bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown
Published: Aug. 28, 2023
For
Language: Английский
The Journal of Microbiology, Journal Year: 2024, Volume and Issue: 62(3), P. 249 - 260
Published: March 1, 2024
Language: Английский
Citations
8
Ecosphere, Journal Year: 2025, Volume and Issue: 16(2)
Published: Feb. 1, 2025
Abstract Lake water level fluctuations are an important factor driving variation in many ecosystem processes. The nearshore sediments that periodically exposed and re‐inundated can develop distinct physical chemical characteristics, especially relationship to the organic matter content of particle size distribution. These sediment characteristics turn alter flux nitrogen (N) phosphorus (P) from into column when inundated. Here, we used intact core experiments across a range inundation frequencies estimate effect frequency on nutrient Kabetogama Lake, Minnesota, USA. We observed associations between elevation or some but structural equation model, properties measured were poorly related inorganic flux. On other hand, did have moderate association with N P sediments, which could be due decay terrestrial accumulates sediments. our parameterized model how three different management regimes employed over past 50 years influence models suggested more recent reduced by 9%–13% 5.9%–9.8%, respectively. Nearshore sustain harmful algal blooms occur this lake, these fluxes influenced management.
Language: Английский
Citations
0
Journal of Agriculture and Food Research, Journal Year: 2025, Volume and Issue: unknown, P. 101753 - 101753
Published: Feb. 1, 2025
Language: Английский
Citations
0
Ecosphere, Journal Year: 2025, Volume and Issue: 16(3)
Published: March 1, 2025
Abstract Resource quality can have conflicting effects on host–parasite interactions; for example, higher resource might increase host investment in immune function, or conversely, permit greater parasite reproduction. Thus, anticipating the impact of changing interactions is challenging, especially because we often lack a mechanistic understanding how influences physiology and fitness to alter infection outcomes. We investigated whether there are generalizations affects multiple clones' with different parasites. used Daphnia freshwater zooplankton model system experimentally investigate gradient from high‐quality green algae poor‐quality cyanobacteria diets fitness, physiology, by two parasites: bacterium, Pasteuria ramosa , fungus, Metschnikowia bicuspidata . ran separate experiment each using factorial design four diets, dentifera clones, parasite‐inoculated ‐uninoculated treatments (16 per experiment). Diet strongly influenced fungus but not bacterium. These relationships between diet cannot be explained changes feeding rate (and, therefore, exposure). Instead, fungal was associated impacts earliest stage infection: hosts that fed poor had very few attacking spores their guts. did significantly influence responses. spore production differently parasites, reduced limiting number size (but number) bacterial spores. Diet, clone, all affected fitness. Interestingly, parasitic castrator induces gigantism; one infected still produced substantial offspring, whereas limitation hindered gigantism. Finally, were costs resisting infection, though these generally diet. Overall, show differentially exposure, proliferation processes parasites which highlights need use multi‐genotype multi‐parasite studies better understand complex interactions.
Language: Английский
Citations
0
Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Citations
0
Harmful Algae, Journal Year: 2023, Volume and Issue: 129, P. 102531 - 102531
Published: Oct. 22, 2023
For Microcystis aeruginosa PCC 7806, temperature decreases from 26 °C to 19 double the microcystin quota per cell during growth in continuous culture. Here we tested whether this increase provided M. 7806 with a fitness advantage colder-temperature by comparing concentration, cellular physiology, reactive oxygen species damage, and transcriptomics-inferred metabolism non-toxigenic mutant strain ΔmcyB. Photo-physiological data combined transcriptomic revealed metabolic changes at °C, which included increased electron sinks non-photochemical quenching. Increased gene expression was observed for glutathione-dependent peroxiredoxin cold treatment, suggesting compensatory mechanisms defend against are employed absence of mutant. Our observations highlight potential selective advantages longer-term defensive strategy management oxidative stress (i.e., making microcystin) vs shorter-term proactive producing components actively dissipate or degrade agents.
Language: Английский
Citations
10
Limnology and Oceanography Methods, Journal Year: 2024, Volume and Issue: 22(9), P. 681 - 699
Published: June 12, 2024
Abstract Freshwater cyanobacterial harmful algal blooms (CHABs) are a well‐known global public health threat. Monitoring and early detection of CHAB toxins currently accomplished using labor‐intensive sampling techniques subsequent shore‐based analyses, with results typically reported 24–48 h after sample collection. We have developed implemented an uncrewed, autonomous mobile sampler‐analytical system capable conducting targeted in situ toxin measurements < 2 h. A surface plasmon resonance (SPR) instrument was combined the environmental processor (ESP) to fully automate quantification particle‐associated microcystins (pMC). This sensor‐sampler integrated long‐range underwater vehicle (LRAUV) deployed western Lake Erie for field trials summer 2021. The LRAUV remotely piloted acquire samples at selected locations within adjacent CHAB. Sixteen pMC ranging from 0.09 0.55 μ g/L lake water were obtained over 14‐day period without recovery LRAUV. SPR/ESP/LRAUV complements existing satellite, aerial, manual survey techniques, could be used enhance predictive models that underpin bloom toxicity forecasts. is also extensible other freshwater marine environments, its near real‐time assessment levels potentially offering additional socioeconomic benefits protection variety settings.
Language: Английский
Citations
3
Environmental Pollution, Journal Year: 2023, Volume and Issue: 342, P. 123123 - 123123
Published: Dec. 9, 2023
Language: Английский
Citations
8
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 171121 - 171121
Published: Feb. 20, 2024
Elevated levels of dissolved microcystins (MCs) in source water due to rapid cell lysis harmful cyanobacterial blooms may pose serious challenges for drinking treatment. Catastrophic can result from outbreaks naturally-occurring cyanophages - as documented Lake Erie during the Toledo crisis 2014 and 2019, or through application algaecides treatment chemicals. Real-time detection would provide a valuable tool plant reservoir managers. In this study we explored two real-time fluorescence-based devices, PhycoSens PhycoLA, that detect unbound phycocyanin (uPC) potential indication MCs release. The was deployed at Low Service pump station City July 15 October 19, 2022 annual cyanobacteria bloom season. It measured major algal groups uPC incoming lake 15-min intervals dominant senescence periods. Intermittent detections over three-month period coincided with periods increasing proportions extracellular relative total (intracellular extracellular) MCs, indicating use an indicator integrity. Following exposures laboratory-cultured MCs-producing Microcystis aeruginosa NIES-298 (120 μg chlorophyll/L) cyanophage Ma-LMM01, copper sulfate (0.5 1 mg Cu/L), sodium carbonate peroxyhydrate (PAK® 27, 6.7 10 H
Language: Английский
Citations
2
Harmful Algae, Journal Year: 2024, Volume and Issue: 139, P. 102711 - 102711
Published: Aug. 23, 2024
Microcystis blooms are a global contemporary problem and the mechanisms underlying strain-level ecology (e.g. toxigenic fraction) toxin (microcystin, MC) production not sufficiently understood. Recent research suggests that MC synthesis depends on availability of nitrogen light, they protect cells against damage by H
Language: Английский
Citations
2