Ciliate grazing on the bloom-forming microalga Gonyostomum semen

SND-ID: 2024-398. Version: 1. DOI: https://doi.org/10.57804/bzkb-3987

Citation

Creator/Principal investigator(s)

Ingrid Sassenhagen - Uppsala University, Department of Ecology and Genetics, Limnology orcid

Research principal

Uppsala University rorId

Description

Cell count data set from infection experiment containing 8 columns, which are described below.
Day: Day of the experiment.
Date: Date of the experiment.
Code: Unique identifier for each combination of G. semen and ciliate strains.
G.semen_strain: Identifier for the G. semen strain used in this treatment.
Ciliate_strain: Identifier for the ciliate strain used in this treatment. G. semen mono-cultures (without ciliates) are named "control".
Treatment: Distinguishes control and grazing (with ciliates) treaments.
Count: Specifies which taxon was counted (G. semen or ciliate).
cells/ml: Cell concentration counted under an inverted microscope in cells/mL.

... Show more..
Cell count data set from infection experiment containing 8 columns, which are described below.
Day: Day of the experiment.
Date: Date of the experiment.
Code: Unique identifier for each combination of G. semen and ciliate strains.
G.semen_strain: Identifier for the G. semen strain used in this treatment.
Ciliate_strain: Identifier for the ciliate strain used in this treatment. G. semen mono-cultures (without ciliates) are named "control".
Treatment: Distinguishes control and grazing (with ciliates) treaments.
Count: Specifies which taxon was counted (G. semen or ciliate).
cells/ml: Cell concentration counted under an inverted microscope in cells/mL.

The freshwater raphidophyte Gonyostomum semen forms extensive summer blooms in northern European humic lakes. The development of these blooms might be facilitated by a lack of natural top-down control, as few zooplankton species are able to prey on these large algal cells (up to 100µm) that expel trichocysts upon physical stress. In this study, we describe a small ciliate species (<17µm) that preys on G. semen by damaging the cell membrane until cytoplasm and organelles spill out. Sequencing of clonal cultures of the ciliate tentatively identified it as the prostomatid species Urotricha pseudofurcata. Grazing experiments illustrated that feeding by U. cf. pseudofurcata can significantly reduce cell concentrations of the microalga. However, differences in cell size and growth rate between two investigated ciliate strains resulted in noticeably different grazing pressure. Environmental sequencing data from five different lakes supported potential interactions between the two species. Urotricha cf. pseudofurcata might, thus, play an important role in aquatic ecosystems that are regularly dominated by G. semen, reducing the abundance of this bloom-forming microalga and enabling transfer of organic carbon to higher trophic levels.

The dataset was originally published in DiVA and moved to SND in 2024. Show less..

Data contains personal data

No

Language

Method and outcome
Data collection
Geographic coverage
Administrative information

Contributor(s)

Eva Lindström

Funding

  • Funding agency: Olle Engkvists stiftelse
  • Funding agency's reference number: 146-300-188

Identifiers

Topic and keywords

Research area

Environmental sciences (Standard för svensk indelning av forskningsämnen 2011)

Oceanography, hydrology and water resources (Standard för svensk indelning av forskningsämnen 2011)

Microbiology (Standard för svensk indelning av forskningsämnen 2011)

Ecology (Standard för svensk indelning av forskningsämnen 2011)

Publications
Published: 2023-09-07
Last updated: 2024-06-20