Download or read book Resource Limitation of Phytoplankton in the Virginia Chesapeake Bay and Tributaries Using Nutrient addition Bioassays written by Leonard William Haas and published by . This book was released on 1998 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrient Limitation in the Chesapeake Bay written by Leonard William Haas and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virginia State Documents written by and published by . This book was released on 2007 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virginia Tributary Basin Specific Profiles written by and published by . This book was released on 1998 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing Multiple Indicators of Nutrient Limitation in Marine Phytoplankton on the Louisiana Continental Shelf written by and published by . This book was released on 2008 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eutrophication on the Louisiana continental shelf is driven by excess nitrogen (N) and phosphorus (P) delivered by the Mississippi River. While the eutrophication is driven primarily by excess nitrogen, scattered data going back to the early 1990's suggests that the ecosystem on the Louisiana shelf may be seasonally P-limited in the spring and early summer during high runoff periods, primarily in areas of intermediate salinity. These intermediate salinity zones are also the areas where chlorophyll biomass and primary productivity are often maximal. This production likely drives the annual bottom water hypoxia in the region, known in the popular press as the "dead zone." Three very different methods were used to address the question of nutrient limitation on the Louisiana shelf. In July 2002, a Fast Repetition Rate fluorometer (FRRf) was used in conjunction with nutrient addition bioassays and mapping of surface water parameters to examine the response of the phytoplankton community to eutrophication. In incubations, chlorophyll a biomass responded to phosphorus additions, but not those of N alone and FRRf parameters indicated a positive response to P additions in the way of higher efficiency in photosystem II. The mapping data was more heterogeneous in nature, but overall patterns indicated that P limited phytoplankton biomass. Three cruises in March, May and July 2004 were conducted in order to investigate seasonal patterns of dissolved inorganic, dissolved organic, and particulate nutrients on the Louisiana shelf. The combination of low P concentrations, high inorganic and total N:P ratios and high alkaline phosphatase activities indicated P limitation of phytoplankton biomass on the Louisiana shelf during the spring and early summer of 2004. A study of pstS, a gene induced under P-stress, revealed that its distribution in oceanic waters is related to location of the sample. The pstS gene in Synechococcus spp. taken from various sites around the world clustered on a phylogenetic tree closest to other sequences taken nearby. The combination of FRRf, nutrient data, enzyme assays and molecular markers of P-limitation strongly confirm seasonal P-limitation on the Louisiana continental shelf in the spring and early summer, driven by extreme N loads during these seasons.
Download or read book Light and Nutrient Limitation of Phytoplankton Production in the Tidal freshwater Region of the James River USA written by Brent Lederer and published by . This book was released on 2008 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1984 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eutrophication in Coastal Marine Ecosystems written by Bo Barker Jørgensen and published by . This book was released on 1996 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Successes Limitations and Frontiers in Ecosystem Science written by Michael L. Pace and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecosystem research has emerged in recent decades as a vital, successful, and sometimes controversial approach to environmental science. This book emphasizes the idea that much of the progress in ecosystem research has been driven by the emergence of new environmental problems that could not be addressed by existing approaches. By focusing on successes and limitations of ecosystems studies, the book explores avenues for future ecosystem-level research.
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.
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 Urban Stormwater Management in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-03-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Download or read book Review of the New York City Watershed Protection Program written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-12-04 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: New York City's municipal water supply system provides about 1 billion gallons of drinking water a day to over 8.5 million people in New York City and about 1 million people living in nearby Westchester, Putnam, Ulster, and Orange counties. The combined water supply system includes 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons. The city's Watershed Protection Program is intended to maintain and enhance the high quality of these surface water sources. Review of the New York City Watershed Protection Program assesses the efficacy and future of New York City's watershed management activities. The report identifies program areas that may require future change or action, including continued efforts to address turbidity and responding to changes in reservoir water quality as a result of climate change.
Download or read book Phytoplankton written by María Teresa Sebastiá and published by Nova Science Publishers. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytoplankton plays a key role in aquatic ecosystems where it is the major biomass producer. Phytoplankton is characterised by a high time-space variability which is determined by abiotic and biotic factors. In this book, the role of abiotic factors (light, temperature, nutrients, wind, hydrodynamics, CO2 and UV radiation) and biotic factors (bacteria, zooplankton, macrophytes and fish) is discussed. Anthropogenic pressure can alter those environmental factors, causing undesired changes in the composition and biomass of phytoplankton. This book emphasises the effects on water quality, but bottom sediment is also analysed. The effectiveness of management measures to restore impacted ecosystems is reviewed and ecological modelling is used as a prediction tool. In this book, the authors describe case studies in different systems such as natural lakes, reservoirs, marine systems and aquatic microcosm systems, covering a wide range of geographic areas from African tropical lakes and Brazilian subtropical lakes to peri-Alpine European lakes.
Download or read book The Water Quality Monitoring Program for the Baltimore Reservoir System 1981 2007 written by Michael T. Koterba and published by CreateSpace. This book was released on 2014-04-16 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The City of Baltimore, Maryland, and parts of five sur- rounding counties obtain their water from Loch Raven and Liberty Reservoirs. A third reservoir, Prettyboy, is used to resupply Loch Raven Reservoir. Management of the water- shed conditions for each reservoir is a shared responsibility by agreement among City, County, and State jurisdictions. The most recent (2005) Baltimore Reservoir Watershed Management Agreement (RWMA) called for continued and improved water-quality monitoring in the reservoirs and selected watershed tributaries. The U.S. Geological Survey (USGS) conducted a retrospective review of the effective- ness of monitoring data obtained and analyzed by the RWMA jurisdictions from 1981 through 2007 to help identify possible improvements in the monitoring program to address RWMA water-quality concerns.
Download or read book Methods in Stream Ecology written by F. Richard Hauer and published by Academic Press. This book was released on 2011-04-27 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods in Stream Ecology, Second Edition, provides a complete series of field and laboratory protocols in stream ecology that are ideal for teaching or conducting research. This updated edition reflects recent advances in the technology associated with ecological assessment of streams, including remote sensing. In addition, the relationship between stream flow and alluviation has been added, and a new chapter on riparian zones is also included. The book features exercises in each chapter; detailed instructions, illustrations, formulae, and data sheets for in-field research for students; and taxanomic keys to common stream invertebrates and algae. With a student-friendly price, this book is key for all students and researchers in stream and freshwater ecology, freshwater biology, marine ecology, and river ecology. This text is also supportive as a supplementary text for courses in watershed ecology/science, hydrology, fluvial geomorphology, and landscape ecology. - Exercises in each chapter - Detailed instructions, illustrations, formulae, and data sheets for in-field research for students - Taxanomic keys to common stream invertebrates and algae - Link from Chapter 22: FISH COMMUNITY COMPOSITION to an interactive program for assessing and modeling fish numbers
