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Showing 1 to 20 of 156 for “"algal blooms"”.
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Predicting estuarine algal blooms using artificial neural networks
… a tributary of the Hawkesbury River, NSW. Algal blooms in this estuary are a regular feature of seasonal cycles and develop in response to non-periodic disturbances. Toxic algae, mostly Dinophyta, have led to fish kills and estuary closure. Most non-toxic algae present are from the division …
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The bio-optical detection of harmful algal blooms
… algorithm designed for the detection of harmful algal blooms. The adopted framework focuses on establishing quantitative relationships between optically important algal intracellular properties and inherent optical properties (IOPs), such as the absorption and backscattering coefficients, and the …
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Nitrogen nutrition of harmful algal blooms in upwelling systems
Blooms of toxic, or otherwise harmful phytoplankton species are known to occur in eastern boundary upwelling systems, coincident with the relaxation of upwelling in late<br/>summer/autumn. Field studies were carried out in 3 consecutive summers (March/April 06-08)<br/>in the Benguela and in the …
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Assessing the risk to aquaculture from Harmful Algal Blooms (HABs)
Harmful Algal Blooms (HABs) occur worldwide with regionally based differences in their<br/>occurrences. Some of these events have human health consequences due to associated<br/>shellfish poisoning symptoms after consumption of contaminated organisms. Negative<br/>economic implications from HABs …
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Landscape and climate drivers of harmful algal blooms in Iowa
1 PDF file (viii, 74 pages)
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Improving the predictability of harmful algal blooms around the Shetland Islands
Toxin producing harmful algal blooms (HABs) are one of the principal challenges facing the shellfish aquaculture industry. This is important because biotoxins are a serious threat to human health. Symptoms of algal toxin poisoning can range from the embarrassing and debilitating to neurological …
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Harvesting natural algal blooms for concurrent biofuel production and hypoxia mitigation
… benefits of harvesting detrimental environmental algal blooms and conversion of the harvested biomass into biofuels. An engineering model was developed to compare the energy efficiency of different harvesting methods and biofuel conversion techniques. The modeling data was largely compiled from a …
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Environmental Monitoring of Cyanobacterial Harmful Algal Blooms Using Small Unmanned Aerial Systems
Cyanobacterial harmful algal blooms (CHABs) degrade water quality and may produce toxins. The distribution of CHABs can change rapidly due to variations in population dynamics and environmental conditions. Biological and ecological aspects of CHABs were studied in order to better understand CHABs …
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Exploring undergraduate students’ topic interest, topic knowledge, and attitudes regarding harmful algal blooms
<p>Harmful algal blooms (HABs) are a growing concern in the US and abroad. Persistent misconceptions regarding HABs can increase the negative effects of bloom events by decreasing the effectiveness of communication efforts and impeding mitigation, monitoring, and recovery efforts. Addressing the …
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Sediment Resuspension in a Microtidal Estuary: Causative Forces and Links with Algal Blooms
… and species diversity has increased, however, algal blooms (primarily dinoflagellates) persist, occurring nearly every summer. Dinoflagellates produce resting cysts that accumulate in the bottom sediments and are thought to provide seed populations for future algal blooms when they are …
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Cyanobacterial Harmful Algal Blooms Vary Within and Across Years at Lake Fayetteville, Arkansas
<p>The occurrence of cyanobacterial harmful algal blooms (HABs) and toxins are a nationwide concern. Although Lake Fayetteville likely experienced HABs for many years, microcystin, an algal toxin, was not monitored until 2019. The objectives of this study were to: 1) observe temporal variation in …
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Chitosan Graphene Composite Fabrication and Characterization for Treatment of Harmful Algal Blooms and Toxins
… as a management strategy for harmful algal blooms (HABs) caused by various species of cyanobacteria. These chitosan graphene materials were compared to previously studied chitosan graphene-oxide composites in both material properties and HAB treatment. In previous studies, adsorption …
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Application of Machine Learning Techniques to Forecast Harmful Algal Blooms in Gulf of Mexico
<p>The Harmful Algal Blooms (HABs) forecast is crucial for the mitigation of health hazards and to inform actions for the protection of ecosystems and fisheries in the Gulf of Mexico (GoM). For the sake of simplicity of our application we assume ocean color satellite imagery from the National …
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Controls on the Formation of Algal Blooms in the Lower Chesapeake Bay and Its Tributaries
<p>Algal blooms occur seasonally in the Chesapeake Bay and its tributaries, and while the consequences of algal blooms have been qualitatively and quantitatively assessed, the causes of algal blooms and mechanisms of bloom initiation are still not well understood despite decades of research. In …
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Modeling the Spread of Airborne Particles Associated with Harmful Algal Blooms and Plumes of Colored Smoke
Lakes and oceans are threatened by harmful algal blooms (HABs), caused mostly by toxic cyanobacteria. When people or animals drink the toxic water, it can be damaging to their health, potentially leading to hospitalization or even death. In some cases, these toxins are not just limited to the …
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Drivers And Dynamics Of Harmful Algal Blooms: Understanding Nitrogen Fixation And Bloom Composition In Minnesota Temperate Lakes
… Among these microbial communities, harmful algal blooms (HABs), dominated by cyanobacteria capable of producing toxins, have emerged as a growing environmental concern due to their impacts on water quality, ecosystem services, and human health. Historically, phosphorus has been considered …
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Cyanobacteria harmful algal blooms in South Louisiana estuaries : a synthesis of field research, management implications, and outreach
… of algae, but 60% were not familiar with harmful algal blooms.
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The aggregation of clay minerals and marine microalgal cells : physicochemical theory and implications for controlling harmful algal blooms
… strategies for directly controlling harmful algal blooms (HABs). Its principle is based on the mutual aggregation of algal cells and mineral particles, leading to the formation of large flocs that rapidly settle to the ocean floor. This work investigated the effectiveness of various domestic …
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Biological Iron Limitation within Lake Superior's Watershed: Oligotrophic Algal Blooms Along a Land to Lake Gradient
… Concurrent rises in oligotrophic harmful algal blooms frequency could be influenced by recently relieved iron limitations. Lake Superior, while typically considered an environment resistant to harmful algal blooms, has begun to develop them along its southwest shore. This study …
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Simulation of high resolution winds over the southern Benguela upwelling system with potential application to harmful algal blooms
… system is particularly susceptible to Harmful Algal Blooms (HABs), most of which are attributed to dinoflagellate species. Dinoflagellates are favoured by stratified conditions. Consequently, temporal or spatial variations in ocean and atmospheric conditions that favour stratification will …
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