toxic algal bloom Articles

  • Impacts of Climate Change on the Occurrence of Harmful Algal Blooms

    Climate change has been occurring naturally as well as caused by anthropogenic activities over the decades. In relation to the fresh and marine water, the concentration of greenhouse gases results in temperature rise of surface water, lower pH and changes to precipitation, evaporation and vertical mixing of water. All these consequences of changing the environment in combination with excessive ...


    By LG Sonic

  • Impacts of Climate Change on the Occurrence of Harmful Algal Blooms

    Climate change has been occurring naturally as well as caused by anthropogenic activities over the decades. In relation to the fresh and marine water, the concentration of greenhouse gases results in temperature rise of surface water, lower pH and changes to precipitation, evaporation and vertical mixing of water. All these consequences of changing the environment in combination with excessive ...


    By LG Sonic

  • Use of molecular markers for early warning detection of harmful algal blooms

    Harmful Algal Blooms (HABs) are a biological hazard for, and can also result from, aquaculture. To minimise economic and environmental impacts, an early warning detection system is needed. In this paper, two most commonly used molecular techniques are introduced with applications and examples involving work on the putatively toxic dinoflagellate Pfiesteria piscicida. Unlike previous reviews ...


    By Inderscience Publishers

  • Algal Treatments

    Global warming means algal blooms can only increase. Tom Hall of the WRc Group reports on the latest research into treatment programmes Excessive algal growth in raw water reservoirs can cause severe problems with water supply, even in a traditional UK climate. Global warming means algal problems could become more frequent and acute in the UK, so effective control measures will become more ...


    By WRc plc

  • Straw preservation effects of Arundo donax L. on its allelopathic activity to toxic and bloom-forming Microcystis aeruginosa

    In this study, straw preservation effects of Arundo donax L. on its allelopathic activity to toxic and bloom-forming Microcystis aeruginosa were investigated. The aquatic extracts of fresh straw significantly inhibited the growth of M. aeruginosa. After 7 d of cultivation, the percentage inhibitions (PIs) of all treated groups were above 60% and the maximum ...


    By IWA Publishing

  • Phycotoxins in the marine environment: control of marine organisms for contamination with algal toxins

    On a global scale, the frequency and intensity of toxic algal blooms appear to be on the rise. There is also evidence of geographic spreading of toxic strains. Therefore, it is necessary to establish methods for the evaluation of possible hazards caused by the enrichment of algal toxins in the marine food chain. Different clinical types of algae-related poisoning have attracted scientific ...


    By Inderscience Publishers

  • Algae Control Solution for Chilean Salmon Industry?

    Since February 2016, Salmon farms in Chile have been suffering from an intensive Harmful Algal Bloom (HAB) which is causing massive numbers of salmon deaths. Ultrasonic technology combined with algae detection could be the solution for an industry facing economic losses totaling millions. Currently the Dutch algae control company, LG Sonic, is discussing the implementation of ultrasonic ...


    By LG Sonic

  • Isolation, identification, and algicidal activity of aerobic denitrifying bacterium R11 and its effect on Microcystis aeruginosa

    Recently, algicidal bacteria have attracted attention as possible agents for the inhibition of algal water blooms. In this study, an aerobic denitrifying bacterium, R11, with high algicidal activity against the toxic Microcystis aeruginosa was isolated from lake sediments. Based on its physiological characteristics and 16S rRNA gene sequence, it was identified as Raoultella, ...


    By IWA Publishing

  • Combined effects of the cyanobacterial toxin microcystin‐LR and environmental factors on life‐history traits of indigenous cladoceran Moina macrocopa

    Environmental factors are important in that they might interact with toxicants and could affect the concentration‐response relationship of the toxicants in the water environment. Microcystins (MCs) produced by algal blooming are natural toxins that exert severe impact on aquatic organisms. Despite the possibility of interaction effects between environmental factors and MCs, very few studies ...


    By John Wiley & Sons, Ltd.

  • Case study - Control and monitor algae in a lake

    As part of the Clearwater PMPC project, 2 MPC Buoys were deployed in the Skrzyneckie Małe Lake to test the performance of this unique technology. The Challenge: Control and Monitor Toxic Algal Blooms The ClearWaterPMPC project was initiated by LG Sound and funded by "Research for SMEs" within the EU 7th Framework Programme. The goal of the ClearWaterPMPC (Predicting, ...


    By LG Sonic

  • Using UV for Simultaneous Disinfection and Control of Unpleasant Tastes and Odors in Drinking Water

    Algae blooms in surface water sources often lead to off-tastes and odors in finished drinking water. Because public confidence in overall drinking water quality is closely related to aesthetic quality, there is increasing interest in solving taste and odor issues.  UV-oxidation, the combination of UV and hydrogen peroxide, offers the ability to treat taste and odor (T&O) while simultaneously ...

  • Taming Taste & Odor (T&O) Problems - Case Study

    Some taste and odors are caused by mineral constituents in the water, e.g. excess chlorine and hydrogen sulfide. However the majority of taste and odor are the result of biologic activity. Spring turnover of lakes and algal blooms are responsible for Blue-green algae (Cyanobacterium), Green algae and diatoms that introduce filter clogging organisms that also foul anion exchange resins, degrade ...


    By Jenfitch, LLC

  • Inhibitory mechanisms of Acacia mearnsii extracts on the growth of Microcystis aeruginosa

    Our previous work revealed that Acacia mearnsii extract can inhibit the growth of Microcystis aeruginosa, the common species forming toxic cyanobacterial blooms in eutrophic freshwater. In the present study, we demonstrated that this plant extract can significantly increase cell membrane permeability and Ca2+/Mg2+-ATPase activity on the ...


    By IWA Publishing

  • Pea Soup: A Second Helping

    In my February blog, I introduced you to a pretty serious situation which is taking place in many parts of the country and all over the world: algal blooms, cyanobacteria and cyanotoxins.  Well, it looks like last year's problems are once again repeating themselves.  First a quick refresher... Cyanotoxins are a group of toxic compounds produced by cyanobacteria.  They can be ...


    By Kinetico Incorporated

  • Effect of photoreactivation on ultraviolet inactivation of Microcystis aeruginosa

    Microcystis aeruginosa forms algal bloom in lakes. They produce toxic compounds such as microcystin. Against such algal problems, the effect of UV treatment was examined. In UV treatment, the effect of photoreactivation should be examined. Photoreactivation is a repair mechanism of genomic DNA damage by sunlight irradiation. UV treatment causes DNA damages on target cyanobacteria, however ...


    By IWA Publishing

  • 3 Common Water Quality Concerns

    About 10 percent of pond owners experience water quality problems in their ponds. Unfortunately, most pond owners pay little attention to managing the quality of water and never get it tested. As a result, the problem is detected only when it gets worst. Water quality is influenced by both natural processes and external environmental factors.Natural factors may include the types of rock and soil ...


    By LG Sonic

  • Checklist of Mediterranean free-living dinoflagellates

    An annotated checklist of free-living dinoflagellates (Dinophyceae) of the Black Sea, based on literature records, is reported and compared to the Mediterranean Sea and world oceans. Toxic species and/or responsible of harmful algal blooms (HAB) are marked in the checklist. From the 267 species (54 genera) listed nearly all taxa can be considered as cosmopolitan and no species as ...


  • Interactive effects of climate change with nutrients, mercury, and freshwater acidification on key taxa in the North Atlantic Landscape Conservation Cooperative region

    The North Atlantic Landscape Conservation Cooperative LCC (NA LCC) is a public‐private partnership that provides information to support conservation decisions that may be affected by global climate change (GCC) and other threats. The NA LCC region extends from southeast Virginia to the Canadian Maritime Provinces. Within this region, the U.S. National Climate Assessment documented increases in ...


    By John Wiley & Sons, Ltd.

  • Phosphorus runoff is a big problem, but Florida is getting closer to a solution

    Excess phosphorus runoff and emissions from urban areas and croplands, animal feedlots, sewage treatment plants, and combustion of fossil fuels has been blamed for the dead zone in the Gulf of Mexico, toxic algal blooms in Lake ...


    By Ensia

  • Nutrient Regulation on Streams: The Macrophyte Quandary

    ABSTRACTSince promulgation of the Clean Water Act in the 1970s and implementation of technology-based treatment requirements, such as secondary treatment for publicly owned treatment works, the nation’s water quality has improved dramatically. Current water quality concerns are no longer attributed to excessive loads of carbonaceous and nitrogenous biochemical oxygen demand. Rather, the largely ...

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