Download or read book Measuring Changes in Algal Derived Metabolites in Marine and Freshwater Systems written by Jonathan Scott Sauer and published by . This book was released on 2020 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metabolites produced by microalgae profoundly affect the natural environment as the dominant organic carbon source in the ocean and the dominant organic sulfur source to the atmosphere. Of particular interest to this dissertation is the production of algal metabolites in response to changes in organism health and biological community turnover. In this dissertation, algal metabolites are investigated in highly complex marine and in controlled commercial-oriented environments. Measurements of organosulfur gases dimethyl sulfide, methanethiol, and dimethyl disulfide during marine mesocosm experiments show that the production of highly reactive non-dimethyl sulfide organosulfur compounds can comprise a far larger fraction of total sulfur released from the ocean than previously understood. This production was found to depend on the bacterial assemblages present in each mesocosm in combination with the biochemistry of the water. To more accurately measure algal metabolites in the natural environment, a new ionization method for high resolution mass spectrometry of high-salt organic samples was applied to analysis of marine samples. This method demonstrated the ability to analyze unprocessed seawater for the first time. To produce systems which replicate the turnover of natural marine algae, a review of the ocean-atmosphere simulator approach is given. As an exemplar of this approach, an intensive experiment utilizing an ocean atmosphere simulator is given which discusses the system performance and mesocosm characteristics. As microalgae are increasingly used commercially as a source of renewable biomass, understanding the production of metabolites in response to deleterious factors such as grazing is needed. The connection between algal grazing and production of grazing-specific metabolites was investigated by combining the results from imaging mass spectrometry, liquid chromatography mass spectrometry, and gas chromatography mass spectrometry. These studies found chlorophyll-a related breakdown products in the solid and liquid phases which were connected to measurements of volatile gases. Continuous measurements of volatile gases from microalgae by chemical ionization mass spectrometry were performed to understand the timescale in which gas production in response to grazing occurs. Chemical ionization mass spectrometry was found to be able to detect grazing in algal cultures 24-72 hours faster than current best methods, opening a new monitoring approach for commercial microalgae.
Download or read book Real time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Download or read book Guidelines on recreational water quality Volume 1 written by World Health Organization and published by World Health Organization. This book was released on 2021-07-12 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of coastal, estuarine and freshwater recreational environments has significant benefits for health and well-being, including rest, relaxation, exercise, cultural and religious practices, and aesthetic pleasure, while also providing substantial local, regional and national economic benefits. These guidelines focus on water quality management for coastal and freshwater environments to protect public health. The guidelines: 1. describe the current state of knowledge about the possible adverse health impacts of various forms of water pollution; and2. set out recommendations for setting national health-based targets, conducting surveillance and risk assessments, putting in place systems to monitor and control risks, and providing timely advice to users on water safety.These guidelines are aimed at national and local authorities, and other entities with an obligation to exercise due diligence relating to the safety of recreational water sites. They may be implemented in conjunction with other measures for water safety (such as drowning prevention and sun exposure) and measures for environmental protection of recreational water use sites.
Download or read book Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms written by and published by DIANE Publishing. This book was released on 2002 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Freshwater Microbiology written by David C. Sigee and published by John Wiley & Sons. This book was released on 2005-09-27 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique textbook takes a broad look at the rapidly expanding field of freshwater microbiology. Concentrating on the interactions between viruses, bacteria, algae, fungi and micro-invertebrates, the book gives a wide biological appeal. Alongside conventional aspects such as phytoplankton characterisation, seasonal changes and nutrient cycles, the title focuses on the dynamic and applied aspects that are not covered within the current textbooks in the field. Complete coverage of all fresh water biota from viruses to invertebrates Unique focus on microbial interactions including coverage of biofilms, important communities on all exposed rivers and lakes. New information on molecular and microscopical techniques including a study of gene exchange between bacteria in the freshwater environment. Unique emphasis on the applied aspects of freshwater microbiology with particular emphasis on biodegradation and the causes and remediation of eutrophication and algal blooms.
Download or read book Algal Ecology written by and published by Academic Press. This book was released on 1996-06-03 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algae are an important component of aquatic benthic ecosystems because they reflect the health of their environment through their density, abundance, and diversity. This comprehensive and authoritative text is divided into three sections to offer complete coverage of the discussion in this field. The first section introduces the locations of benthic algae in different ecosystems, like streams, large rivers, lakes, and other aquatic habitats. The second section is devoted to the various factors, both biotic and abiotic, that affect benthic freshwater algae. The final section of the book focuses on the role played by algae in a variety of complex freshwater ecosystems. As concern over environmental health escalates, the keystone and pivotal role played by algae is becoming more apparent. This volume in the Aquatic Ecology Series represents an important compilation of the latest research on the crucial niche occupied by algae in aquatic ecosystems. Presents algae as the important player in relation to environmental health Prepared by leading authorities in the field Includes comprehensive treatment of the functions of benthic algae as well as the factors that affect these important aquatic organisms Acts as an important reference for anyone interested in understanding and managing freshwater ecosystems
Download or read book Methods for Measuring the Toxicity and Bioaccumulation of Sediment associated Contaminants with Freshwater Invertebrates written by and published by . This book was released on 1994 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment contamination is a widespread environmental problem that can potentially pose a threat to a variety of aquatic ecosystems. The sediment test methods in this manual will be used by The United States Environmental Protection Agency (USEPA) to make decisions under a range of statutory authorities concerning such issues as: dredged material disposal, registration of pesticides and toxic substances, superfound site assessment, and assessment and cleanup of hazardous waste treatment, storage, and disposal facilities. The use of uniform sediment testing procedures by USEPA programs is expected to increase data accuracy and precision, facilitate test replication, increase the comparative value of test results, and ultimately, increase the efficiency of regulatory processes requiring sediment tests.
Download or read book Global Ecology and Oceanography of Harmful Algal Blooms written by Patricia M. Glibert and published by Springer. This book was released on 2018-04-26 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmful algal blooms (HABs) - blooms that cause fish kills, contaminate seafood with toxins, or cause human or ecological health impacts and harm to local economies - are occurring more often, in more places and lasting longer than in past decades. This expansion is primarily the result of human activities, through increased nutrient inputs and various aspects of climate change. The Global Ecology and Oceanography of Harmful Algal Blooms (GEOHAB) programme promoted international collaboration to understand HAB population dynamics in various oceanographic regimes and to improve the prediction of HABs. This volume introduces readers to the overarching framework of the GEOHAB programme, factors contributing to the global expansion of harmful algal blooms, the complexities of HABs in different habitats, and the forward-looking issues to be tackled by the next generation of GEOHAB, GlobalHAB. The programme brought together an international team of contributing scientists and ecosystem managers, and its outcomes will greatly benefit the international research community.
Download or read book Sea Grant Abstracts written by and published by . This book was released on 1992 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Biofuels and Bioproducts written by James W. Lee and published by Springer Science & Business Media. This book was released on 2012-08-30 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed as a text not only for students and researchers, but anyone interested in green technology, Advanced Biofuels and Bioproducts offers the reader a vast overview of the state-of-the-art in renewable energies. The typical chapter sets out to explain the fundamentals of a new technology as well as providing its context in the greater field. With contributions from nearly 100 leading researchers across the globe, the text serves as an important and timely look into this rapidly expanding field. The 40 chapters that comprise Advanced Biofuels and Bioproducts are handily organized into the following 8 sections: · Introduction and Brazil's biofuel success · Smokeless biomass pyrolysis for advanced biofuels production and global biochar carbon sequestration · Cellulosic Biofuels · Photobiological production of advanced biofuels with synthetic biology · Lipids-based biodiesels · Life-cycle energy and economics analysis · High-value algal products and biomethane · Electrofuels
Download or read book Natural Products From Marine Algae written by Dagmar B. Stengel and published by Humana. This book was released on 2016-10-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a fundamental overview of the current state of the art in natural products from marine algae, linking the complex and diverse natural resource with recent developments in extraction, analytical and bioactivity testing methodologies. Natural Products from Marine Algae: Methods and Protocols guides readers through protocols and techniques on algal biotechnology, metabolites, Solid-Liquid Extraction (SLE), Microwave Assisted Extraction (MAE), Liquid Chromatography, Gas Chromatography, Nuclear Magnetic Resonance Spectroscopy, Infra-red spectroscopy and Raman Spectroscopy. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Natural Products from Marine Algae: Methods and Protocols hopes to aid scientists unravel and quantify algal chemical diversity and support further marine biotechnological developments.
Download or read book Algal Adaptation to Environmental Stresses written by L.C. Rai and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algae, generally held as the principal primary producers of aquatic systems, inhabit all conceivable habitats. They have great ability to cope with a harsh environment, e.g. extremely high and low temperatures, suboptimal and supraoptimal light intensities, low availability of essential nutrients and other resources, and high concentrations of toxic chemicals, etc. A multitude of physiological, biochemical, and molecular strategies enable them to survive and grow in stressful habitats. This book presents a critical account of various mechanisms of stress tolerance in algae, many of which may occur in microbes and plants as well.
Download or read book Marine Ecological Processes written by Ivan Valiela and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is aimed principally at the beginning graduate or advanced undergraduate student, but was written also to serve as a review and, more ambitiously, as a synthesis of the field. To achieve these purposes, several objectives were imposed on the writing. The first was, since ecol ogists must be the master borrowers of biology, to give the flavor of the eclectic nature of the field by providing coverage of many of the interdis ciplinary topics relevant to marine ecology. The second objective was to portray marine ecology as a discipline in the course of discovery, one in which there are very few settled issues. In many instances it is only possible to discuss diverse views and point out the need for further study. The lack of clear conclusions may be frustrating to the beginning student but nonetheless reflects the current-and necessarily exciting-state of the discipline. The third purpose is to guide the reader further into topics of specialized interest by providing sufficient recent references especially reviews. The fourth objective is to present marine ecology for what it is: a branch of ecology. Many concepts, approaches, and methods of marine ecology are inspired or derived from terrestrial and limnological antecedents. There are, in addition, instructive comparisons to be made among results obtained from marine, freshwater, and terrestrial environ ments, I have therefore incorporated the intellectual antecedents of par ticular concepts and some non-marine comparisons into the text.
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 Short term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms written by and published by . This book was released on 1994 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fungi in Coastal and Oceanic Marine Ecosystems written by Seshagiri Raghukumar and published by Springer. This book was released on 2017-04-04 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an ecosystem-oriented overview of the diversity, ecological role, and biotechnological applications of marine fungi as well as an in-depth introduction to the marine environment, fungal classification, and ecological principles. It also presents the latest research findings on coastal marine and oceanic ecosystems, such as mangrove, seagrass, salt marsh, algal, coral reef and benthic ecosystems. Focusing on the diversity of fungi as well as their role as symbionts, parasites and saprotrophs, the book also discusses the physiology and biotechnological applications of fungi and highlights topics of future interest. Intended for students and researchers in marine biology and microbiology, it includes detailed descriptions, illustrations, figures, tables, and exhaustive literature citations. A detailed chapter on methods used to study marine fungi, their classification and ecological principles is of particular interest to newcomers in the field.
Download or read book Recent Advances in the Analysis of Marine Toxins written by and published by Elsevier. This book was released on 2017-09-18 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Advances in the Analysis of Marine Toxins, Volume 78, the newest release in the Comprehensive Analytical Chemistry series, presents chapters from the best authors in the field, making it an essential resource. Updated sections in this new volume include topics such as The importance of toxin detection and quantification: environmental issues, public health, food safety, animal health, bioterrorism, bioactive compounds, medical approach, an LC-MS/MS analysis of marine toxins, Animal bioassays: identification of toxins and mechanism of action, Receptor binding assays for the analysis of marine toxins, Immunoassays and optical biosensors (visual, SPR, fluorescence) for marine toxins, and Electrochemical biosensors for marine toxins. Chapters in this ongoing series contain practical and useful information, describing real advantages and limitations. Experts in this field contribute based on their research and personal point-of-view. Contains contributions from the best authors in the field Provides an essential resource for marine monitoring managers and scientific community
