Physicochemical Parameters’ Effects on the Freshwater Cyanobacterium Microcystis Sp. and Their Toxins DOI Creative Commons
Hichèm Nasri,

Loubna Ghodbane,

Amina Amrani

et al.

IntechOpen eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Microcystis sp. are ubiquitous and highly prevalent Cyanobacteria found in freshwater ecosystems. They known for episodic, large-scale proliferations as “blooms”, which driven by factors such elevated nitrogen phosphorus concentrations, enhanced water column stability, increased temperatures. infamous producing a class of potent hepatotoxins “microcystins (MCs)”, exert their toxicity primarily through the inhibition serine/threonine protein phosphatases 1 (PP1) 2A (PP2A). This disrupts cellular signal transduction pathways affects numerous processes preventing dephosphorylation proteins. As result, there is significant disruption cytoskeleton, altered signaling, and, ultimately, cell apoptosis. Additionally, microcystins interfere with antioxidant defense mechanisms, causing oxidative stress generating reactive oxygen species (ROS). can lead to damage across various organs tissues, including liver, particularly susceptible microcystin toxicity. chapter provides comprehensive overview how physicochemical parameters influence proliferation production microcystins. It explores intricate relationship between environmental biosynthesis these toxins, thereby elucidating conditions that intensified production.

Language: Английский

Fate of a toxic Microcystis aeruginosa bloom introduced into a subtropical estuary from a flow-managed canal and management implications DOI Creative Commons
Edward J. Phli̇ps,

Susan Badylak,

Eric C. Milbrandt

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124362 - 124362

Published: Feb. 1, 2025

The Caloosahatchee Estuary in southwest Florida, USA, is regularly subject to the introduction of toxic Microcystis aeruginosa blooms, often originating from eutrophic Lake Okeechobee via C-43 Canal. focus this study was determine responses one these introduced blooms progressively elevated salinity levels as bloom water mass moved through estuary. In upper estuary, salinities were freshwater, and surface large colonies M. observed, along with peak microcystin toxin concentrations up 107 μg L-1, all particulate fraction. mid-estuary, increased 2-6, again 259 however, significant extracellular also observed (i.e., 17.8 L-1), suggesting a level osmotic stress on aeruginosa. lower ranged 6 25 very few viable but 0.5 L-1) present throughout column. It noteworthy that average total column + extracellular) remained constant movement during its transit revealing negligible rate degradation ten-day transit. results provide insights into changes distribution gradient, which has implications for management risks ecosystem human health, how may be affected by releases three control structures Discharge rates play major roles Canal-Caloosahatchee ecosystem. potential discharge regulation are discussed perspectives allochthonous autochthonous origin.

Language: Английский

Citations

2
Multivariate analysis of water quality of Sacramento-San Joaquin Delta DOI Creative Commons
Rahul Kumar, Prachi Pandey, Aditya Pandey

et al.

Discover Water, Journal Year: 2025, Volume and Issue: 5(1)

Published: April 15, 2025

Language: Английский

Citations

0
Dual nitrogen and phosphorus reductions are needed for long-term mitigation of eutrophication and harmful cyanobacterial blooms in the hydrologically-variable San Francisco Bay Delta, CA DOI
Hans W. Paerl, Haley Plaas, Leah Nelson

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 957, P. 177499 - 177499

Published: Nov. 15, 2024

Language: Английский

Citations

2
Physicochemical Parameters’ Effects on the Freshwater Cyanobacterium Microcystis Sp. and Their Toxins DOI Creative Commons
Hichèm Nasri,

Loubna Ghodbane,

Amina Amrani

et al.

IntechOpen eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Microcystis sp. are ubiquitous and highly prevalent Cyanobacteria found in freshwater ecosystems. They known for episodic, large-scale proliferations as “blooms”, which driven by factors such elevated nitrogen phosphorus concentrations, enhanced water column stability, increased temperatures. infamous producing a class of potent hepatotoxins “microcystins (MCs)”, exert their toxicity primarily through the inhibition serine/threonine protein phosphatases 1 (PP1) 2A (PP2A). This disrupts cellular signal transduction pathways affects numerous processes preventing dephosphorylation proteins. As result, there is significant disruption cytoskeleton, altered signaling, and, ultimately, cell apoptosis. Additionally, microcystins interfere with antioxidant defense mechanisms, causing oxidative stress generating reactive oxygen species (ROS). can lead to damage across various organs tissues, including liver, particularly susceptible microcystin toxicity. chapter provides comprehensive overview how physicochemical parameters influence proliferation production microcystins. It explores intricate relationship between environmental biosynthesis these toxins, thereby elucidating conditions that intensified production.

Language: Английский

Citations

0