Potential toxicity of the freshwater Chrysochromulina species C. parva (Prymnesiophyceae)

Hansen, Lone Reersø; Kristiansen, Jørgen; Rasmussen, Jørn Vistisen

doi:10.1007/bf00010731

Cited by 19 publications

(12 citation statements)

References 4 publications

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“…A freshwater fish mortality event in Denmark coincided with a bloom of C. parva (up to 6.14 × 10 5 cells/ml), and there was no evidence for low dissolved oxygen or other potential environmental stressors. Although Downloaded by [McGill University Library] at 17:34 04 October 2012 toxicity tests were not conducted, this species is highly suspect and, if proven to be toxic, would represent the first report of toxicity in a freshwater Chrysochromulina species (Hansen et al, 1994). In April-May 1992, a mortality of caged rainbow trout, Oncorhynchus mykiss, was associated with a mixed bloom of Chrysochromulina spp.…”

Section: A Chrysochromulina Sppmentioning

confidence: 98%

The Effects of Harmful Algal Blooms on Aquatic Organisms

Landsberg

2002

Reviews in Fisheries Science

1,133

807

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Section: A Chrysochromulina Sppmentioning

confidence: 98%

The Effects of Harmful Algal Blooms on Aquatic Organisms

Landsberg

2002

Reviews in Fisheries Science

1,133

807

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“…Three clones were highly similar with Chrysochromulina (Medlin et al, 2008). This species may establish mass developments in freshwaters and are potentially toxic (Hansen et al, 1994). Quite a number of chrysoflagellates were discovered under the microscope but remained unidentified in the clone library.…”

Section: Mastigodiaptomus Nesusay339156mentioning

confidence: 98%

Molecular and microscopic diversity of planktonic eukaryotes in the oligotrophic Lake Stechlin (Germany)

Luo

Böck

et al. 2010

Hydrobiologia

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The aim of this study was to compare a molecular and a microscopic approach to study the planktonic eukaryotic diversity of an oligotrophic lake. Plankton samples from the temperate Lake Stechlin were assessed in winter and summer 2008 by comparison of 18S rRNA gene clone libraries to light microscopic evaluations. For both approaches identical samples were used. There were remarkable differences between the main groups recovered by the contrasting methods. The microscopic analyses showed predominance of autotrophic planktonic organisms, whereas most of them could not be discovered by the molecular method which resulted in a higher diversity of heterotrophic flagellates. The microscopic survey revealed high diversity of Chlorophyta and Cryptophyta as well as the Stramenopiles groups of Bacillariophyceae and Chrysophyceae. The clone libraries, based on full-length 18S rRNA gene sequences, displayed highest diversity of Alveolata belonging to seven different subclades. Notably, Antarctic Dinophyta-related clones were detected. The occurrence of the marine phagotrophic flagellate Telonema was also documented. Comparing the two sampling seasons, rich diversity suggests that flagellates played an important role in late winter (February), however, there is relatively low diversity in summer (August). The newly discovered molecular diversity of planktonic eukaryotes in Stechlin will help to understand the biodiversity patterns in freshwater lakes.

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“…Although Haptophyta are well known in marine systems (Moon-van der Staay et al, 2000; Iglesias-Rodriguez et al, 2002), especially because of their ability to form toxic blooms (Gjøsaeter et al, 2000;Baker et al, 2007), only a dozen Haptophyta species have been previously described from freshwater or terrestrial habitats (John et al, 2002). However, some haptophyte blooms have been previously recorded in different lacustrine systems (Nicholls et al, 1982;Hansen et al, 1994), suggesting an importance of this group in other freshwater ecosystems. Vertical structure of small eukaryotes C Lepère et al CCA plots revealed an opposite distribution between Chlorophyta and Haptophyta groups (Figure 4).…”

mentioning

confidence: 96%

Vertical structure of small eukaryotes in three lakes that differ by their trophic status: a quantitative approach

et al. 2010

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In lakes, the diversity of eukaryotic picoplankton has been recently studied by the analysis of 18S ribosomal RNA gene sequences; however, quantitative data are rare. In this study, the vertical structure and abundance of the small eukaryotic size fraction (0.2-5 lm) were investigated in three lakes by tyramide signal amplification-fluorescent in situ hybridization targeting six phylogenetic groups: Chlorophyta, Haptophyta, Cercozoa, LKM11, Perkinsozoa and fungi. The groups targeted in this study are found in all lakes; however, both the abundance and structure of small eukaryotes are dependent on the system's productivity and depth. These data highlighted the presence of Chlorophyta contributing on an average to 19.3%, 14.7% and 41.2% of total small eukaryotes in lakes Bourget, Aydat and Pavin, respectively. This study also revealed the unexpected importance of Haptophyta, reaching 62.8% of eukaryotes in the euphotic zone of Lake Bourget. The high proportions of these pigmented cells highlight the underestimation of these groups by PCR-based methods. The presence of pigmented Chlorophyta in the deepest zones of the lakes suggests a mixotrophic behaviour of these taxa. We also confirmed the presence of putative parasites such as Perkinsozoa (5.1% of small eukaryotes in Lake Pavin and Bourget) and, with lower abundances, fungi (targeted by the MY1574 probe). Cells targeted by LKM11 probes represented the second group of abundance within heterotrophs. Open questions regarding the functional roles of the targeted groups arise from this study, especially regarding parasitism and mixotrophy, which are interactions poorly taken into account in planktonic food web models.

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Potential toxicity of the freshwater Chrysochromulina species C. parva (Prymnesiophyceae)

Cited by 19 publications

References 4 publications

The Effects of Harmful Algal Blooms on Aquatic Organisms

The Effects of Harmful Algal Blooms on Aquatic Organisms

Molecular and microscopic diversity of planktonic eukaryotes in the oligotrophic Lake Stechlin (Germany)

Vertical structure of small eukaryotes in three lakes that differ by their trophic status: a quantitative approach

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