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Articles 2431 - 2460 of 4602

Full-Text Articles in Physical Sciences and Mathematics

Monitoring Relative Abundance Of American Shad In Virginia Rivers 2004 Annual Report, John E. Olney Apr 2005

Monitoring Relative Abundance Of American Shad In Virginia Rivers 2004 Annual Report, John E. Olney

Reports

Concern about the decline in landings of American shad (Alosa sapidissima) along the Atlantic coast prompted the development of an interstate fisheries management plan (FMP) under the auspices of the Atlantic States Marine Fisheries Management Program (ASMFC 1999). Legislation enables imposition of federal sanctions on fishing in those states that fail to comply with the FMP. To be in compliance, coastal states are required to implement and maintain fishery-dependent and fishery-independent monitoring programs as specified by the FMP. For Virginia, these requirements include spawning stock assessments, the collection of biological data on the spawning run (e.g., age-structure, sex ratio, and …


The Virginia Wetlands Report Vol. 20, No. 1, Virginia Institute Of Marine Science Mar 2005

The Virginia Wetlands Report Vol. 20, No. 1, Virginia Institute Of Marine Science

Virginia Wetlands Reports

  • Clapper Rail (Rallus longirostris). Julie Bradshaw
  • Tidal Wetlands Seminar Draws Crowd
  • Annual Summary of Permitted Tidal Wetland Impacts - 2004. Karen Duhring
  • Take a Wetland to Lunch…. Or Take your Lunch to a Wetland Pam Mason
  • A Level I Protocol for Assessing Wetland Condition by Hydrologic Unit within the Coastal Plain. Kirk Havens


Input Of Particulate Organic And Dissolved Inorganic Carbon From The Amazon To The Atlantic Ocean, Erm Druffel, Je Bauer, S Griffin Mar 2005

Input Of Particulate Organic And Dissolved Inorganic Carbon From The Amazon To The Atlantic Ocean, Erm Druffel, Je Bauer, S Griffin

VIMS Articles

We report concentrations and isotope measurements (radiocarbon and stable carbon) of dissolved inorganic carbon (DIC) and suspended particulate organic carbon (POC) in waters collected from the mouth of the Amazon River and the North Brazil Current. Samples were collected in November 1991, when the Amazon hydrograph was at its annual minimum and the North Brazil Current had retroflected into the equatorial North Atlantic. The DIC D 14 C results revealed postbomb carbon in river and ocean waters, with slightly higher values at the river mouth. The low DIC delta(13)C signature of the river end-member (-11%) demonstrates that about half of …


Convenient Synthesis Of Copper (I) Thiolates And Related Compounds, Lynda M. Nguyen, Megan E. Dellinger, Jeffrey T. Lee, Ronald A. Quinlan, Arnold L. Rheingold, Robert D. Pike Mar 2005

Convenient Synthesis Of Copper (I) Thiolates And Related Compounds, Lynda M. Nguyen, Megan E. Dellinger, Jeffrey T. Lee, Ronald A. Quinlan, Arnold L. Rheingold, Robert D. Pike

Arts & Sciences Articles

Copper (I) salts of various anions including thiolates, diethyl dithiocarbamate, diethyl dithiophosphate, trithiocyanurate, 1-cyano-3-methylisothiourea, 2-aminothiazole, and tetrakis(1-imidazolyl)borate are conveniently synthesized by reducing copper (II) sulfate in aqueous ammonia. The addition of phosphine ligands to several of the products is demonstrated, and the crystal structure of [Cu2(MBT)2(DPPE)3] · Et2O (MBT = 2-mercaptobenzothiazolate, DPPE = 1,2-bis(diphenylphosphino)ethane) is reported.


Status Of The Major Oyster Diseases In Virginia 2004 A Summary Of The Annual Monitoring Program, Ryan Carnegie, Eugene M. Burreson Mar 2005

Status Of The Major Oyster Diseases In Virginia 2004 A Summary Of The Annual Monitoring Program, Ryan Carnegie, Eugene M. Burreson

Reports

2004 was the second very wet year in a row. While rainfall and streamflows were normal in winter and early spring, and just slightly above average during the summer, the fall of 2004 was nearly as wet as the year before. Salinities were again depressed throughout the lower Bay. Water temperatures were below normal during the winter, but typical otherwise. Low salinities and, in the winter, temperatures brought continued abatement in the oyster diseases caused by Perkinsus marinus (Dermo) and Haplosporidium nelsoni (MSX). Among quarterly James River Survey sites, maximum annual P. marinus prevalences were the lowest they had been …


An Unprecedented Scientific Community Response To An Unprecedented Event: Tropical Storm Agnes And The Chesapeake Bay, M. P. Lynch Jan 2005

An Unprecedented Scientific Community Response To An Unprecedented Event: Tropical Storm Agnes And The Chesapeake Bay, M. P. Lynch

VIMS Books and Book Chapters

In June 1972, the remnants of Hurricane Agnes brought destructive floods to the watershed of the Chesapeake Bay basin. Unlike Hurricane Isabel, Agnes did not strike Chesapeake Bay directly, but deposited a record amount of rainfall on the watershed. The evening that the Agnes rainfall began in earnest coincided with a meeting of the Citizens Program for the Chesapeake Bay. The directors of the three largest Chesapeake Bay research institutions, Drs. Donald W. Pritchard, L. Eugene Cronin, and William J. Hargis Jr., were in attendance at this meeting. The potential magnitude of the Agnes rainfall was readily apparent at the …


Isabel's Silent Partners: Seasonal And Secular Sea Level Change, J. D. Boon Jan 2005

Isabel's Silent Partners: Seasonal And Secular Sea Level Change, J. D. Boon

VIMS Books and Book Chapters

Tidal conditions fail to explain a paradoxical similarity in water level extremes induced by Hurricane Isabel on 18 September 2003, and the 23 August 1933 storm of record at Hampton Roads, Virginia. Storm surge peaks occurred near astronomical high tide during both storms, but Isabel arrived during neap tides while tides during the 1933 storm were nearer to spring. In addition, Isabel produced a lesser storm surge, yet she yielded a storm tide, or high-water mark, roughly equal to that of the 1933 hurricane. The answer to the paradox lies in observed sea level—water level measured relative to the land—and …


What Has Been Learned About Storm Surge Dynamics From Hurricane Isabel Model Simulation?, Harry V. Wang, J. Cho, Jian Shen, Y. P. Wang Jan 2005

What Has Been Learned About Storm Surge Dynamics From Hurricane Isabel Model Simulation?, Harry V. Wang, J. Cho, Jian Shen, Y. P. Wang

VIMS Books and Book Chapters

An unstructured grid hydrodynamic model was used to study storm surge in the Chesapeake Bay during Hurricane Isabel. The model-simulated, storm-induced water level compared reasonably well with the measured data collected around the Bay. Calibrated water level was extracted from the model to further analyze the dynamics of the surge as it formed and propagated along the mainstem Chesapeake. Based on time-series analysis, formation of the surge due to the pumping of coastal waters (hereafter called the primary surge) into the Chesapeake was first identified at the Bay mouth with a peak height of 1.5 m above mean sea level …


2005 Hampton Roads Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans Jan 2005

2005 Hampton Roads Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.


2005 Gloucester Point Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans Jan 2005

2005 Gloucester Point Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.


2005 Chesapeake Bay Bridge Tunnel Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans Jan 2005

2005 Chesapeake Bay Bridge Tunnel Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.


Marine Research Building Complex, Virginia Institute Of Marine Science, College Of William And Mary Jan 2005

Marine Research Building Complex, Virginia Institute Of Marine Science, College Of William And Mary

Miscellaneous

No abstract provided.


2005 Wachapreague Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans Jan 2005

2005 Wachapreague Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.


Development Of The Maryland Shoreline Inventory Methods And Guidelines For Queen Anne’S County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss Jan 2005

Development Of The Maryland Shoreline Inventory Methods And Guidelines For Queen Anne’S County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss

Data

The Center for Coastal Resources Management (CCRM) at the Virginia Institute of Marine Science (VIMS) has generated Shoreline Situation Reports (SSRs) for coastal localities in the state of Maryland. This effort compliments a parallel effort in Virginia by the same group. SSRs were developed by VIMS in the 1970s for Virginia and have been the foundation for shoreline management planning in Tidewater Virginia ever since. CCRM has developed new protocols for collecting, disseminating, and reporting data relevant to shoreline management issues using state of the art mapping and remote sensing techniques. New SSRs are being generated on a county by …


A New Approach To The Synthesis Of Pvc Graft Copolymers, Guangde Chen Jan 2005

A New Approach To The Synthesis Of Pvc Graft Copolymers, Guangde Chen

Dissertations, Theses, and Masters Projects

No abstract provided.


Meiofauna Abundance And Distribution In Chesapeake Bay: Relationships With Environmental Stressors, Sediment Toxicity And Macrofauna, William J. Metcalfe Jan 2005

Meiofauna Abundance And Distribution In Chesapeake Bay: Relationships With Environmental Stressors, Sediment Toxicity And Macrofauna, William J. Metcalfe

Dissertations, Theses, and Masters Projects

Macrofauna-based biocriteria to assess impairment in aquatic communities are well-developed and have been widely accepted as useful for coastal monitoring programs worldwide. Meiofauna-based methods are not as well developed, but meiofauna are intimately associated with sediments through their life cycles and are functionally important. Thus, an understanding of meiofauna relationships with environmental quality is also important. Relationships between the abundance and composition of major meiofauna taxa for two shallow water habitat types (protected, with muddy sediment; exposed, with sandy sediment) were investigated along gradients associated with changing land use, sediment contamination and environmental stressors in Chesapeake Bay. Principal component analysis …


Distinguishing Sediment Transport Modes To The Outer-Shelf Off The Waiapu River, New Zealand, Lisa D. Addington Jan 2005

Distinguishing Sediment Transport Modes To The Outer-Shelf Off The Waiapu River, New Zealand, Lisa D. Addington

Dissertations, Theses, and Masters Projects

No abstract provided.


Shoreline Evolution Chesapeake Bay And Piankatank River Shorelines Mathews County, Va, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas Jan 2005

Shoreline Evolution Chesapeake Bay And Piankatank River Shorelines Mathews County, Va, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas

Reports

Shoreline evolution is the change in shore position through time. In fact, it is the material resistance of the coastal geologic underpinnings against the impinging hydrodynamic (and aerodynamic) forces. Along the shores of Chesapeake Bay, it is a process-response system. The processes at work include winds, waves, tides and currents, which shape and modify coastlines by eroding, transporting and depositing sediments. The shore line is commonly plotted and measured to provide a rate of change but it is as important to understand the geomorphic patterns of change. Shore analysis provides the basis to know how a particular coast has changed …


Site Fidelity, Home Range, And Daily Movements Of White Perch, Morone Americana, And Striped Bass, Morone Saxatilis, In Two Small Tributaries Of The York River, Virginia, Patrick E. Mcgrath Jan 2005

Site Fidelity, Home Range, And Daily Movements Of White Perch, Morone Americana, And Striped Bass, Morone Saxatilis, In Two Small Tributaries Of The York River, Virginia, Patrick E. Mcgrath

Dissertations, Theses, and Masters Projects

Striped bass (Morone saxatilis) and white perch (M. americana) are two common species residing within Chesapeake Bay and its tributaries. These congeners are both commercially and recreationally important species. White perch are permanent residents in the Bay, while striped bass are only residents during the first few years of their life. During these initial years, striped bass co-occur with white perch. There is very little known about white perch and resident striped bass site fidelity and home range. This acoustic tagging study aims to examine site fidelity and home range of both species and determine if there is any spatial …


Physical Response Of The York River Estuary To Hurricane Isabel, L. H. Brasseur, A. C. Trembanis, J. M. Brubaker, Carl T. Friedrichs Jan 2005

Physical Response Of The York River Estuary To Hurricane Isabel, L. H. Brasseur, A. C. Trembanis, J. M. Brubaker, Carl T. Friedrichs

VIMS Books and Book Chapters

After making landfall on the North Carolina coast on the morning of 18 September 2003, Category 2 Hurricane Isabel tracked northward parallel to and slightly west of the Chesapeake Bay. At Gloucester Point, near the mouth of the York River estuary, strong onshore winds with speeds in excess of 20 m⋅s-1 persisted for over 12 hours and peak winds reached over 40 m⋅s-1, causing a sustained up-estuary wind stress. Storm surge exceeded 2 m throughout most of the lower Chesapeake Bay. A 600 kHz acoustic Doppler current profiler (ADCP), deployed at a depth of 8.5 m off Gloucester Point, provided …


Effects Of Hurricanes On Atlantic Croaker (Micropogonias Undulatus) Recruitment To Chesapeake Bay, M. M. Montane, H. M. Austin Jan 2005

Effects Of Hurricanes On Atlantic Croaker (Micropogonias Undulatus) Recruitment To Chesapeake Bay, M. M. Montane, H. M. Austin

VIMS Books and Book Chapters

Few studies have focused on the effects of climatic perturbations, such as hurricanes, on finfish recruitment and behavior. The Virginia Institute of Marine Science (VIMS) Trawl Survey has sampled continuously throughout the Virginia portion of Chesapeake Bay for 50 years. While hurricanes have impacted Chesapeake Bay during this time, three periods of hurricane activity— September and November 1985 (hurricanes Gloria and Juan), September 1989 (Hurricane Hugo), and September 2003 (Hurricane Isabel)—coincided with the largest spikes in juvenile recruitment of Atlantic croaker (Micropogonias undulatus) for half a century. The fall (October–December) croaker young-of-year indices for 1985, 1989, and 2003 were seven, …


Impacts Of Tropical Cyclone Isabel On Shallow Water Quality Of The York River Estuary, W. G. Reay, Ken Moore Jan 2005

Impacts Of Tropical Cyclone Isabel On Shallow Water Quality Of The York River Estuary, W. G. Reay, Ken Moore

VIMS Books and Book Chapters

Water quality impacts from Tropical Cyclone Isabel on the York River estuary were assessed based on long-term, near-continuous, shallowwater monitoring stations along the York River proper (poly- and mesohaline regimes) and its two tidal tributaries—the Mattaponi and Pamunkey rivers (oligohaline and tidal freshwater regimes). Regional rainfall from 18 to 19 September 2003 ranged from 5.8 to 11.7 cm. Peak mean daily stream flow occurred on 21 September 2003 and represented a 20- and 30-fold increase over prestorm conditions on the Mattaponi and Pamunkey rivers, respectively. Isabel produced a storm surge of 1.7 m near the mouth of the estuary and …


Simulation Of Hurricane Isabel Using The Advanced Circulation Model (Adcirc), Jian Shen, W. Gong, Harry V. Wang Jan 2005

Simulation Of Hurricane Isabel Using The Advanced Circulation Model (Adcirc), Jian Shen, W. Gong, Harry V. Wang

VIMS Books and Book Chapters

Hurricane Isabel made landfall near Drum Inlet, about 240 km south of the Chesapeake Bay mouth, on the Outer Banks of North Carolina at 17:00 UTC (GMT 12:00), 18 September 2003. Hurricane Isabel is considered one of the most significant tropical cyclones to affect portions of northeastern North Carolina and east-central Virginia. The ADvanced CIRCulation Model (ADCIRC) model was applied to the Chesapeake Bay to simulate Hurricane Isabel. High-resolution grids were placed inside the Bay and tributaries; coarse grids were placed outside the Bay. The spatial grid resolution in the Bay mainstem is about 200–1000 m and the spatial grid …


Development Of The Maryland Shoreline Inventory Methods And Guidelines For Charles County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss Jan 2005

Development Of The Maryland Shoreline Inventory Methods And Guidelines For Charles County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss

Data

The Center for Coastal Resources Management (CCRM) at the Virginia Institute of Marine Science (VIMS) has generated Shoreline Situation Reports (SSRs) for coastal localities in the state of Maryland. This effort compliments a parallel effort in Virginia by the same group. SSRs were developed by VIMS in the 1970s for Virginia and have been the foundation for shoreline management planning in Tidewater Virginia ever since. CCRM has developed new protocols for collecting, disseminating, and reporting data relevant to shoreline management issues using state of the art mapping and remote sensing techniques. New SSRs are being generated on a county by …


Transfer Of Essential Fatty Acids By Marine Plankton, Adriana J. Veloza Jan 2005

Transfer Of Essential Fatty Acids By Marine Plankton, Adriana J. Veloza

Dissertations, Theses, and Masters Projects

Long chain n-3 polyunsaturated fatty acids (LCn-3 PUFAs) such as EPA and DHA are important biomolecules regulating production in marine ecosystems. This study examined how the interaction at the phytoplankton-zooplankton interface affected the transfer of LCn-3 PUFAs to higher trophic levels. Heterotrophic dinoflagellates contained higher levels of EPA and DHA than their algal prey, suggesting heterotrophic dinoflagellates enhanced the nutritional value of poor quality algae and subsequent transfer to the next trophic level. Formation of EPA and DHA in the dinoflagellates appears to be achieved by the elongation and desaturation of shorter fatty acid chains rather than through de novo …


Little Creek Naval Amphibious Base Chesapeake Bay Shoreline, C. Scott Hardaway Jr., Donna A. Milligan, George R. Thomas, Linda M. Meneghini Jan 2005

Little Creek Naval Amphibious Base Chesapeake Bay Shoreline, C. Scott Hardaway Jr., Donna A. Milligan, George R. Thomas, Linda M. Meneghini

Reports

Little Creek Naval Amphibious Base (NAB) is located in Virginia Beach, Virginia. It’s shoreline along the southern Chesapeake Bay extends from Little Creek Inlet eastward approximately 1.5 miles to the NAB’s eastern boundary. In 1997, a study and report entitled “LITTLE CREEK NAVAL AMPHIBIOUS BASE, CHESAPEAKE BAY SHORELINE, SHORELINE MANAGEMENT PLAN and OFFICER’S BEACH SHORE PROTECTION EVALUATION” was produced by VIMS’s Shoreline Studies Program (Hardaway et al., 1997). The purpose of that report was to assess the rates and patterns of beach change along the Chesapeake Bay shoreline at Little Creek NAB in order to develop a shoreline management plan, …


Shoreline Evolution Chesapeake Bay Shoreline City Of Norfolk, Va, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas, Travis R. Comer Jan 2005

Shoreline Evolution Chesapeake Bay Shoreline City Of Norfolk, Va, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas, Travis R. Comer

Reports

Shoreline evolution is the change in shore position through time. In fact, it is the material resistance of the coastal geologic underpinnings against the impinging hydrodynamic (and aerodynamic) forces. Along the shores of Chesapeake Bay, it is a process-response system. The processes at work include winds, waves, tides and currents, which together shape and modify coastlines by eroding, transporting and depositing sediments. The shore line is commonly plotted and measured to provide a rate of change, but it is as important to understand the geomorphic patterns of change. Shore analysis provides the basis to know how a particular coast has …


Shoreline Evolution, Chesapeake Bay Shoreline, City Of Virginia Beach, Virginia, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas, Travis R. Comer Jan 2005

Shoreline Evolution, Chesapeake Bay Shoreline, City Of Virginia Beach, Virginia, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas, Travis R. Comer

Reports

Shoreline evolution is the change in shore position through time. In fact, it is the material resistance of the coastal geologic underpinnings against the impinging hydrodynamic (and aerodynamic) forces. Along the shores of Chesapeake Bay, it is a process-response system. The processes at work include winds, waves, tides and currents, which shape and modify coastlines by eroding, transporting and depositing sediments. The shore line is commonly plotted and measured to provide a rate of change but it is as important to understand the geomorphic patterns of change. Shore analysis provides the basis to know how a particular coast has changed …


Shoreline Evolution, City Of Hampton, Virginia, Hampton Roads, Chesapeake Bay, And Back River Shorelines, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas Jan 2005

Shoreline Evolution, City Of Hampton, Virginia, Hampton Roads, Chesapeake Bay, And Back River Shorelines, C. Scott Hardaway Jr., Donna A. Milligan, Lyle M. Varnell, Christine A. Wilcox, George R. Thomas

Reports

Shoreline evolution is the change in shore position through time. In fact, it is the material resistance of the coastal geologic underpinnings against the impinging hydrodynamic (and aerodynamic) forces. Along the shores of Chesapeake Bay, it is a process-response system. The processes at work include winds, waves, tides and currents, which shape and modify coastlines by eroding, transporting and depositing sediments. The shore line is commonly plotted and measured to provide a rate of change but it is as important to understand the geomorphic patterns of change. Shore analysis provides the basis to know how a particular coast has changed …


Development Of The Maryland Shoreline Inventory Methods And Guidelines For Anne Arundel County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss Jan 2005

Development Of The Maryland Shoreline Inventory Methods And Guidelines For Anne Arundel County - Gis Data, Marcia Berman, Harry Berquist, Sharon Killeen, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss

Data

The Center for Coastal Resources Management (CCRM) at the Virginia Institute of Marine Science (VIMS) has generated Shoreline Situation Reports (SSRs) for coastal localities in the state of Maryland. This effort compliments a parallel effort in Virginia by the same group. SSRs were developed by VIMS in the 1970s for Virginia and have been the foundation for shoreline management planning in Tidewater Virginia ever since. CCRM has developed new protocols for collecting, disseminating, and reporting data relevant to shoreline management issues using state of the art mapping and remote sensing techniques. New SSRs are being generated on a county by …