Download or read book Seasonal Variation in the Effects of Nutrient and Dissolved Organic Matter Concentrations on the Response of Phytoplankton Community Structure to Ultraviolet Radiation written by Caren E. Scott and published by . This book was released on 2006 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interactive Effects of Temperature Nutrient Availability and Dissolved Organic Carbon Concentrations on the Response of Alpine Phytoplankton Population Growth to Ultraviolet Radiation written by Shaina A. Doyle and published by . This book was released on 2005 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemistry of Marine Dissolved Organic Matter written by Dennis A. Hansell and published by Academic Press. This book was released on 2014-10-02 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine dissolved organic matter (DOM) is a complex mixture of molecules found throughout the world's oceans. It plays a key role in the export, distribution, and sequestration of carbon in the oceanic water column, posited to be a source of atmospheric climate regulation. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, focuses on the chemical constituents of DOM and its biogeochemical, biological, and ecological significance in the global ocean, and provides a single, unique source for the references, information, and informed judgments of the community of marine biogeochemists. Presented by some of the world's leading scientists, this revised edition reports on the major advances in this area and includes new chapters covering the role of DOM in ancient ocean carbon cycles, the long term stability of marine DOM, the biophysical dynamics of DOM, fluvial DOM qualities and fate, and the Mediterranean Sea. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, is an extremely useful resource that helps people interested in the largest pool of active carbon on the planet (DOC) get a firm grounding on the general paradigms and many of the relevant references on this topic. Features up-to-date knowledge of DOM, including five new chapters The only published work to synthesize recent research on dissolved organic carbon in the Mediterranean Sea Includes chapters that address inputs from freshwater terrestrial DOM

Download or read book The Ecology of Phytoplankton written by C. S. Reynolds and published by Cambridge University Press. This book was released on 2006-05-04 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important new book by Colin Reynolds covers the adaptations, physiology and population dynamics of phytoplankton communities. It provides basic information on composition, morphology and physiology of the main phyletic groups represented in marine and freshwater systems and in addition reviews recent advances in community ecology.

Download or read book Treatise on Estuarine and Coastal Science written by and published by Academic Press. This book was released on 2012-03-06 with total page 4604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of estuaries and coasts has seen enormous growth in recent years, since changes in these areas have a large effect on the food chain, as well as on the physics and chemistry of the ocean. As the coasts and river banks around the world become more densely populated, the pressure on these ecosystems intensifies, putting a new focus on environmental, socio-economic and policy issues. Written by a team of international expert scientists, under the guidance of Chief Editors Eric Wolanski and Donald McClusky, the Treatise on Estuarine and Coastal Science, Ten Volume Set examines topics in depth, and aims to provide a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Most up-to-date reference for system-based coastal and estuarine science and management, from the inland watershed to the ocean shelf Chief editors have assembled a world-class team of volume editors and contributing authors Approach focuses on the physical, biological, chemistry, ecosystem, human, ecological and economics processes, to show how to best use multidisciplinary science to ensure earth's sustainability Provides a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Features up-to-date chapters covering a full range of topics

Download or read book Ecology Abstracts written by and published by . This book was released on 1999 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Download or read book DIRECT AND INDIRECT EFFECTS OF ULTRAVIOLET RADIATION AND DISSOLVED ORGANIC MATTER ON FRESHWATER FLAGELLATES written by Amy L. Macaluso and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biology

Download or read book YOUMARES 8 Oceans Across Boundaries Learning from each other written by Simon Jungblut and published by Springer. This book was released on 2018-08-29 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents the proceedings volume of the YOUMARES 8 conference, which took place in Kiel, Germany, in September 2017, supported by the German Association for Marine Sciences (DGM). The YOUMARES conference series is entirely bottom-up organized by and for YOUng MARine RESearchers. Qualified early career scientists moderated the scientific sessions during the conference and provided literature reviews on aspects of their research field. These reviews and the presenters’ conference abstracts are compiled here. Thus, this book discusses highly topical fields of marine research and aims to act as a source of knowledge and inspiration for further reading and research.

Download or read book Modeling the Plankton Enhancing the Integration of Biological Knowledge and Mechanistic Understanding written by Christian Lindemann and published by Frontiers Media SA. This book was released on 2017-12-28 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In light of climate change and allied changes to marine ecosystems, mathematical models have become an important tool to examine processes and predict phenomena from local through to global scales. In recent years model studies, laboratory experiments and a better ecological understanding of the pelagic ecosystem have enabled advancements on fundamental challenges in oceanography, including marine production, biodiversity and anticipation of future conditions in the ocean. This research topic presents a number of studies that investigate functionally diverse organism in a dynamic ocean through diverse and novel modeling approaches.

Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-04 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.

Download or read book UV Radiation and Arctic Ecosystems written by D.O. Hessen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although there are some biological processes that are supported by UV radiation, most organisms are stressed by it in various ways, e.g. through DNA damage. Top international experts present an integrated overview of UV radiation and its effects on terrestrial, freshwater and marine Arctic biota. Increased stratospheric ozone depletion and the corresponding increase in ground levels of UV radiation as well as ambient, "natural" UV radiation as a key ecological factor in the Arctic spring and summer are discussed in detail. Additionally, basic information on Arctic ecosystems is given. The volume provides not only an excellent account of present-day knowledge of the subject, but also describes the state of the art on which future research can be built.

Download or read book Ecophysiological Responses of Phytoplankton to Environmental Cues a Laboratory Approach written by Tristyn Bercel and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytoplankton are primary producers in the marine food web, providing energy and matter for higher trophic levels by fixing CO2 and inorganic nutrients into biomass. This production of particulate organic matter by marine phytoplankton, its consumption by higher trophic levels, and the eventual export out of the euphotic zone drive the biological carbon pump. Marine phytoplankton thus simultaneously exert influence over and are influenced by global biogeochemical cycles. The effects of changing environmental conditions, such as light, temperature, and CO2 concentration, play a key role in shaping phytoplankton community structure and function. Responses to environmental change vary between phytoplankton taxa, and even within species, making predictions of such responses difficult. Therefore, we need to understand how and why phytoplankton photosynthesis responds to environmental cues. Investigation of the ecophysiological responses of phytoplankton is often done in laboratory studies where environmental conditions are mimicked in growth incubators. Recently, LED technology has advanced, leading many incubator manufacturers and research labs to switch to these more efficient, yet spectrally restricted, light sources. The effects of commercially available light systems on phytoplankton ecophysiology have not yet been characterized but could affect our interpretation of lab-based projections on responses to environmental changes. We investigated these effects with cultures of Prochlorococcus marinus, Synechococcus sp., and Thalassiosira weissflogii grown under three different commercially available LED lights along with a fluorescent growth light. We found that growth rate was unaffected across species, however, each species responded with adjustments to cellular chlorophyll a, carbon, and nitrogen quotas, photoacclimation state, and primary production. These cellular acclimation responses should be considered when designing laboratory-based incubation experiments to mimic the natural environment. Next, I investigated carbon acquisition in the red tide forming marine dinoflagellate, Karenia brevis. K. brevis is commonly found in the Gulf of Mexico and produces brevetoxin, a potent neurotoxin which can cause mortality in marine animals as well as respiratory illness in humans, making it an ecologically and economically relevant species. Previous work done on K. brevis had shown sensitivity to changes in CO2 in terms of growth and toxin production. I investigated the underlying mechanisms, including photosynthesis, inorganic carbon acquisition, and photophysiology, to understand this sensitivity. K. brevis (CCFWC-126) did not show a significant response in growth, cellular composition of carbon and nitrogen, nor in photosynthetic rates between pCO2 concentrations of 150, 400 or 780 μatm. However, a strong response in its acquisition of inorganic carbon was found. Half saturation values for CO2 increased, inorganic carbon preference switched from HCO3- to CO2, and external carbonic anhydrase activity was downregulated when comparing low and high pCO2. I thus demonstrated the presence of an efficient and regulated carbon concentrating mechanism (CCM) in K. brevis. This study is the first explaining how this socioeconomically important species can efficiently supply inorganic carbon for photosynthesis which can potentially prolong bloom situations. Like many other marine dinoflagellates, previous work has demonstrated the use of mixotrophic metabolic strategies in K. brevis, including the uptake of dissolved organic matter as well as grazing on picocyanobacteria. While it has been demonstrated that K. brevis is capable of multiple nutritional strategies, the balance of autotrophy and heterotrophy during mixotrophic growth has not been examined. We investigated the uptake of several DOM sources in K. brevis CC-FWC126 using isotopic labeling techniques and quantification of photosynthetic activity. Additionally, we examined metatranscriptomes for multiple K. brevis isolates to survey the extent of mixotrophic ability. While we did not obtain conclusive proof of DOM utilization by K. brevis in our lab, this does not preclude its ability to utilize DOM under conditions not presently measured. Changes seen in cellular chl a and photophysiological adjustments do suggest that DOM affects energy generation in K. brevis, but the present study was unable to determine the cause of these changes in relation to changes in nutritional mode. We also cannot rule out the role of bacterial regeneration in the culture bottles despite the cleaning of cultures, which could mediate the DOM breakdown process, influencing what is available to K. brevis uptake. Metatranscriptome analysis for 4 K. brevis clones revealed the presence and expression of genes for DOM transporters and degradation enzymes as well as genes involved in phagotrophy in all transcriptomes, suggesting mixotrophy is a common trait among K. brevis clones. I then discuss the ecophysiology implications for mixotrophy in K. brevis and how this might affect bloom life cycles.

Download or read book Microbiology Abstracts written by and published by . This book was released on 1993 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Pollution and Human Health written by Ronald E. Hester and published by Royal Society of Chemistry. This book was released on 2011 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses marine pathogens, pollution, and toxic algal blooms and their impact on coastal ecosystems and human health.

Download or read book Sustainable Living with Environmental Risks written by Nobuhiro Kaneko and published by Springer. This book was released on 2014-03-11 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are not free from environmental risks that accompany the development of human societies. Modern economic development has accelerated environmental pollution, caused loss of natural habitats, and modified landscapes. These environmental changes have impacted natural systems: water and heat circulation, nutrient cycling, and biodiversity. These changes in natural systems degrade ecosystem services and subsequently increase environmental risks for humans. Environmental risks, therefore, are not only human health risks by pollution, climatic anomalies and natural disasters, but also degradation of ecosystem services on which most people are relying for their lives. We cannot entirely eliminate the risks, because it is not possible to attain zero impact on the environment, but we need to find a mechanism that minimizes environmental risks for human sustainably. This is the idea of the interdisciplinary framework of “environmental risk management” theory, which advocates harmony between economic development and environmental conservation. Based on this theory, the Sustainable Living with Environmental Risk (SLER) programme, adopted by the Japanese Ministry of Education (MEXT) as one of its strategic programmes, has been training graduate students at the Yokohama National University, Japan, from 2009 to 2013 to become future environmental leaders who will take the initiative in reducing the level of environmental risks and in protecting natural resources in the developing nations of Asia and Africa. This book provides students and teachers of this new academic field with a comprehensive coverage of case studies of environmental risks and their practical management technologies not only in Japan but also in developing nations in Asia and Africa.

Download or read book Eutrophication causes consequences and control written by Abid A. Ansari and published by Springer Science & Business Media. This book was released on 2010-10-17 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eutrophication continues to be a major global challenge to water quality scientists. The global demand on water resources due to population increases, economic development, and emerging energy development schemes has created new environmental challenges to global sustainability. Eutrophication, causes, consequences, and control provides a current account of many important aspects of the processes of natural and accelerated eutrophication in major aquatic ecosystems around the world. The connections between accelerated eutrophication and climate change, chemical contamination of surface waters, and major environmental and ecological impacts on aquatic ecosystems are discussed. Water quality changes typical of eutrophication events in major climate zones including temperate, tropical, subtropical, and arid regions are included along with current approaches to treat and control increased eutrophication around the world. The book provides many useful new insights to address the challenges of global increases in eutrophication and the increasing threats to biodiversity and water quality.