Involvement of microcystins, colony size and photosynthetic activity in the benthic recruitment of Microcystis

Feng, Bing; Wang, Chunbo; Wu, Xingqiang; Tian, Cuicui; Tian, Yingying; Xiao, Baihua

doi:10.1007/s10811-018-1508-0

Cited by 16 publications

(5 citation statements)

References 40 publications

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“…Multiple authors have hypothesized that mixing of the water column and sediment is an important driver for Microcystis bloom formation (Verspagen et al 2004;Misson and Latour 2012;Borges et al 2016;Feng et al 2019). The basis for this hypothesis is that mixing from wind or thermocline turnover is likely required to transfer vegetative overwintering cells from the sediment phase to the planktonic phase where the bloom would be observed.…”

Section: Littoral Mixing and Turnovermentioning

confidence: 99%

Identification and preventative treatment of overwintering cyanobacteria in sediments : a literature review

Calomeni¹,

McQueen²,

Kinley-Baird³

et al. 2022

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Freshwaters can experience growths of toxin-producing cyanobacteria or harmful algal blooms (HABs). HAB-producing cyanobacteria can develop akinetes, which are thick-enveloped quiescent cells akin to seeds in vascular plants or quiescent colonies that overwinter in sediment. Overwintering cells produce viable “seed beds” for HAB resurgences and preventative treatments may diminish HAB intensity. The purpose of this literature review was to identify (1) environmental factors triggering germination and growth of overwintering cells, (2) sampling, identification, and enumeration methods, and (3) feasibility of preventative algaecide treatments. Conditions triggering akinete germination (light ≥0.5 μmol m-2s-1, temperature 22-27℃) differ from conditions triggering overwintering Microcystis growth (temperature 15-30℃, nutrients, mixing). Corers or dredges are used to collect surficial (0-2 cm) sediment layers containing overwintering cells. Identification and enumeration via microscopy are aided by dilution, sieving, or density separation of sediment. Grow-out studies simulate environmental conditions triggering cell growth and provide evidence of overwintering cell viability. Lines of evidence supporting algaecide efficacy for preventative treatments include (1) field studies demonstrating scalability and efficacy of algaecides against benthic algae, (2) data suggesting similar sensitivities of overwintering and planktonic Microcystis cells to a peroxide algaecide, and (3) a mesocosm study demonstrating a decrease in HAB severity following preventative treatments. This review informs data needs, monitoring techniques, and potential efficacy of algaecides for preventative treatments of overwintering cells.

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Section: Littoral Mixing and Turnovermentioning

confidence: 99%

Identification and preventative treatment of overwintering cyanobacteria in sediments : a literature review

Calomeni¹,

McQueen²,

Kinley-Baird³

et al. 2022

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“…The sedimentation of microcystin-containing cells and colonies contributes to the biofilm pool. Through resuspension and migration, approximately 0.8-3% of colonies reinvade the water column (Feng et al 2019), moving microcystin from the sediment pool into the intercellular water column pool. The rate of microcystin resuspension and residence time in the water column is not well quantified but could be a cryptic pathway of human exposure when water column production is otherwise low.…”

Section: Sediment Fluxes and Fatesmentioning

confidence: 99%

Microcystin as a biogeochemical cycle: Pools, fluxes, and fates of the cyanotoxin in inland waters

Shingai

Wilkinson

2022

Limnol Oceanogr Letters

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There is a pressing need to understand the dynamics of microcystin, a toxin produced by some cyanobacteria, in the environment. Despite substantial advancements in our understanding of individual pools of microcystin, we lack a synthesized understanding of the sources, sinks, and movement of cyanotoxins within aquatic ecosystems. Using a literature synthesis approach, we developed a conceptual biogeochemical cycle of microcystin in lakes. We identified and synthesized the magnitude of four major pools of microcystin in lakes and reservoirs and nine major fluxes, including into the terrestrial environment (another major pool). Through this literature synthesis approach, we also identified understudied pools and fluxes. Adopting the framework of a "microcystin cycle" can provide new insights for the management and mitigation of microcystin exposure risks.

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“…In the late TGR drawdown period, the flow velocity in PX1 and PX2 was too high for phytoplankton survival, and the water depth of PX4 and PX5 was too deep for resting cells to receive light, so the cyanobacteria bloom broke out in PX3. [27] The differences in the communities and dominant species of phytoplankton in sediment and surface water are logical. The germination and migration of resting cells from sediment to the water column requires not only biomass in sediment but also suitable environmental conditions in the water column.…”

Section: The Factor Influencing Species In Surface Water During Algal Bloomsmentioning

confidence: 99%

“…Many factors have been found to affect the recruitment of the resting stages of phytoplankton: nutrient level [21][22][23], meteorological factors (temperature and radiation) [8,18,21,[23][24][25], hydrological and hydrodynamic conditions (depth of water, thermocline, the turbulence of sediment, etc.) [8,13,18,26], and biological factors (size of colonies, synthesis of microcystin, and interaction with other species) [22,23,[26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Variations in Phytoplankton Communities in Sediment and Surface Water as Reservoir Drawdown—A Case Study of Pengxi River in Three Gorges Reservoir, China

Ouyang

Yang

et al. 2021

Water

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The resting stages of phytoplankton are usually regarded as the seed bank and source of harmful algal blooms because of the recruitment of phytoplankton from sediment to the water column under suitable environmental conditions. Information about resting stages of phytoplankton is abundant in shallow lakes and littoral sea; yet, studies on river–reservoir systems are rare. The river–reservoir continuum shows a unique structuring of longitudinal gradients of hydrological and hydrodynamic conditions. We hypothesized that the seed bank and algal blooms in reservoirs are influenced by the hydrodynamic conditions of each reservoir. We used Illumina Miseq sequencing to examine the spatio-temporal variation in the phytoplankton community in the sediment as reservoir drawdown and in surface water during algal blooms in Pengxi River, a tributary of China’s Three Gorges Reservoir. The results show that the cyanobacteria community in sediment is significantly influenced by temperature, total carbon, maximum flow velocity, and total phosphorous, the eukaryotic phytoplankton community in sediment is significantly influenced by total phosphorous, temperature, total carbon, maximum flow velocity, and total nitrogen. Additionally, the dominant species in sediment is significantly different from that in surface water during algal blooms. Our results suggest that the dominant species in surface water during algal blooms is more influenced by the environmental factors and hydrodynamic conditions in the water column than the seeds in the sediment. These findings are fundamental for further research on the influence of hydrodynamic conditions on algal blooms in artificially regulated river-reservoir systems.

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Involvement of microcystins, colony size and photosynthetic activity in the benthic recruitment of Microcystis

Cited by 16 publications

References 40 publications

Identification and preventative treatment of overwintering cyanobacteria in sediments : a literature review

Identification and preventative treatment of overwintering cyanobacteria in sediments : a literature review

Microcystin as a biogeochemical cycle: Pools, fluxes, and fates of the cyanotoxin in inland waters

Spatio-Temporal Variations in Phytoplankton Communities in Sediment and Surface Water as Reservoir Drawdown—A Case Study of Pengxi River in Three Gorges Reservoir, China

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