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Assessing The Use Of Stable Isotopes To Monitor Anthropogenic Nitrogen Inputs To Estuarine Systems
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Book Synopsis Assessing the Use of Stable Isotopes to Monitor Anthropogenic Nitrogen Inputs to Estuarine Systems by : Rebecca O. Bannon
Download or read book Assessing the Use of Stable Isotopes to Monitor Anthropogenic Nitrogen Inputs to Estuarine Systems written by Rebecca O. Bannon and published by . This book was released on 2006 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Expanding the History of Estuarine Nitrogen Load and Source by : Lena Kae Champlin
Download or read book Expanding the History of Estuarine Nitrogen Load and Source written by Lena Kae Champlin and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eutrophication from anthropogenic nitrogen (N) pollution is a prevalent threat to estuaries globally, however challenges of assessing eutrophication persist. Direct measurement of N levels may not capture highly dynamic diel, seasonal, and spatial patterns and cannot distinguish sources from terrestrial runoff vs. background marine inputs. Furthermore, the lack of long-term data to establish N baselines complicates regulatory efforts. This dissertation examines proxies of nutrient dynamics over multiple decades, centuries, and millenniums in a central Californian estuary, Elkhorn Slough, where agriculture dramatically enhanced nutrient inputs during the past century. First, multidecadal datasets spanning 20 years were used to investigate temporal cycles and spatial patterns of water quality. In addition to previously recognized impacts of eutrophication on hypoxia, emerging research has found the compounding impact of N pollution on pH trends caused by rising anthropogenic CO2. Therefore, in Chapter 1, the effect of local nutrient sources on acidification was modeled using 20 years of monitoring data and patterns of aragonite saturation. Results revealed pronounced acidification trends near the marine inlet, however, large cycles from ecosystem metabolism were observed to also drive drops of pH in tidally restricted areas. Next, in Chapter 2, stable isotope analysis and maps (isoscapes) spanning ~300 years were used to assess marine vs. terrestrial N sources. Comparisons of contemporary verses historical isoscapes (ca. 1900) from sediment cores revealed that N sources shifted from a historical gradient with heavier isotopes near the marine endmember to a spatial pattern of amplified N levels at both the head and mouth of the modern estuary. Additionally, isotopes in the shells of modern bivalves Mytilus and Ostrea, suspended particulates, and nitrate showed enrichment further landward from the marine inlet indicative of a watershed N source. Geospatial analysis of historical records suggests that an increase in fertilizer application is chiefly responsible for this signal of increased nitrogen during the 20th century. Strong contrasts were observed between current sediment stable isotopes and those from the recent past (~150 years), demonstrating baseline shifts exceeding those in previously studied eutrophic estuaries. Finally, in Chapter 3, [delta]15N, [delta]13C and [delta]18O in bivalve shells spanning ~1500 years showed greater changes of nutrient sources during the past century (1933 - 1999 C.E.) than the proceeding millennium (ca. 630 - 1830 C.E.). This dissertation demonstrates the ability of using multiple parameters including pH and aragonite saturation, isoscapes from sediments, and isotopes in historical bivalve shells, to provide important perspectives on spatial patterns and long-term shifts of eutrophication.
Book Synopsis Application of Nitrogen Stable Isotopes to Identify Sources of Nutrient Pollution by : Elizabeth A. Redon
Download or read book Application of Nitrogen Stable Isotopes to Identify Sources of Nutrient Pollution written by Elizabeth A. Redon and published by . This book was released on 2001 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrient pollution may perhaps be one of the oldest water quality problems and has recently been considered as one of the greatest threats to estuarine and coastal waters. Excessive nutrient loads have had a vast array of impacts on estuarine and coastal ecosystems globally. Direct negative effects include: shading out of benthic plant communities, hypoxia and anoxia due to increased biological oxygen demand, compositional change in plant and fauna! community structure and increased occurrences of harmful algal blooms. This has lead to decreased biodiversity, habitat, fisheries, tourism and aesthetics. So far environmental managers have had to rely on a posteriori assessments of the status of nutrient pollution, using indicators such as taxonomic shifts and changes in biological abundance, which have already occurred. By the time nutrient pollution is detected, restoration of habitats is costly and sometimes no longer an option. Therefore, there is a need for management tools to assess sources of nutrient loads before damage to estuarine and coastal ecosystems progresses beyond recovery. Early work using stable isotopes of dissolved inorganic nitrogen in groundwater samples demonstrated the potential for using stable isotopes to identify anthropogenic sources of nitrogen. These studies revealed that nitrogen sources such as fertilizers, soil organic nitrogen and wastewater nitrogen have isotopically distinct signatures that could be used to assess anthropogenic nitrogen contributions. Therefore, application of nitrogen stable isotope methods could potentially provide information on the anthropogenic nitrogen sources stimulating nutrient pollution in estuarine and coastal waters. However, when I assessed this approach for application, two sources of errors became apparent. First, laboratory isolation of dissolved inorganic nitrate from seawater delivered results depleted in 15N relative to the standard used to assess the method. Second, isotopic fractionation associated with nitrogen cycle processes complicates usage of an isotopic mass balance to solve for the nitrogen source and its fractional contribution based on isotopic data alone. As a result, isotopic analysis alone of dissolved inorganic nitrogen to determine anthropogenic sources of nutrient loads to estuarine and coastal waters is not a practical approach to obtain management information concerning nutrient pollution.
Book Synopsis Stable Isotopes in Ecology and Environmental Science by : Robert Michener
Download or read book Stable Isotopes in Ecology and Environmental Science written by Robert Michener and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights new and emerging uses of stable isotope analysis in a variety of ecological disciplines. While the use of natural abundance isotopes in ecological research is now relatively standard, new techniques and ways of interpreting patterns are developing rapidly. The second edition of this book provides a thorough, up-to-date examination of these methods of research. As part of the Ecological Methods and Concepts series which provides the latest information on experimental techniques in ecology, this book looks at a wide range of techniques that use natural abundance isotopes to: follow whole ecosystem element cycling understand processes of soil organic matter formation follow the movement of water in whole watersheds understand the effects of pollution in both terrestrial and aquatic environments study extreme systems such as hydrothermal vents follow migrating organisms In each case, the book explains the background to the methodology, looks at the underlying principles and assumptions, and outlines the potential limitations and pitfalls. Stable Isotopes in Ecology and Environmental Science is an ideal resource for both ecologists who are new to isotopic analysis, and more experienced isotope ecologists interested in innovative techniques and pioneering new uses.
Book Synopsis Funding the Natural Resource Challenge, a Report to Congress, Fiscal Year ... by : United States. National Park Service
Download or read book Funding the Natural Resource Challenge, a Report to Congress, Fiscal Year ... written by United States. National Park Service and published by . This book was released on with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotope Ecology by : Brian Fry
Download or read book Stable Isotope Ecology written by Brian Fry and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: A solid introduction to stable isotopes that can also be used as an instructive review for more experienced researchers and professionals. The book approaches the use of isotopes from the perspective of ecological and biological research, but its concepts can be applied within other disciplines. A novel, step-by-step spreadsheet modeling approach is also presented for circulating tracers in any ecological system, including any favorite system an ecologist might dream up while sitting at a computer. The author’s humorous and lighthearted style painlessly imparts the principles of isotope ecology. The online material contains color illustrations, spreadsheet models, technical appendices, and problems and answers.
Book Synopsis Stable Isotopes in Ecological Research by : P.W. Rundel
Download or read book Stable Isotopes in Ecological Research written by P.W. Rundel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of stable isotope ratios represents one of the most exciting new technical advances in environmental sciences. In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal metabolism - biogeochemical fluxes. Extensive coverage is given to natural isotopes of carbon, hydrogen, oxygen, nitrogen, sulfur, and strontium in both terrestrial and marine ecosystems. Ecologists of diverse research interests, as well as agronomists, anthropologists, and geochemists will value this overview for its wealth of information on theoretical background, experimental approaches, and technical design of studies utilizing stable isotope ratios.
Book Synopsis Stable Isotope Techniques in the Study of Biological Processes and Functioning of Ecosystems by : M.J. Unkovich
Download or read book Stable Isotope Techniques in the Study of Biological Processes and Functioning of Ecosystems written by M.J. Unkovich and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades technological advances in isotope ratio mass spectrometry have been very rapid, opening up new possibilities for analysis of biological and environmental materials. The new instrumentation has facilitated faster analysis of samples via automated sample preparation and multi-isotope analysis of single samples, resulting in considerable cost savings, and enabling access to isotope analysis for many more researchers. These changes are reflected in the rapidly growing international literature on stable isotopes. While there have been some excellent books and review papers aimed at interpreting isotope signals in biology and environmental science, there have been fewer attempts to provide practical tools for researchers making forays into this exciting new arena. This book aims to address this inadequacy by providing a set of practical guidelines for the application of a range of novel and well proven stable isotope techniques to the fields of plant physiological ecology, agriculture, marine ecology and palaeoecology. The book is the outcome of a weeklong workshop held under the auspices of the Cooperative Research Centre for Legumes in Mediterranean Agriculture (CLIMA 1992 - 2000) at The University of Western Australia and the CSIRO Floreat Laboratories, Perth, Western Australia, in February 1999. The workshop was designed to provide practical tools and experiences for researchers and students concerned with how one goes about using stable isotopes in field investigations.
Book Synopsis Stable Isotopes in Ecological Research by : Philip Rundel
Download or read book Stable Isotopes in Ecological Research written by Philip Rundel and published by Springer. This book was released on 1988-11-16 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of stable isotope ratios represents one of the most exciting new technical advances in environmental sciences. In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal metabolism - biogeochemical fluxes. Extensive coverage is given to natural isotopes of carbon, hydrogen, oxygen, nitrogen, sulfur, and strontium in both terrestrial and marine ecosystems. Ecologists of diverse research interests, as well as agronomists, anthropologists, and geochemists will value this overview for its wealth of information on theoretical background, experimental approaches, and technical design of studies utilizing stable isotope ratios.
Book Synopsis Isotope Tracers in Catchment Hydrology by : C. Kendall
Download or read book Isotope Tracers in Catchment Hydrology written by C. Kendall and published by Elsevier. This book was released on 2012-12-02 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a new "earth systems" approach to catchments that encompasses the physical and biogeochemical interactions that control the hydrology and biogeochemistry of the system. The text provides a comprehensive treatment of the fundamentals of catchment hydrology, principles of isotope geochemistry, and the isotope variability in the hydrologic cycle -- but the main focus of the book is on case studies in isotope hydrology and isotope geochemistry that explore the applications of isotope techniques for investigating modern environmental problems. Isotope Tracers in Catchment Hydrology is the first synthesis of physical hydrology and isotope geochemistry with catchment focus, and is a valuable reference for professionals and students alike in the fields of hydrology, hydrochemistry, and environmental science. This important interdisciplinary text provides extensive guidelines for the application of isotope techniques for all investigatores facing the challenge of protecting precious water, soil, and ecological resources from the ever-increasing problems associated with population growth and environmental change, including those from urban development and agricultural land uses.
Book Synopsis A Stable Isotopic Assessment of the Inorganic Nitrogen Input to the Ground Water Near an Agricultural Area of Eastern Virginia by : Robert John Tapper
Download or read book A Stable Isotopic Assessment of the Inorganic Nitrogen Input to the Ground Water Near an Agricultural Area of Eastern Virginia written by Robert John Tapper and published by . This book was released on 1995 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Isotope Techniques for Assessing Nutrient Dynamics in River Basins by : International Atomic Energy Agency
Download or read book Application of Isotope Techniques for Assessing Nutrient Dynamics in River Basins written by International Atomic Energy Agency and published by IAEA Tecdoc. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the application of isotope techniques as a tool for evaluating nutrient dynamics in river systems. The book shows that the application of isotope techniques could enable or facilitate the examination of sources, pathways, transformations, and fates of nutrients in river systems, contributing to integrated water resource management.
Book Synopsis The Indian Nitrogen Assessment by : Yash P. Abrol
Download or read book The Indian Nitrogen Assessment written by Yash P. Abrol and published by Elsevier. This book was released on 2017-08-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indian Nitrogen Assessment: Sources of Reactive Nitrogen, Environmental and Climate Effects, and Management Options and Policies provides a reference for anyone interested in Reactive N, from researchers and students, to environmental managers. Although the main processes that affect the N cycle are well known, this book is focused on the causes and effects of disruption in the N cycle, specifically in India. The book helps readers gain a precise understanding of the scale of nitrogen use, misuse, and release through various agricultural, industrial, vehicular, and other activities, also including discussions on its contribution to the pollution of water and air. Drawing upon the collective work of the Indian Nitrogen Group, this reference book helps solve the challenges associated with providing reliable estimates of nitrogen transfers within different ecosystems, also presenting the next steps that should be taken in the development of balanced, cost-effective, and feasible strategies to reduce the amount of reactive nitrogen. Identifies all significant sources of reactive nitrogen flows and their contribution to the nitrogen-cycle on a national, regional, and global level Covers nitrogen management across sectors, including the environment, food security, energy, and health Provides a single reference on reactive nitrogen in India to help in a number of activities, including the evaluation, analysis, synthesis, documentation, and communications on reactive nitrogen
Book Synopsis Assessing the Fate of Dissolved Inorganic Nitrogen in the Qishon Estuary (Israel), by Means of Nitrate Stable Isotopes by : Efrat Eliani-Russak
Download or read book Assessing the Fate of Dissolved Inorganic Nitrogen in the Qishon Estuary (Israel), by Means of Nitrate Stable Isotopes written by Efrat Eliani-Russak and published by . This book was released on 2010 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estuarine Ecology by : John W. Day, Jr.
Download or read book Estuarine Ecology written by John W. Day, Jr. and published by John Wiley & Sons. This book was released on 2012-11-19 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estuaries are among the most biologically productive ecosystems on the planet--critical to the life cycles of fish, other aquatic animals, and the creatures which feed on them. Estuarine Ecology, Second Edition, covers the physical and chemical aspects of estuaries, the biology and ecology of key organisms, the flow of organic matter through estuaries, and human interactions, such as the environmental impact of fisheries on estuaries and the effects of global climate change on these important ecosystems. Authored by a team of world experts from the estuarine science community, this long-awaited, full-color edition includes new chapters covering phytoplankton, seagrasses, coastal marshes, mangroves, benthic algae, Integrated Coastal Zone Management techniques, and the effects of global climate change. It also features an entriely new section on estuarine ecosystem processes, trophic webs, ecosystem metabolism, and the interactions between estuaries and other ecosystems such as wetlands and marshes
Book Synopsis Monitored Natural Attenuation of Inorganic Contaminants in Ground Water by :
Download or read book Monitored Natural Attenuation of Inorganic Contaminants in Ground Water written by and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.
Book Synopsis Nitrogen in the Marine Environment by : Edward J. Carpenter
Download or read book Nitrogen in the Marine Environment written by Edward J. Carpenter and published by Elsevier. This book was released on 2013-10-22 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen in the Marine Environment provides information pertinent to the many aspects of the nitrogen cycle. This book presents the advances in ocean productivity research, with emphasis on the role of microbes in nitrogen transformations with excursions to higher trophic levels. Organized into 24 chapters, this book begins with an overview of the abundance and distribution of the various forms of nitrogen in a number of estuaries. This text then provides a comparison of the nitrogen cycling of various ecosystems within the marine environment. Other chapters consider chemical distributions and methodology as an aid to those entering the field. This book discusses as well the enzymology of the initial steps of inorganic nitrogen assimilation. The final chapter deals with the philosophy and application of modeling as an investigative method in basic research on nitrogen dynamics in coastal and open-ocean marine environments. This book is a valuable resource for plant biochemists, microbiologists, aquatic ecologists, and bacteriologists.
