Can toxin warfare against fungal parasitism influence short-term Dolichospermum bloom dynamics? – A field observation

Weisbrod, Barbara; Riehle, Eva; Helmer, Michelle; Martin‐Creuzburg, Dominik; Dietrich, Daniel R.

doi:10.1016/j.hal.2020.101915

Cited by 7 publications

(6 citation statements)

References 60 publications

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“…Strain-level variability also occurs for morphotypes of Dolichospermum (Weisbrod et al, 2020) and chemotypes of Planktothrix (Sønstebø and Rohrlack, 2011). Thus, the strain composition of Microcystis blooms may be influenced by fungal parasites.…”

Section: Fungal Parasitesmentioning

confidence: 99%

“…While only limited documentation of chytrid infection of Microcystis is available (Sen, 1988), different strains of Microcystis appear to have varying degrees of susceptibility (Van Wichelen et al ., 2010). Strain‐level variability also occurs for morphotypes of Dolichospermum (Weisbrod et al ., 2020) and chemotypes of Planktothrix (Sønstebø and Rohrlack, 2011). Thus, the strain composition of Microcystis blooms may be influenced by fungal parasites.…”

Section: Community Interactionsmentioning

confidence: 99%

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The genetic and ecophysiological diversity of Microcystis

Dick

Duhaime

Evans

et al. 2021

Environmental Microbiology

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Section: Fungal Parasitesmentioning

confidence: 99%

Section: Community Interactionsmentioning

confidence: 99%

The genetic and ecophysiological diversity of Microcystis

Dick

Duhaime

Evans

et al. 2021

Environmental Microbiology

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“…Toxins were extracted from filters using a methanolic extraction method and were, subsequently, analyzed via UPLC–MS/MS [ 24 , 65 ]. Briefly, 3 mL 50% ( v/v ) aqueous methanol was added to each filter and soaked for 30 min at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Concentrations of different MCs were measured via UPLC–MS/MS, with an internal standard containing deuterated MC-LR and MC-LF (D 5 -MC-LF and D 7 -MC-LR) [ 24 , 65 , 87 ]. Three different MCs, MC-RR, MC-YR and MC-LR were used as external standards for analysis, with final concentrations of 2, 10 and 100 ng/mL.…”

Section: Methodsmentioning

confidence: 99%

“…Despite a plethora of efforts, neither the trigger for toxin production, nor the factors resulting in the development of toxic cyanobacterial blooms, have been elucidated. While toxins are suggested to be part of a defense mechanism against zooplankton or parasites [ 22 , 23 , 24 ], and toxin producing strains seem to have an advantage over non-toxic strains [ 25 , 26 ], the molecular ‘switch’ that turns toxin production on has not yet been discovered. Irrespective of the latter, the potential adverse impact of toxic cyanobacterial blooms on human health, society, economy and ecology highlights the importance of an improved understanding of cyanobacterial bloom formation, with or without concomitant toxin production [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

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Is Toxin-Producing Planktothrix sp. an Emerging Species in Lake Constance?

Fournier

Riehle

Dietrich

et al. 2021

Toxins

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Recurring blooms of filamentous, red-pigmented and toxin-producing cyanobacteria Planktothrix rubescens have been reported in numerous deep and stratified prealpine lakes, with the exception of Lake Constance. In a 2019 and 2020 Lake Constance field campaign, we collected samples from a distinct red-pigmented biomass maximum below the chlorophyll-a maximum, which was determined using fluorescence probe measurements at depths between 18 and 20 m. Here, we report the characterization of these deep water red pigment maxima (DRM) as cyanobacterial blooms. Using 16S rRNA gene-amplicon sequencing, we found evidence that the blooms were, indeed, contributed by Planktothrix spp., although phycoerythrin-rich Synechococcus taxa constituted most of the biomass (>96% relative read abundance) of the cyanobacterial DRM community. Through UPLC–MS/MS, we also detected toxic microcystins (MCs) in the DRM in the individual sampling days at concentrations of ≤1.5 ng/L. Subsequently, we reevaluated the fluorescence probe measurements collected over the past decade and found that, in the summer, DRM have been present in Lake Constance, at least since 2009. Our study highlights the need for a continuous monitoring program also targeting the cyanobacterial DRM in Lake Constance, and for future studies on the competition of the different cyanobacterial taxa. Future studies will address the potential community composition changes in response to the climate change driven physiochemical and biological parameters of the lake.

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Cyanobacterial community succession and associated cyanotoxin production in hypereutrophic and eutrophic freshwaters

Tanvir

Zhang

et al. 2021

Environmental Pollution

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Can toxin warfare against fungal parasitism influence short-term Dolichospermum bloom dynamics? – A field observation

Cited by 7 publications

References 60 publications

The genetic and ecophysiological diversity of Microcystis

The genetic and ecophysiological diversity of Microcystis

Is Toxin-Producing Planktothrix sp. an Emerging Species in Lake Constance?

Cyanobacterial community succession and associated cyanotoxin production in hypereutrophic and eutrophic freshwaters

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