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  • Keyword = cyanobacteria.
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Records 1 to 25 of 387

Monitoring Cyanobacteria in Western Lake Superior and Chequamegon Bay using the Sentinel 3 Spaceraft: Preliminary Results
(PRESENTATION) [Presented : Jul 26, 2021]
Phycocyanin is a cyanobacteria-specific pigment that is a good indicator of cyanobacteria blooms and abundance although its concentration may vary depending on phytoplankton population. The Ocean and Land Color Imager (OLCI) on Sentinel 3 is equipped with spectral bands required ...
Observation of Harmful Algal Blooms with Ocean Colour Radiometry
(PUBLISHED REPORT) [Published : Mar 03, 2021]
Humans are exposed to harmful algal blooms (HABs) through a number of different pathways including ingestion, inhalation, and dermal uptake. Good water quality is necessary to support drinking water supplies, aquatic life, as well as recreation in, and on, the water. These resour...
Using algae and molecular-based approaches to characterize threats to freshwater ecosystems and to inform watershed management efforts
(PRESENTATION) [Presented : Mar 31, 2021]
This presentation will examine (1) how historical lake phytoplankton and remote sensing data are providing insights into long-term trends and possible expectations of cyanobacteria blooms and how they relate to nutrients and climate change, (2) the emerging use of DNA metabarcodi...
Co-occurring microorganisms regulate the succession of cyanobacterial harmful algal blooms
(JOURNAL) [To be published : Nov 01, 2021]
Cyanobacterial harmful algal blooms (CyanoHABs) have been found to transmit from N2 fixer-dominated to non-N2 fixer-dominated in many freshwater environments when the supply of N decreases. To elucidate the mechanisms underlying such “counter-i...
Ecological Insights into Assembly Processes and Network Structures of Bacterial Biofilms in Full-scale Biologically Active Carbon Filters under Ozone Implementation
(JOURNAL) [Published : Jan 10, 2021]
To address the adverse effects of harmful algal blooms, there are increased demands over the implementation of ozone-biologically active carbon (BAC) filters in the drinking water treatment plants. Although the microbial biofilms are vital elements to support the proper performan...
Highlighting the promise of qPCR-based environmental monitoring: response of the ribosomal RNA:DNA ratio of calanoid copepods totoxic cyanobacteria
(JOURNAL) [Published : Apr 01, 2021]
Like many other zooplankton species, copepods are monitored using cumbersome techniques that do not facilitate studying their occurrence and metabolic activity in natural systems. In this study, we used 18S rRNA gene sequencing analyses to identify the predominant calanoid copepo...
Assessing cyanobacterial frequency and abundance at surface waters near drinking water intakes across the United States
(JOURNAL) [Published : Aug 01, 2021]
This study presents the first large-scale assessment of cyanobacterial frequency and abundance of surface water near drinking water intakes across the United States. Public water systems serve drinking water to nearly 90% of the United States population. Cyanobacteria and their t...
Generating Ecotoxicity Information on Cyanotoxins and Prymnesins Using Extracts of Cultures and Surface Water Samples
(PRESENTATION) [Presented : May 06, 2021]
There is a lack of information to estimate safe levels for aquatic life concerning the toxicity of natural toxins produced by cyanobacteria and the freshwater invasive microalgae Prymnesium parvum. Given the uncertainty of standards for toxins, the cost of using them to conduct a...
Characterizing risk for harmful algae blooms on the Ohio River using time series data
(PRESENTATION) [Presented : Sep 03, 2020]
Two large harmful cyanobacteria blooms (CyanoHABs) have occurred on the Ohio River: One in 2015, affecting most of the river’s length, the other in 2019 covering 300 miles from Ashland to Louisville, KY. The blooms have threatened drinking water for millions of people, prom...
Cyanobacteria Assessment Network - lessons learned
(PRESENTATION) [Presented : Apr 20, 2021]
The Cyanobacteria Assessment Network is focused on monitoring these cyanobacteria blooms across the US. New validation methods have been developed along with quantified annual metrics to summarize the temporal frequency, spatial extent, magnitude and occurrence of these cyanobact...
CyAN 2019 Summary
(PRESENTATION) [Presented : Jul 24, 2020]
Changes in water quality can be challenging to detect, even in communities where routine monitoring occurs. Observing changes across multiple places and during various times can be difficult resulting in missed events such as the sudden development of cyanobacterial harmful algal...
Metagenome, Metatranscriptome and Metagenome-Assembled Genome Reveal Changes in Composition and Function of Five Waterworks with Different Treatment Processes in Finland
(PRESENTATION) [Presented : Jun 24, 2021]
The emergence and development of next-generation sequencing technologies (NGS) has made the analysis of the water microbiome in the drinking water distribution systems (DWDSs) more accessible and opens new perspectives in microbial ecology studies. The current study focused on th...
Prediction of Harmful Algal Blooms in Lake Erie At Sub-Monthly Timescales
(PRESENTATION) [Presented : Jun 11, 2021]
The growth dynamics of harmful algae Cyanobacteria (CyanoHAB) are highly variable over various temporal scales. At sub-daily timescales, CyanoHAB concentrations exhibit chaotic behavior. However, at annual timescales, these concentrations can be predicted by available nutrients a...
Satellite remote sensing to assess cyanobacterial bloom frequency across the United States at multiple spatial scales
(JOURNAL) [To be published : Sep 01, 2021]
Cyanobacterial blooms can have negative effects on human health and local ecosystems. Field monitoring of cyanobacterial blooms can be costly, but satellite remote sensing has shown utility for more efficient spatial and temporal monitoring across the United States. Her...
Remotely sensed cyanobacterial intensity predicts likelihood of lake blooms and toxins across the contiguous US.
(PRESENTATION) [Presented : May 19, 2021]
Cyanobacterial harmful algal blooms (CHABs) can produce toxins that impair freshwater ecosystems used for drinking water, recreation, and habitat for aquatic biota. With CHABs increasing in extent and intensity globally, water managers need information about how to prioritize lak...
Water Quality Monitoring for the 21st Century: A Sensor to Measure Toxicity
(PRESENTATION) [Presented : Jun 08, 2021]
Monitoring the increasing number of pollutants in source waters is an ongoing concern for water treatment systems and water resource managers. Pesticides, heavy metals, personal care products, natural toxins such as those from cyanobacteria, and a host of other organic and inorga...
Harnessing Solar Energy using Phototrophic Microorganisms: A Sustainable Pathway to Bioenergy, Biomaterials, and Environmental Solutions
(JOURNAL) [Published : Aug 01, 2021]
Phototrophic microorganisms (microbial phototrophs) use light as an energy source to carry out various metabolic processes producing biomaterials and bioenergy and supporting their own growth. Among them, microalgae and cyanobacteria have been utilized extensively for b...
CyANWeb: Cyanobacteria Assessment Network Cross-Platform Responsive Web Application (NEHA 2021)
(PRESENTATION) [Presented : Jun 02, 2021]
The Cyanobacteria Assessment Network (CyAN) is a multi-agency (NASA, USGS, NOAA, and EPA) project whose mission supports the environmental management and safe public use of U.S. lakes and reservoirs by providing a capability of detecting and quantifying algal blooms using satelli...
Seasonal Distribution of Cyanobacteria in Three Urban Eutrophic Lakes Results from an Epidemic-like Response to Environmental Conditions.
(JOURNAL) [Published : Apr 27, 2021]
Cyanobacterial communities of three co-located eutrophic sandpit lakes were surveyed during 2016 and 2017 over season and depth using high-throughput DNA sequencing of the 16S rRNA gene. All three lakes were stratified except during April 2017 when the lakes were recovering from ...
Chapter 2.7: β-Methylamino-L-alanine (BMAA)
(BOOK CHAPTER) [Published : Feb 28, 2021]
The chapter includes discussions of the formation and history of the BMAA-human neurodegenerative disease hypothesis on both Guam and the U.S.; the postulated human exposures from foods and environmental exposures; evidence for the relationship of BMAA and human disease; the toxi...
Monitoring Cyanobacteria in Rhode Island Lakes and Ponds Using Satellite Remote Sensing-Year 3
(PRESENTATION) [Presented : May 25, 2021]
Under certain conditions, cyanobacteria can experience rapid growth (blooms) and may produce toxins, which when released into surrounding waters can potentially cause health risks for wildlife, pets, livestock and humans. Working cooperatively, the Rhode Island Department of Heal...
How Cyanobacteria Work: Converting Sunlight Into Usable Energy
(PRESENTATION) [Presented : May 25, 2021]
This is a presentation to be delivered as part of the ORD/OW Small Systems Webinar series on May 25, 2021. It discusses the basics of how cyanobacteria convert the energy in solar radiation into chemical bond energy in ATP and NADPH.  ATP and NADPH can then be used throughou...
Increasingly severe cyanobacterial blooms and deep water hypoxia coincide with warming water temperatures in reservoirs
(JOURNAL) [Published : May 07, 2021]
Cyanobacterial blooms are expected to intensify and become more widespread with climate change and sustained nutrient pollution, subsequently increasing threats to lentic ecosystems, water quality, and human health. However, little is known about their rates of change because lon...
Substratum-Associated Microbiota
(JOURNAL) [Published : Oct 01, 2020]
Highlights of new, interesting, and emerging research findings on substratum¿associated microbiota covered from a survey of 2019 literature from primarily freshwaters provide insight into research trends of interest to the Water Environment Federation and others interested...
Exposure characterization of a cyanobacteria harmful algal bloom (CHAB) at Clear Lake, CA: Data Collection Methodology
(PRESENTATION) [Presented : Aug 27, 2018]
Potentially harmful freshwater algal blooms of cyanobacteria (CHAB) are increasingly reported among US surface waters. Clear Lake in Lake County, CA is regularly impacted by CHABs during the spring through fall. As part of the US Environmental Protection Agency (EPA)’s effo...