Analysis of Salt Marsh Mud

Analysis of Salt Marsh Mud PDF Author: W. D. Wamer
Publisher:
ISBN:
Category : Mud
Languages : en
Pages : 3

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Analysis of Salt Marsh Mud

Analysis of Salt Marsh Mud PDF Author: W. D. Wamer
Publisher:
ISBN:
Category : Mud
Languages : en
Pages : 3

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Book Description


Dredging Coastal Ports

Dredging Coastal Ports PDF Author: National Research Council
Publisher: National Academies Press
ISBN: 0309036283
Category : Science
Languages : en
Pages : 223

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Book Description
Are the nation's ports adequate for our present and future needs? This volume points out that no significant new deep-water construction has occurred for a decade, and provides the information and analysis needed to goad the ports and the federal government into action. The book asks three questions: Is additional port construction and maintenance dredging needed now or over the next 20 years? What would prevent dredging if it is needed? What alternatives could make additional dredging possible? The book identifies several problems in dredging ports, including the long interval between a decision to deepen a port and the time the alterations are complete. The United States needs to speed port construction to meet changing needs, and the committee recommends that we prepare for future needs by dredging now.

The World of The Salt Marsh

The World of The Salt Marsh PDF Author: Charles Seabrook
Publisher: University of Georgia Press
ISBN: 0820345334
Category : Nature
Languages : en
Pages : 381

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Book Description
The World of the Salt Marsh is a wide-ranging exploration of the southeastern coast--its natural history, its people and their way of life, and the historic and ongoing threats to its ecological survival. Focusing on areas from Cape Hatteras, North Carolina, to Cape Canaveral, Florida, Charles Seabrook examines the ecological importance of the salt marsh, calling it "a biological factory without equal." Twice-daily tides carry in a supply of nutrients that nourish vast meadows of spartina ( Spartina alterniflora )--a crucial habitat for creatures ranging from tiny marine invertebrates to wading birds. The meadows provide vital nurseries for 80 percent of the seafood species, including oysters, crabs, shrimp, and a variety of finfish, and they are invaluable for storm protection, erosion prevention, and pollution filtration. Seabrook is also concerned with the plight of the people who make their living from the coast's bounty and who carry on its unique culture. Among them are Charlie Phillips, a fishmonger whose livelihood is threatened by development in McIntosh County, Georgia, and Vera Manigault of Mount Pleasant, South Carolina, a basket maker of Gullah-Geechee descent, who says that the sweetgrass needed to make her culturally significant wares is becoming scarcer. For all of the biodiversity and cultural history of the salt marshes, many still view them as vast wastelands to be drained, diked, or "improved" for development into highways and subdivisions. If people can better understand and appreciate these ecosystems, Seabrook contends, they are more likely to join the growing chorus of scientists, conservationists, fishermen, and coastal visitors and residents calling for protection of these truly amazing places.

Life and Death of the Salt Marsh

Life and Death of the Salt Marsh PDF Author: John Teal
Publisher:
ISBN:
Category : Marsh ecology
Languages : en
Pages : 296

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Book Description
"At low tide, the wind blowing across Spartina grass sounds like wind of the prairie. When the tide is in, the gentle music of moving water is added to the prairie rustle.... " One of nature's greatest gifts is the string of salt marshes that edges the East Coast from Newfoundland to Florida -- a ribbon of green growth, part solid land, part scurrying water. Life and Death of the Salt Marsh shows how these marshes are developed, what kinds of life inhabit them, how enormously they have contributed to man, and how ruthlessly man is destroying them.

The Ecology of a Salt Marsh

The Ecology of a Salt Marsh PDF Author: L. R. Pomeroy
Publisher: Springer Science & Business Media
ISBN: 1461258936
Category : Science
Languages : en
Pages : 277

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Book Description
Ecologists have two long-standing ways to study large ecosystems such as lakes, forests, and salt-marsh estuaries. In the first, which G. E. Hutchinson has called the holological approach, the whole ecosystem is first studied as a "black box," and its components are investigated as needed. In the second, which Hutchinson has called the merological approach, the parts of the system are studied first, and an attempt is then made to build up the whole from them. For long-term studies, the holological approach has special advantages, since the general patterns and tentative hypotheses that are first worked out help direct attention to the components of the system which need to be studied in greater detail. In this approach, teams of investigators focus on major func tions and hypotheses and thereby coordinate their independent study efforts. Thus, although there have been waves, as it were, of investigators and graduate students working on different aspects of the Georgia salt-marsh estuaries (personnel at the Marine Institute on Sapelo Island changes every few years), the emphasis on the holo logical approach has resulted in a highly differentiated and well-coordinated long-term study. Very briefly, the history of the salt-marsh studies can be outlined as follows. First, the general patterns of food chains and other energy flows in the marshes and creeks were worked out, and the nature of imports and exports to and from the system and its subsystems were delimited.

Building Salt Marshes Along the Coasts of the Continental United States

Building Salt Marshes Along the Coasts of the Continental United States PDF Author: William Walton Woodhouse (Jr.)
Publisher:
ISBN:
Category : Marsh ecology
Languages : en
Pages : 100

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Book Description
This is the first comprehensive report on coastal marsh creation in the United States. It provides potential users with an analysis and interpretation of the available information on this subject. The role of marshes, the feasibility of marsh creation, and the effects of elevation, salinity, slope, exposure, and soils on marsh establishment are discussed. Plants suitable for marsh building are described by the major regions. Plant propagation, planting, fertilization, and management of the major plants are discussed. Labor and material requirements for marsh creation are summarized. Keywords: Coastal engineering; Gulf coast; Planting; East Coast; West Coast; Grasses; Wetland plants; Transplantation; Sediment accumulation; Marsh soils; Florida; Marsh building; Marsh vegetation; Stabilization. (EDC)

Pesticides Monitoring Journal

Pesticides Monitoring Journal PDF Author:
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 472

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A Guide to Modeling Coastal Morphology

A Guide to Modeling Coastal Morphology PDF Author: Dano Roelvink
Publisher: World Scientific
ISBN: 9814304255
Category : Science
Languages : en
Pages : 291

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Book Description
Process-based morphodynamic modelling is one of the relatively new tools at the disposal of coastal scientists, engineers and managers. On paper, it offers the possibility to analyse morphological processes and to investigate the effects of various measures one might consider to alleviate some problems. For these to be applied in practice, a model should be relatively straightforward to set up. It should be accurate enough to represent the details of interest, it should run long enough and robustly to see the real effects happen, and the physical processes represented in such a way that the sediment generally goes in the right direction at the right rate. Next, practitioners must be able to judge if the patterns and outcomes of the model are realistic and finally, translate these colour pictures and vector plots to integrated parameters that are relevant to the client or end user. In a nutshell, this book provides an in-depth review of ways to model coastal processes, including many hands-on exercises.

A Volumetric Analysis of Holocene Sediments Underlying Present Delaware Salt Marshes Inundated by Delaware Bay Tides

A Volumetric Analysis of Holocene Sediments Underlying Present Delaware Salt Marshes Inundated by Delaware Bay Tides PDF Author: Alan Richter
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 140

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Concepts and Controversies in Tidal Marsh Ecology

Concepts and Controversies in Tidal Marsh Ecology PDF Author: M.P. Weinstein
Publisher: Springer Science & Business Media
ISBN: 0792360192
Category : Nature
Languages : en
Pages : 862

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Book Description
Tidal salt marshes are viewed as critical habitats for the production of fish and shellfish. As a result, considerable legislation has been promulgated to conserve and protect these habitats, and much of it is in effect today. The relatively young science of ecological engineering has also emerged, and there are now attempts to reverse centuries-old losses by encouraging sound wetland restoration practices. Today, tens of thousands of hectares of degraded or isolated coastal wetlands are being restored worldwide. Whether restored wetlands reach functional equivalency to `natural' systems is a subject of heated debate. Equally debatable is the paradigm that depicts tidal salt marshes as the `great engine' that drives much of the secondary production in coastal waters. This view was questioned in the early 1980s by investigators who noted that total carbon export, on the order of 100 to 200 g m-2 y-1 was of much lower magnitude than originally thought. These authors also recognized that some marshes were either net importers of carbon, or showed no net exchange. Thus, the notion of `outwelling' has become but a single element in an evolving view of marsh function and the link between primary and secondary production. The `revisionist' movement was launched in 1979 when stable isotopic ratios of macrophytes and animal tissues were found to be `mismatched'. Some eighteen years later, the view of marsh function is still undergoing additional modification, and we are slowly unraveling the complexities of biogeochemical cycles, nutrient exchange, and the links between primary producers and the marsh/estuary fauna. Yet, since Teal's seminal paper nearly forty years ago, we are not much closer to understanding how marshes work. If anything, we have learned that the story is far more complicated than originally thought. Despite more than four decades of intense research, we do not yet know how salt marshes function as essential habitat, nor do we know the relative contributions to secondary production, both in situ or in the open waters of the estuary. The theme of this Symposium was to review the status of salt marsh research and revisit the existing paradigm(s) for salt marsh function. Challenge questions were designed to meet the controversy head on: Do marshes support the production of marine transient species? If so, how? Are any of these species marsh obligates? How much of the production takes place in situ versus in open waters of the estuary/coastal zone? Sessions were devoted to reviews of landmark studies, or current findings that advance our knowledge of salt marsh function. A day was also devoted to ecological engineering and wetland restoration papers addressing state-of-the-art methodology and specific case histories. Several challenge papers arguing for and against our ability to restore functional salt marshes led off each session. This volume is intended to serve as a synthesis of our current understanding of the ecological role of salt marshes, and will, it is hoped, pave the way for a new generation of research.