Download or read book Sediment Accumulations Patterns in the Damariscotta River Estuary written by Emily A. Chandler and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Patterns of Fine grained Sediment Accumulation in the Delaware Estuary from PB 210 and CS 137 Distributions written by Elyse Scileppi and published by . This book was released on 2004 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Accumulation of Sediment and Radionuclides in Tidal Marshes of the Murderkill River Estuary Delaware written by Dack Stuart and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines patterns and rates of sediment accumulation and tidal marsh accretion in the Murderkill River estuary, Delaware, with special emphasis placed on changes in accumulation rates and sediment physical properties associated with historical land-use practices, such as mosquito ditching. Over 90% of United States Atlantic East coast salt marshes have been ditched to some degree, but little quantitative work has been done to examine the specific effects on marsh sedimentary processes. An understanding how these ditches have affected sediment delivery to and retention on the marsh platform will provide insight into how ditched marshes are likely to respond to changes in sea level, sediment availability and vegetative growth. To investigate historical changes in sediment composition of the marsh sediment column, the specific contributions of mineral and organic solids and water/entrapped gas were determined from measurements of sediment dry-bulk density and loss-on-ignition. Additionally, grain-size analysis was conducted to determine the textural composition of sedimentary particles delivered to the marsh. Downcore profiles of the radionuclides 210Pb and 137Cs were used to determine sediment accumulation and marsh accretion rates, to develop chronologies for the sediment column, and also as indicators of sediment transport pathways within the marsh. In addition, an historical investigation was conducted to learn more about past land-use practices and sources of human disturbance in the estuarine system. Spatial and temporal variations in the relative contributions of organic and mineral matter to total sediment volume show that marsh accumulation in the Murderkill is dominated by mineral matter and that the organic contribution has varied little over the past century. At two upriver sites, changes in dry-bulk density, loss-on-ignition and grain size were observed and interpreted to correspond to the transition from freshwater marsh to brackish marsh. Although the cause of this change is unknown, it cannot be directly associated with mosquito ditching in the lower estuary due to the distance separating these sites from ditched areas. Vertical accretion rates (0.3-0.7 cm/yr) determined for undisturbed marsh sites are comparable to rates computed for other salt marshes of the greater Delaware Estuary. Radionuclide focusing factors for the marsh sites indicate that the Murderkill is a well-mixed estuary, consistent with results from a previous study of hydrodynamics of the Murderkill River. Temporal changes in accumulation (organic vs. mineral) were observed at one inter-ditch site, but the change cannot be directly associated with ditching activities because similar trends are not evident in other inter-ditch cores. Ditches filled rapidly with mineral mud after being excavated but have not matched the adjacent marsh elevation, possibly because they are acting as the preferred tidal pathways into and out of the marsh. Ditches have not significantly affected the median grain size and sorting of inter-ditch or ditch sites compared to a similarly located non-ditched location. There is no evidence to suggest ditches have deprived the marsh platform of suspended sediment in order to infill. The sedimentary record suggests that the effects of ditching on the adjacent marsh platform are subtle and not always similar among depositional sites. Thus, the results of this study suggest that there is no specific sedimentary response to ditching in ditched or non-ditched areas of the same marsh.

Download or read book Water Resources Research Catalog written by United States. Office of Water Research and Technology and published by . This book was released on 1973 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with vol. 9, only new and continuing but modified projects are listed. Vols. 8- should be kept as a record of continuing but unchanged projects.

Download or read book Water Resources Research Catalog written by and published by . This book was released on 1972 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with vol. 9, only new and continuing but modified projects are listed. Vols. 8- should be kept as a record of continuing but unchanged projects.

Download or read book Contemporary Issues in Estuarine Physics written by Arnoldo Valle-Levinson and published by Cambridge University Press. This book was released on 2010-01-28 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estuaries are of high socioeconomic importance with twenty-two of the thirty-two largest cities in the world located on river estuaries. Estuaries bring together fluxes of fresh and saline water, as well as fluvial and marine sediments, and contain high biological diversity. Increasingly sophisticated field observation technology and numerical modeling have produced significant advances in our understanding of the physical properties of estuaries over the last decade. This book introduces a classification for estuaries before presenting the basic physics and hydrodynamics of estuarine circulation and the various factors that modify it in time and space. It then covers special topics at the forefront of research such as turbulence, fronts in estuaries and continental shelves, low inflow estuaries, and implications of estuarine transport for water quality. Written by leading authorities on estuarine and lagoon hydrodynamics, this volume provides a concise foundation for academic researchers, advanced students and coastal resource managers.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1987 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Biology of Particles in Aquatic Systems Second Edition written by Roger S. Wotton and published by CRC Press. This book was released on 2020-10-29 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Biology of Particles in Aquatic Systems, Second Edition presents the latest information on particulate and dissolved matter found in aquatic habitats ranging from small streams to oceans. Only by studying this matter can we gain an understanding of the functioning of aquatic ecosystems and thus be able to predict changes that may occur as these systems become stressed. Updated and extensively revised, this new edition covers such topics as classification of particulate and dissolved matter, origin and formation of particles aquatic systems, factors affecting particle aggregation, methods for capturing particles by benthic and planktonic animals, and the use of particulate and dissolved organic matter as food.

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 The Eastern Oyster written by Victor S. Kennedy and published by University of Maryland Sea Grant Publications. This book was released on 1996 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1966 Congress passed the National Sea Grant College Program Act to promote marine research, education, and extension services in institutions along the nation's ocean and Great Lakes coasts. In Maryland a Sea Grant Program -- a partnership among federal and state governments, universities, and industries -- began in 1977, and in 1982 the University of Maryland was named the nation's seventeenth Sea Grant College. The Maryland Sea Grant College focuses its efforts on the Chesapeake Bay, with emphasis on the marine concerns of fisheries, seafood technology, and environmental quality. The first comprehensive review of the biology of the eastern oyster in more than thirty years. The twenty-one chapters synthesize every aspect of oyster biology -- for instance, general anatomy, physiology, the circulatory system, reproduction, genetics, diseases -- and issues related to management and aquaculture.

Download or read book Recruitment Colonization and Physical Chemical Forcing in Marine Biological Systems written by Susanne Baden and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 32nd European Marine Biology Symposium was held in Lysekil, Sweden on August 16-22, 1997, organised by Kristineberg Marine Research Station. The selected topics were: `Recruitment and colonisation' and `Physical and Chemical Forcing on Marine Biological Systems', partly reflecting the present research interests at Kristineberg. In this volume, recruitment and colonisation processes cover primarily the dynamics of interspecific interactions within assemblages as well as the effects of hydrodynamic variables. Both laboratory and field studies are emphasised. The contribution of papers within the topic `Physical and Chemical Forcing on Marine Biological Systems' deals with structuring effects of, for example, tides, temperatures, nutrients and hypoxia on the physiology and ecology of marine organisms. The book covers many aspects of marine life. It is our hope that the selected topics will fascinate readers and be of wide interest to students and researchers in marine biology.

Download or read book Oceanic Abstracts written by and published by . This book was released on 1997 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology of Particles in Aquatic Sys The written by Roger S. Wotton and published by Springer. This book was released on 1990-09-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Biology of Particles in Aquatic Systems, Second Edition presents the latest information on particulate and dissolved matter found in aquatic habitats ranging from small streams to oceans. Only by studying this matter can we gain an understanding of the functioning of aquatic ecosystems and thus be able to predict changes that may occur as these systems become stressed. Updated and extensively revised, this new edition covers such topics as classification of particulate and dissolved matter, origin and formation of particles aquatic systems, factors affecting particle aggregation, methods for capturing particles by benthic and planktonic animals, and the use of particulate and dissolved organic matter as food.

Download or read book Mixing in Estuaries and Coastal Seas written by Charitha Pattiaratch and published by American Geophysical Union. This book was released on 1996-01-09 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Coastal and Estuarine Studies, Volume 50. Continental shelves, coastal seas and estuaries contain many valuable resources for economic, social, tourist and recreational activity. The majority of the world's largest cities are located on the coastline. For example, 86% of the total Australian population is located in the coastal zone. Almost 75% of the global harvest of fisheries comes from coastal areas. However, it is also the region into which anthropogenic wastes are discharged, leading to degradation of the environment. As we become more aware of the consequences of these discharges, and develop new management strategies to avoid detrimental effects in estuaries and coastal regions, it is clear that an understanding of mixing processes plays a very important role in dispersion of introduced contaminants. This volume consists of 30 papers, each dealing with different aspects of mixing processes in the marine environment. The following topics are covered: inner continental shelf processes, shelf?]estuary interactions, estuarine processes, sediment transport processes, ocean outfalls, and theoretical studies. The majority of the papers include results of field experiments with some degree of integration with numerical and/or analytical models. A wide variety of environments from different countries are presented. These include micro?] and macro?]tidal environments, areas influenced by major oceanic current systems, enclosed and semi?]enclosed embayments, and mangrove environments.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1987 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Estuarine Ecosystem written by Donald S. McLusky and published by OUP Oxford. This book was released on 2004-04-29 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the inhabitants of many of the world's major towns and cities, estuaries provide their first and nearest glimpse of a natural habitat. Despite the attempts of man to pollute or reclaim it, the estuarine ecosystem continues to provide a fascinating insight into a natural world where energy is transformed from sunlight into plant material, and then through the steps of a food chain is converted into a rich food supply for birds and fish. The book provides a concise readable introduction to estuarine ecology. First published in 1981, it soon established itself as the principle textbook of choice in the UK & NW Europe. This new edition builds upon the strengths of the earlier editions but has been thoroughly revised throughout. The new co-author brings a human impact dimension to the revised book. It is written for advanced undergraduate and graduate students (particularly taught masters) who have had a general ecology course, but no further training in estuarine science. It will be useful to both professional researchers and practical managers in marine ecology and environmental science who seek a compact but comprehensive introduction to estuarine ecology.

Download or read book Ecology Abstracts written by and published by . This book was released on 1982 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes journal articles in ecology and environmental science. Nearly 700 journals are indexed in full or in part, and the database indexes literature published from 1982 to the present. Coverage includes habitats, food chains, erosion, land reclamation, resource and ecosystems management, modeling, climate, water resources, soil, and pollution.