Download or read book ENVIRONMENTAL FACTORS AFFECTING THE PRODUCTION OF CYANOBACTERIAL BLOOMS AND CYANOTOXINS written by Miss RAKHI Bajpai and published by Miss Rakhi Bajpai. This book was released on 2023-02-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: [0:34 pm, 23/02/2023] Hafi: Cyanobacterial blooms and cyanotoxins are influenced by a variety of environmental factors. Some of the key factors that affect the production of these blooms and toxins include: Nutrient levels: Cyanobacteria require nutrients, particularly phosphorus and nitrogen, to grow and reproduce. Excess nutrients from human activities, such as agricultural and industrial runoff, sewage discharges, and atmospheric deposition, can promote the growth of cyanobacteria, leading to the formation of blooms. Temperature: Cyanobacteria are able to thrive in warm water environments. As water temperatures rise, cyanobacterial growth rates can increase, leading to more frequent and prolonged blooms. Cyanobacteria or Blue green bacteria, erstwhile known as Blue-Green Algae (BGA), are a group of gram-negative photosynthetic bacteria. These are micro-organisms which resemble bacteria in their prokaryotic nature but unlike bacteria, they are not chemosynthetic but oxygen evolving photosynthetic organisms. Their photosynthetic capability is due to the presence of essential and accessory photosynthetic pigments chlorophyll-a, (chlorophyll-b absent), carotenes, xanthophylls and phycoblin pigments namely c-phycocyanin and c- phycoerythrin. The last two pigments are found only in cyano Light: Cyanobacteria require light for photosynthesis, and high light intensity can enhance their growth. However, too much light can also cause photoinhibition, which can inhibit their growth. pH: Cyanobacteria can grow in a wide range of pH conditions, but they generally prefer alkaline conditions. Acidic conditions can inhibit their growth. Water flow: Cyanobacteria prefer still or slow-moving water. High water flow rates can prevent their growth and the formation of blooms. Salinity: Cyanobacteria can grow in both freshwater and saltwater environments, but different species have different salinity tolerances. Turbidity: High levels of suspended solids, such as sediment and organic matter, can decrease light penetration and limit cyanobacterial growth. Dissolved oxygen: Cyanobacteria can produce oxygen through photosynthesis, but as blooms grow and die off, they can deplete dissolved oxygen levels, leading to hypoxia and anoxia. These environmental factors can interact with each other in complex ways, and their effects on cyanobacterial blooms and cyanotoxins can vary depending on the specific species of cyanobacteria present, as well as other environmental and biological factors. [0:35 pm, 23/02/2023] Hafi: nutrient levels; temperature; light; pH; water flow; salinity; turbidity; dissolved oxygen; cyanobacterial blooms; cyanotoxins.

Download or read book Cyanotoxins written by Ingrid Chorus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxic cyanobacteria are increasingly recognised as a potential hazard in water for human use. The recent availability of methods for quantitative screening is leading to a surge of research on their occurrence. This book presents a novel compilation of extensive screening results showing the cyanotoxin levels that may be expected when certain taxa dominate. These results indicate cyanotoxins to be the most widespread among the chemicals of concern in water used for drinking and recreation. It further combines field data with results from laboratory culture experiments to suggest a unifying view of how environmental factors control the cyanotoxin levels in natural waters. A practical section is dedicated to the exposure of humans through drinking-water and recreation.

Download or read book Cyanobacterial Harmful Algal Blooms State of the Science and Research Needs written by H. Kenneth Hudnell and published by Springer Science & Business Media. This book was released on 2008-03-13 with total page 955 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the ever-increasing incidence of harmful cyanobacterial algal blooms, this monograph has added urgency and will be essential reading for all sorts of researchers, from neuroscientists to cancer research specialists. The volume contains the proceedings of the 2005 International Symposium on Cyanobacterial Harmful Algal Blooms, and has been edited by H. Kenneth Hudnell, of the US Environmental Protection Agency. It contains much of the most recent research into the subject.

Download or read book Toxic Cyanobacteria in Water written by Ingrid Chorus and published by CRC Press. This book was released on 2021-03-08 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyanobacterial toxins are among the hazardous substances most widely found in water. They occur naturally, but concentrations hazardous to human health are usually due to human activity. Therefore, to protect human health, managing lakes, reservoirs and rivers to prevent cyanobacterial blooms is critical. This second edition of Toxic Cyanobacteria in Water presents the current state of knowledge on the occurrence of cyanobacteria and cyanotoxins as well as their impacts on health through water-related exposure pathways, chiefly drinking-water and recreational activity. It provides scientific and technical background information to support hazard identification, assessment and prioritisation of the risks posed by cyanotoxins, and it outlines approaches for their management at each step of the water-use system. It sets out key practical considerations for developing management strategies, implementing efficient measures and designing monitoring programmes. This enables stakeholders to evaluate whether there is a health risk from toxic cyanobacteria and to mitigate it with appropriate measures. This book is intended for those working on toxic cyanobacteria with a specific focus on public health protection. It intends to empower professionals from different disciplines to communicate and cooperate for sustainable management of toxic cyanobacteria, including public health workers, ecologists, academics, and catchment and waterbody managers. Ingrid Chorus headed the department for Drinking-Water and Swimming-Pool Hygiene at the German Environment Agency. Martin Welker is a limnologist and microbiologist, currently with bioMérieux in Lyon, France.

Download or read book Cyanobacteria Blooms written by Danni Cong and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bloom-forming cyanobacteria are harmful to both environment and public health because of the release of water soluble toxins. This report provides a broad overview of cyanobacteria and cyanotoxins and the current state of knowledge about the bloom control management. Cyanobacteria blooms usually flourish in warm, lentic, and eutrophic waters. Several environmental factors such as temperature, nutrients, light intensity, and turbulence can affect cyanobacterial growth and the formation of bloom. Cyanobacteria can synthesize multiple types of toxins, which cause human and animal toxications worldwide. Cyanobacterial blooms also cause detrimental effects on aquatic ecosystems, and the taste and odor problems in drinking water supplies. Due to the adverse effects, treatments that are used for removing both cyanobacterial cells and aqueous cyanotoxins should be carried out once cyanobacterial blooms occur in freshwaters. Strategies based on physical, chemical, and biological methods are carried out to remove the cyanobacteria and cyanotoxins. All of these strategies have both advantages and disadvantages: some physical treatment methods can remove cyanotoxins within the intact molecules, but the cost is usually high and further processing is needed; some chemical methods are cheap and can degrade the cyanotoxins, however, the toxicological characterization of the chemical and the by-products needs to be investigated; some biological treatments are more environmentally friendly, but the long reaction time and some other external factors also pose some problems that affect the efficiency of the treatments. The paper concludes that the key to success is to find a reasonable balance between those advantages and disadvantages, and the specific conditions of each unique aquatic ecosystem should be taken into consideration. As well, some suggestions are also proposed for the further development of more robust monitoring and management strategies.

Download or read book Cyanobacterial blue green Algal Toxins written by Richard Scott Yoo and published by American Water Works Association. This book was released on 1995 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxic Cyanobacteria in Water written by Ingrid Chorus and published by CRC Press. This book was released on 1999-02-11 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyanobacteria and their toxins are an increasing global public health menace. Most recently, problems have been experienced in Australia, the United States and, due to drought and increasing water scarcity, pose a severe threat in the U.K. With an international range of contributors, all leading experts in their fields, Toxic Cyanobacteria in Water examines the increasing need to protect drinking water and water resources from the hazards of Cyanobacteria and their impact on health. Written and edited by a World Health Organization working group, Toxic Cyanobacteria in Water is an operational handbook in a practical, assessible style. Toxic Cyanobacteria in Water will be invaluable to environmental health officers, professionals in the fields of water supply, public health, fresh water ecology and education, national and international organizations, special interest groups, post-graduate students and utilities responsible for managing drinking water supplies.

Download or read book Harmful Cyanobacteria written by Jef Huisman and published by Springer Science & Business Media. This book was released on 2005-06-15 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This outstanding volume provides an up-to-date overview of the advances in our knowledge of harmful cyanobacteria. An essential reference for all scientists and environmental professionals interested in cyanobacterial ecology and water management.

Download or read book Advances in Cyanobacterial Biology written by Prashant Kumar Singh and published by Academic Press. This book was released on 2020-03-04 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Cyanobacterial Biology presents the novel, practical, and theoretical aspects of cyanobacteria, providing a better understanding of basic and advanced biotechnological application in the field of sustainable agriculture. Chapters have been designed to deal with the different aspects of cyanobacteria including their role in the evolution of life, cyanobacterial diversity and classification, isolation, and characterization of cyanobacteria through biochemical and molecular approaches, phylogeny and biogeography of cyanobacteria, symbiosis, Cyanobacterial photosynthesis, morphological and physiological adaptation to abiotic stresses, stress-tolerant cyanobacterium, biological nitrogen fixation. Other topics include circadian rhythms, genetics and molecular biology of abiotic stress responses, application of cyanobacteria and cyanobacterial mats in wastewater treatments, use as a source of novel stress-responsive genes for development of stress tolerance and as a source of biofuels, industrial application, as biofertilizer, cyanobacterial blooms, use in Nano-technology and nanomedicines as well as potential applications. This book will be important for academics and researchers working in cyanobacteria, cyanobacterial environmental biology, cyanobacterial agriculture and cyanobacterial molecular biologists. Summarizes the various aspects of cyanobacterial research, from primary nitrogen fixation, to advanced nano-technology applications Addresses both practical and theoretical aspects of the cyanobacterial application Includes coverage of biochemical and molecular approaches for the identification, use and management of cyanobacteria

Download or read book Climate Change and Marine and Freshwater Toxins written by Luis M. Botana and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-12-16 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasingly widespread production of toxins by marine and freshwater microalgae raises serious concerns regarding seafood and drinking water safety. This book compiles studies on the influence of climate change on the spreading of toxin-producing species in aquatic systems. The chemistry and biology of toxin production is revised and an outlook on control and prevention of the toxins' impact on human and animal health is given.

Download or read book Freshwater Algal Toxins written by Angeles Jos and published by MDPI. This book was released on 2020-12-11 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyanobacterial abundance has increased disproportionately, and this trend is likely to continue in the coming decades. This increase not only has deleterious effects on ecosystem biodiversity but also adversely affects drinking water supplies, livestock watering, crop yields, aquaculture, etc. Thus, the proliferation of cyanobacterial blooms presents human and animal health risks due to the common production of potent toxins, cyanotoxins. Moreover, these risks are aggravated by the accumulation potential of cyanotoxins and their transference to the food chain. In spite of the worldwide increasing occurrence of cyanotoxins, they are still underestimated in regulations. However, risk management of cyanotoxins is only possible after a thorough risk evaluation, and for that purpose, toxicity and exposure data are required. Thus, occurrence and monitoring information is of key importance, and new data in relation to the conditions that favor cyanobacterial growth and cyanotoxin production are welcome in order to prevent their appearance. On the other hand, in regard to toxicity, there are still many data gaps to fill. This book compiles 10 research papers and a review, which provide valuable contributions on all these aspects and demonstrate the importance of cyanobacteria toxins research.

Download or read book Cyanobacteria written by Naveen K. Sharma and published by John Wiley & Sons. This book was released on 2013-11-22 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experts in the field, Cyanobacteria: An Economic Perspective is a comprehensive edited volume covering all areas of an important field and its application to energy, medicine and agriculture. Issues related to environment, food and energy have presented serious challenge to the stability of nation-states. Increasing global population, dwindling agriculture and industrial production, and inequitable distribution of resources and technologies have further aggravated the problem. The burden placed by increasing population on environment and especially on agricultural productivity is phenomenal. To provide food and fuel to such a massive population, it becomes imperative to find new ways and means to increase the production giving due consideration to biosphere’s ability to regenerate resources and provide ecological services. Cyanobacteria are environment friendly resource for commercial production of active biochemicals, drugs and future energy (biodiesel, bioethanol and hydrogen). Topics on isolation, identification and classification of cyanobacteria are discussed, as well as further sections on: summarizing a range of useful products synthesized by cyanobacteria, ecological services provided by cyanobacteria including their harmful effect in water bodies and associated flora and fauna. Chapter on tools, techniques, and patents also focus on the economic importance of the group. This book also provides an insight for future perspectives in each particular field and an extensive bibliography. This book will be a highly useful resource for students, researchers and professionals in academics in the life sciences including microbiology and biotechnology.

Download or read book Relationship Between Toxic Cyanobacterial Blooms Psycho chemical Factors and Multiple Source Excreta Contamination in Affected Watershed written by Valentina Muñoz Ramos and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Missisquoi Bay (MB) is a temperate eutrophic freshwater ecosystem located in an agricultural watershed and it frequently experiences toxic Microcystis-dominated cyanobacterial blooms. Cyanobacterial population dynamics are influenced by a plethora of factors that may differ from system to system, requiring a site-specific assessment of bloom-promoting factors to design more effective bloom prevention or remediation strategies. This is the first biomonitoring study that combined data from high-throughput 16S rRNA gene amplicon sequencing, qPCR and environmental parameters from temporal and spatial samples to identify the main bloom-promoting factors. In addition, high-throughput amplicon sequencing of mitochondrial DNA genes was performed to qualitatively identify potential external sources of nutrients originating from animal excreta. Particular emphasis was placed on 1) determining whether there was a link between nutrients from external sources and cyanobacterial blooms and 2) analyzing in situ the effect of environmental factors (particularly nitrogen (N) and phosphorus (P) concentrations) on the dynamics of cyanobacterial community composition, abundance and toxicity.The concentrations of total P (TP) and total N (TN) in MB in 2009 correlated significantly with the abundance of total cyanobacterial cells, the Microcystis 16S rRNA and mcyD genes and intracellular microcystin. The results suggest that external sources of nutrients, such as surface runoff and animal excreta, played a significant role in the load of nutrients into the bay and thus in the proliferation of toxic cyanobacterial blooms. This was indicated by the detection of non-aquatic mitochondrial DNA hosts in the bay and the relationships between the pattern of surface runoff, nutrient concentrations, E. coli counts and total cyanobacterial abundance. Potential sources of nutrients from non-aquatic animal excreta in the system comprised rodents, birds, cattle and humans, indicating that efforts are required to control pollution from animal excreta in MB. During the growing season, the major cyanobacterial taxa were members of the orders Chroococcales and Nostocales. The genus Microcystis was identified as the main mcyD-carrier and main microcystin producer, hence the most problematic taxon in the cyanobacterial bloom. The correlations observed with environmental parameters suggest that increasing nutrient concentrations and TN:TP (mass) ratios approaching 11:1, coupled with an increase in temperature, promoted Microcystis-dominated toxic cyanobacterial blooms. Although the importance of nutrient ratios and absolute concentrations on cyanobacterial and Microcystis dynamics has been documented, this is the first time that an optimum TN:TP ratio for Microcystis dominance has been observed in the field. This observation provides further support to the theory that nutrient supply ratios are an important determinant of species composition in natural phytoplankton assemblages. Although the validity and prediction potential of this optimum ratio for Microcystis dominance has yet to be verified through longer-term studies, it may provide practical guidelines for nutrient management strategies to avoid the proliferation of this toxin producing cyanobacterial genus in MB. " --

Download or read book Water Treatment for Purification from Cyanobacteria and Cyanotoxins written by Anastasia E. Hiskia and published by John Wiley & Sons. This book was released on 2020-09-28 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive overview of key methods for treating water tainted by cyanobacteria and cyanotoxins Toxigenic cyanobacteria are one of the main health risks associated with water resources. Consequently, the analysis, control, and removal of cyanobacteria and cyanotoxins from water supplies is a high priority research area. This book presents a comprehensive review of the state-of-the-art research on water treatment methods for the removal of cyanobacteria, taste and odor compounds, and cyanotoxins. Starting with an introduction to the subject, Water Treatment for Purification from Cyanobacteria and Cyanotoxins offers chapters on cyanotoxins and human health, conventional physical-chemical treatment for the removal of cyanobacteria/cyanotoxins, removal of cyanobacteria and cyanotoxins by membrane processes, biological treatment for the destruction of cyanotoxins, and conventional disinfection and/or oxidation processes. Other chapters look at advanced oxidation processes, removal/destruction of taste and odour compounds, transformation products of cyanobacterial metabolites during treatment and integrated drinking water processes. Provides a comprehensive overview of key methods for treating water tainted by cyanobacteria and cyanotoxins Bridges the gap between basic knowledge of cyanobacteria/cyanotoxins and practical management guidelines Includes integrated processes case studies and real-life examples Developed within the frame of the European Cooperation in Science and Technology (COST)–funded CYANOCOST A must-have resource for every water treatment plant, Water Treatment for Purification from Cyanobacteria and Cyanotoxins is a valuable resource for all researchers in water chemistry and engineering, environmental chemistry as well as water companies and authorities, water resource engineers and managers, environmental and public health protection organizations.

Download or read book Cyanobacteria written by A.K. Mishra and published by Academic Press. This book was released on 2018-11-30 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyanobacteria constitute the most widely distributed group of photosynthetic prokaryotes found in almost all realms of the earth and play an important role in Earth's nitrogen and carbon cycle. The gradual transformation from reducing atmosphere to oxidizing atmosphere was a turning point in the evolutionary history of the earth and made conditions for present life forms possible. Cyanobacteria: From Basic Science to Applications is the first reference volume that comprehensively discusses all aspects of cyanobacteria, including the diverse mechanisms of cyanobacteria for the advancement of cyanobacterial abilities, towards higher biofuel productivity, enhanced tolerance to environmental stress and bioactive compounds and potential for biofertilizers. - Describes cyanobacterial diversity, stress biology, and biotechnological aspects of cyanobacteria - Explores the global importance of cyanobacteria - Provides a broad compilation of research that deals with cyanobacterial stress responses in both controlled laboratory conditions as well as in their natural environment

Download or read book Toxic Microcystis written by Mariyo F. Watanabe and published by CRC Press. This book was released on 1995-11-21 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses toxic Microcystis and the toxins from various viewpoints such as classification, cultivation, occurrences in lakes, and relations to zooplankton. The text presents new information on the chemistry, analytical chemistry, toxicology, molecular modeling, and liver tumor promotion of the toxins. Microcystis species are described in relation to morphological features, allozyme genotype, and toxin content. Seasonal changes of Microcystis population are described with special references to toxic species and composition of the toxins. Chemical characteristics of microcystins are reviewed and the process for identification of microcystins is described.

Download or read book Biological and Environmental Hazards Risks and Disasters written by Ramesh Sivanpillai and published by Elsevier. This book was released on 2023-06-22 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological and Environmental Hazards, Risks, and Disasters, Second Edition provides an integrated look at major impacts to the Earth’s biosphere caused by diseases, algal blooms, insects, animals, species extinction, deforestation, land degradation, and comet and asteroid strikes, with important implications for humans. This second edition from Elsevier’s Hazards and Disasters Series incorporates perspectives from the natural and social sciences to offer in-depth coverage of threats from microscopic organisms to celestial objects and their potential impacts. Contributions from expert biological, health, ecological, environmental, wildlife, physical, and health scientists, readers will gain valuable insights on damages, causality, economic impacts, preparedness, and mitigation. Provides inter- and multi-disciplinary research accessible to both specialists and non-specialists Includes newly added chapters on emerging hazards and risks to earth’s ecosystems (land conversion and habitat loss) and human health (spread of diseases) Contains full-color tables, maps, diagrams, illustrations, and photographs of hazardous processes