrated cell homogenate containing high amount of mucilage; (2) it is unlikely that living Gonyostomum cells excrete extracellular substances harmful for Daphnia; however, dense live Gonyostomum population that formed mucilaginous aggregates immobilized Daphnia and increased its mortality. The results suggest that various interactions between G. semen and D. magna take place and may play an essential role in natural freshwater ecosystems.Keywords: algal blooms / mucilage / crustaceans / toxicity Résumé -Une étude expérimentale de l'influence de l'algue formant des efflorescences Gonyostomum semen (Raphidophyceae) sur l'espèce de cladocère Daphnia magna. L'effet de l'algue unicellulaire, formant des efflorescences, Gonyostomum semen (Raphidiophyceae) sur le taux de survie et la taille corporelle de Daphnia magna a été testé dans des conditions expérimentales de laboratoire. En utilisant des échantillons de quatre lacs humiques avec un long passé d'efflorescences de Gonyostomum, nous avons exposé D. magna pendant 72 h à différents traitements de Gonyostomum qui incluent : la biomasse homogénéisée (congelée et fraîche), des populations de cellules vivantes ainsi que l'eau du lac séparée de la biomasse concentrée de cellules vivantes. L'eau filtrée du lac et une population d'algues chlorophycées Stichococcus bacillaris (biomasse homogénéisée ou cellules vivantes) ont été utilisées comme témoins. Notre étude a révélé que : (1) la biomasse congelée homogénéisée de G. semen dans les concentrations typiques d'efflorescences n'était pas nocif pour Daphnia et semblait avoir un effet nutritif car elle a soutenu sa croissance, cependant, la mortalité de Daphnia a eu lieu après une exposition à un homogénat frais et hautement concentré de cellules contenant une grande quantité de mucilage ; (2) il est peu probable que les cellules vivantes de Gonyostomum excrètent des substances extracellulaires nocives pour Daphnia, cependant, une population vivante dense de Gonyostomum vivante qui a formé des agrégats mucilagineux a immobilisé Daphnia et a augmenté sa mortalité. Les résultats suggèrent que diverses interactions entre G. se...

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Section: Discussionsupporting

confidence: 54%

An experimental study on the influence of the bloom-forming alga Gonyostomum semen (Raphidophyceae) on cladoceran species Daphnia magna

Pęczuła

Toporowska

Pawlik‐Skowrońska

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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“…In other studied lakes, G. semen distribution in the vertical profile was: reversed (decreased biomass with increasing depth in Suchar II), nonlinear (the density peak in the metalimnion in Wądołek) or the algae population was very sparse or virtually absent (Widne). All studied lakes had common morphometric and chemical characteristics, which are known to support Gonyostomum high biomass development: small surface area with high relative depth which enables sharp thermal stratification to develop, slightly acidic or circumneutral pH, low level of calcium, moderate/high humic and phosphorus content (Rosén, 1981;Lepistö et al, 1994;Reynolds et al, 2002;Rengefors et al, 2012;Pęczuła, 2013;Pęczuła et al, 2013;Karosiene et al, 2014). The similarity of water quality parameters in studied lakes (both among them and within their water columns) taken together with diverse patterns of G. semen vertical distribution, points to a zooplankton as a potential factor influencing this diversity.…”

Section: Discussionmentioning

confidence: 99%

“…Although several studies showed that G. semen tends to be unevenly distributed in the vertical column of water and can change its vertical location (Cowles and Brambel, 1936;Cronberg et al, 1988;Le Cohu et al, 1989, Eloranta andRäike, 1995;Pithart et al, 1997;Negro et al, 2000;Salonen and Rosenberg, 2000;Górniak, 2004, Pęczuła et al, 2013), there is no general agreement about the causes and mechanisms of the phenomenon. Some studies (Cronberg et al, 1988;Salonen and Rosenberg, 2000) pointed the importance of epilimnetic phosphorus depletion as a driver of the algae behavior; Eloranta and Räike (1995) stated that G. semen diel migrations are particularly related to the species light avoidance, while Pęczuła et al (2013) suggested that the role of zooplankton grazers may be crucial as well. Trophic relations between G. semen and zooplankton species have been studied recently, mainly testing the algae as a food source, sometimes with contradictory results (Williamson et al, 1996;Lebret et al, 2012;Johansson et al, 2013;Björnerås, 2014).…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of expansive, bloom-forming algaeGonyostomum semenvs.plankton community and water chemistry in four small humic lakes

Pęczuła

Grabowska

Zieliński

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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One of the features of Gonyostomum semen, a bloom-forming and expansive flagellate, is uneven distribution in the vertical water column often observed in humic lakes. In this paper, we analysed vertical distribution of the algae in four small (0.9–2.5 ha) and humic (DOC: 7.4–16.5 mg dm−3) lakes with similar morphometric features with the aim to test the hypothesis that vertical distribution of G. semen may be shaped by zooplankton structure and abundance. In addition, we wanted to check whether high biomass of this flagellate has any influence on the chemical composition as well as on planktonic bacteria abundance of the water column. The results of the study showed that vertical distribution of the algae during the day varied among all studied lakes. Our most important finding was that (a) the abundance and structure of zooplankton community (especially in case of large bodied daphnids Daphnia pulicaria, D. longispina and copepod Eudiaptomus graciloides) may shape G. semen vertical distribution in studied lakes; (b) high G. semen biomass may decrease the content of ammonium ions in the water column by intense uptake, but has low effect on other water chemical parameters. The results of the study contribute to the understanding of the factors influencing this expansive algae behaviour as well as it shows interesting aspects of G. semen influence on some components of the lake ecosystem.

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“…Taxonomy of aquatic strains was previously reported ( Logares et al, 2009 ; Rengefors et al, 2012 ; Pȩczuła et al, 2013 ; Lebret et al, 2015 ; Johansson et al, 2016 ; Karosienë et al, 2016 ) or obtained through personal communication. We identified the 81 isolated strains of airborne microalgae.…”

Section: Methodsmentioning

confidence: 99%

Ice Nucleation Activity and Aeolian Dispersal Success in Airborne and Aquatic Microalgae

Tesson¹,

Šantl-Temkiv²

2018

Front. Microbiol.

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Microalgae are common members of the atmospheric microbial assemblages. Diverse airborne microorganisms are known to produce ice nucleation active (INA) compounds, which catalyze cloud and rain formation, and thus alter cloud properties and their own deposition patterns. While the role of INA bacteria and fungi in atmospheric processes receives considerable attention, the numerical abundance and the capacity for ice nucleation in atmospheric microalgae are understudied. We isolated 81 strains of airborne microalgae from snow samples and determined their taxonomy by sequencing their ITS markers, 18S rRNA genes or 23S rRNA genes. We studied ice nucleation activity of airborne isolates, using droplet freezing assays, and their ability to withstand freezing. For comparison, we investigated 32 strains of microalgae from a culture collection, which were isolated from polar and temperate aqueous habitats. We show that ∼17% of airborne isolates, which belonged to taxa Trebouxiphyceae, Chlorophyceae and Stramenopiles, were INA. A large fraction of INA strains (over 40%) had ice nucleation activity at temperatures ≥-6°C. We found that 50% of aquatic microalgae were INA, but the majority were active at temperatures <-12°C. Most INA compounds produced by microalgae were proteinaceous and associated with the cells. While there were no deleterious effects of freezing on the viability of airborne microalgae, some of the aquatic strains were killed by freezing. In addition, the effect of desiccation was investigated for the aquatic strains and was found to constitute a limiting factor for their atmospheric dispersal. In conclusion, airborne microalgae possess adaptations to atmospheric dispersal, in contrast to microalgae isolated from aquatic habitats. We found that widespread taxa of both airborne and aquatic microalgae were INA at warm, sub-zero temperatures (>-15°C) and may thus participate in cloud and precipitation formation.

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Gonyostomum semen(Ehr.) Diesing bloom formation in nine lakes of Polesie region (Central–Eastern Poland)

Cited by 8 publications

References 33 publications

An experimental study on the influence of the bloom-forming alga Gonyostomum semen (Raphidophyceae) on cladoceran species Daphnia magna

An experimental study on the influence of the bloom-forming alga Gonyostomum semen (Raphidophyceae) on cladoceran species Daphnia magna

Vertical distribution of expansive, bloom-forming algaeGonyostomum semenvs.plankton community and water chemistry in four small humic lakes

Ice Nucleation Activity and Aeolian Dispersal Success in Airborne and Aquatic Microalgae

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