Lost in the dark: estimation of the akinete pool for the recruitment of Nostocales populations (cyanobacteria) in a temperate deep lake

Ramm, Jessica; Rücker, Jacqueline; Knie, Matthias; Nixdorf, Brigitte

doi:10.1093/plankt/fbx010

Cited by 12 publications

(17 citation statements)

References 37 publications

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“…The Secchi depth in the lake is typically 2-3 m during the same period (Varadharajan, 2009). Light was sufficient for germination down 100 to 12 m in another lake with a similar average Secchi depth (Ramm et al, 2017), thus we assume light does not limit cyanobacteria germination down to a depth of at least 12 m when estimating the impact of bubbling on cyanobacteria recruitment.…”

Section: Upper Mystic Lake Field Site History 85mentioning

confidence: 99%

“…Bubble-mediated transport could be a significant mechanism of recruitment of cells to the surface waters especially in deep, stratified lakes like UML. Cyanobacteria are thought to largely be recruited to surface waters from shallow areas 385 due to a combination of higher light, temperature, and oxygen levels that promote germination, and increased wind-driven sediment resuspension (Ramm et al, 2017). While sediment cyanobacteria concentrations are higher in deeper areas of the https://doi.org/10.5194/bg-2019-243 Preprint.…”

Section: Implications For Cyanobacteria Transport and Possible Bloom mentioning

confidence: 99%

“…CC BY 4.0 License. lake, cells are not able to germinate because of the dark, anoxic conditions in deep, eutrophic lakes (Ramm et al, 2017).…”

Section: Implications For Cyanobacteria Transport and Possible Bloom mentioning

confidence: 99%

“…However, transport to surface waters of 35 contaminants mobilized from the sediment is affected by lake hydrodynamic conditions, notably stratification (Hicks et al, 1994). Likewise, over-wintering cyanobacteria and algae concentrated in the sediments are recruited to the surface through germination, wind-induced resuspension, or bioturbation (Ramm et al, 2017;Verspagen et al, 2004;Stahl-Delbanco and Hansson, 2002). In some cases, the number of resting cells in sediment can be predictive of the severity of subsequent bloom events (Anderson et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…(2005) showed that recruitment from sediments of the potentially toxic 40 cyanobacterium Microcystis was a major driver of the summer bloom (Verspagen et al, 2005). Cyanobacterial recruitment to surface waters from deep sediments is expected to be inhibited by stratification, low oxygen concentration, and low light levels (Ramm et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Vertical transport of sediment-associated metals and cyanobacteria by ebullition in a stratified lake

Delwiche¹,

Gu²,

Hemond³

et al. 2019

Preprint

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Abstract. Bubbles adsorb and transport particulate matter both in industrial and marine systems. While methane-containing bubbles emitted from anoxic sediments are found extensively in aquatic ecosystems, relatively little attention has been paid to the possibility that such bubbles transport particle-associated chemical or biological material from sediments to surface waters of freshwater lakes. We quantified transport of particulate material from sediments to the surface by bubbles in Upper Mystic Lake, MA and in a 15 m tall experimental column. Vertical particle transport was positively correlated with the volume of gas bubbles released from the sediment. Particles transported by bubbles originated almost entirely in the sediment, rather than being scavenged from the water column. Concentrations of arsenic, chromium, lead, and cyanobacterial cells in bubble-transported particulate material were similar to those of bulk sediment, and particles were transported from depths exceeding 15 m, resulting in daily fluxes as large as 0.005 µmol of arsenic m−2 and 4 × 104 cyanobacterial cells m−2 in the strongly stratified Upper Mystic Lake. While bubble-facilitated arsenic transport currently appears to be a modest component of total arsenic cycling in this lake, bubble-facilitated cyanobacterial transport could comprise as much as 17 % of recruitment in this lake and may thus be of particular importance in large, deep, stratified lakes.

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Section: Upper Mystic Lake Field Site History 85mentioning

confidence: 99%

Section: Implications For Cyanobacteria Transport and Possible Bloom mentioning

confidence: 99%

“…CC BY 4.0 License. lake, cells are not able to germinate because of the dark, anoxic conditions in deep, eutrophic lakes (Ramm et al, 2017).…”

Section: Implications For Cyanobacteria Transport and Possible Bloom mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vertical transport of sediment-associated metals and cyanobacteria by ebullition in a stratified lake

Delwiche¹,

Gu²,

Hemond³

et al. 2019

Preprint

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Identification of cyanobacteria overwintering cells and environmental conditions causing growth: Application for preventative management

Calomeni‐Eck,

McQueen,

Kinley‐Baird

et al. 2024

Ecol Sol and Evidence

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Harmful algal blooms (HABs) formed by freshwater cyanobacteria pose risks to human and ecological health globally. Some cyanobacteria form overwintering cells that remain in the sediment during non‐ideal growth conditions and provide an inoculum for HABs during the growing season, perpetuating the cyanobacterial life cycle. Preventative management targeted at decreasing the viability of overwintering cells is an attractive strategy for limiting HAB formation and decreasing risks. However, this approach is novel, and information is needed for sampling, identification and enumeration of overwintering cells in sediments as well as methods for determining if overwintering cells have the potential to contribute to HAB formation. Peer reviewed literature related to these topics are available; yet these data need to be synthesized and placed into the context of management. Therefore, a strategic review was conducted to inform methods and data needs for this preventative strategy. To sample overwintering cells, corers or dredges are used to collect surficial (0–2 cm) sediment layers containing overwintering cells. Identification and enumeration of overwintering cells via light microscopy are aided by dilution, sieving, or density separation of cells from sediment. Incubation studies which simulate environmental conditions triggering akinete germination and cell growth provide evidence of overwintering cell viability. Critical environmental conditions are light (≥0.5 μmol m−2 s−1) and temperature (20–30°C) for triggering akinete germination and growth of quiescent vegetative Microcystis sp. cells, respectively. Limited information was available on the roles of mixing and dissolved oxygen as environmental conditions for germination and growth. Synthesized information can be used to identify potential areas of concern in which overwintering cells are contributing to HABs. Additionally, this information can be used to design incubation studies in which field collected sediments containing overwintering cells are placed in ideal environmental conditions for germination and growth and cyanobacteria transferring to the water column are measured over time. These data inform investigations of areas that are candidates for preventative management and measurements of overwintering cell responses to management.

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Dormant Cells (Akinetes) of Filamentous Cyanobacteria Demonstrate a Great Variability in Morphology, Physiology, and Ecological Function

2019

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Lost in the dark: estimation of the akinete pool for the recruitment of Nostocales populations (cyanobacteria) in a temperate deep lake

Cited by 12 publications

References 37 publications

Vertical transport of sediment-associated metals and cyanobacteria by ebullition in a stratified lake

Vertical transport of sediment-associated metals and cyanobacteria by ebullition in a stratified lake

Identification of cyanobacteria overwintering cells and environmental conditions causing growth: Application for preventative management

Dormant Cells (Akinetes) of Filamentous Cyanobacteria Demonstrate a Great Variability in Morphology, Physiology, and Ecological Function

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