Physical Sciences and Mathematics Commons^™

Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 1999-2003 Annual Report, 1 September 2000 - 31 October 2001, Philip W. Sadler, Robert J. Latour, Robert E. Harris, John E. Olney

Reports

This report presents the results of striped bass (Marone saxatilis) tagging and monitoring activities in Virginia during the penod 1 September 2000 through 31 October 2001. It includes an assessment of the biological characteristics of striped bass taken from the 2001 spring spawning run, estimates of annual survtval based on annual spring tagging, and the results of the fall 2000 directed mortality study that is cooperative with the Maryland Department of Natural Resources. The information contained in this report is required by the Atlantic States Marine Fisheries Commission and is used to implement a coordinated management plan for striped bass …

Tracking The Fate Of A High Concentration Groundwater Nitrate Plume Through A Fringing Marsh: A Combined Groundwater Tracer And In Situ Isotope Enrichment Study, Cr Tobias, Sa Macko, Iris C. Anderson, Elizabeth A. Canuel, Jw Harvey

VIMS Articles

A groundwater plume enriched in (15)NO(3)(-) was created upgradient of a mesohaline salt marsh. By measuring the changes in concentration and isotopic enrichment of NO(3)(-), N(2)O, N(2), NH(4)(+), and particulate organic nitrogen (PON) during plume transport through the marsh, in situ rates of dissimilatory nitrate reduction to ammonium (DNRA) and denitrification (DNF) were estimated, as well as N storage in the reduced N pools. For groundwater discharge within the top 10 cm of marsh, NO(3)(-) removal was 90% complete within the 50 cm of marsh nearest the upland border. The peak NO(3)(-) loss rate from the plume ranged from 208 …

Three Dimensional Hydrodynamic Modeling Study, Craney Island Eastward Expansion, Lower James River And Elizabeth River, Virginia, Harry V. Wang, S. C. Kim, John D. Boon, A. Y. Kuo, G. M. Sisson, J. M. Brubaker, J. P-Y. Maa

Reports

The Craney Island Eastward Expansion Hydrodynamic Model Study was conducted in three phases: 1) model calibration and verification for the Elizabeth River, 2) model testing of four Craney Island expansion options using single variable runs (using a single variable, tidal range, for model input), 3) model testing of two expansion options using historical runs (using multiple variables in real time for model input). The expansion option designs were evaluated for both global and local hydrodynamic change through simulation comparisons with the Base Case condition.

Ecological Characterization Of Stormwater Detention Ponds In Virginia's Coastal Plain, Rebecca Jo Thomas, Carl H. Hershner

Reports

No abstract provided.

Monitoring Of Suspended Sediment Plume Formed During Oyster Shell Dredging In The James River, Virginia, August 2001, Carl T. Friedrichs, Grace M. Massey

Reports

No abstract provided.

Chesapeake Bay Dune Systems: Evolution And Status, C. Scott Hardaway Jr., Lyle M. Varnell, Donna A. Milligan, George R. Thomas, Carl H. Hobbs Iii

Reports

The goals of this study were to locate, classify, and enumerate the existing jurisdictional dunes and dune fields within the eight localities listed in the Act. These include the counties of Accomack, Lancaster, Mathews, Northampton, and Northumberland and the cities of Hampton, Norfolk, and Virginia Beach. Only Chesapeake Bay and river sites are considered in this study.

The Crest, Fall 2001, Virginia Institute Of Marine Science

Reports

Table of Contents:

• VIMS Named World Reference Laboratory for Shellfish Diseases
• VIMS Scientists Receive 2001 Best Paper Award
• Domestic Interest Grows in Cobia Culture VIMS Foundation Established
• VIMS Environmental Scientists Spearheading BDE Research in USA
• VIMS Capital Campaign for Kauffman Aquaculture Center Meets its Goal
• Dr. William Reay Named New Manager of Chesapeake Bay National Estuarine Research Reserve
• Summer Course Connects Scientists with Science Teachers
• Beset near 68 degrees south, 69 degrees west
• New researcher studies tiny organisms that play a big role
• VIMS Welcomes New Students
• VIMS to initiate coastal observing program
• VIMS student Receives Dr. Nancy Foster Scholarship …

Riparian Restoration, Elizabeth M. Norris, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.

Mode Locking In A Periodically Forced Integrate-And-Fire-Or-Burst Neuron Model, S. Coombes, R. Owen, Gregory D. Smith

Arts & Sciences Articles

The minimal “integrate-and-fire-or-burst” (IFB) neuron model reproduces the salient features of experimentally observed thalamocortical relay neuron response properties, including the temporal tuning of both tonic spiking (i.e., conventional action potentials) and post-inhibitory rebound bursting mediated by the low-threshold Ca2+ current, IT. In previous work focusing on experimental and IFB model responses to sinusoidal current injection, large regions of stimulus parameter space were observed for which the response was entrained to periodic applied current, resulting in repetitive burst, tonic, or mixed (i.e., burst followed by tonic) responses. Here we present an exact analysis of such mode-locking in the integrate-and-fire-or-burst model under …

Evaluation Of Comparative Watercraft Personal Property Taxation In Middle Peninsula Localities, Thomas J. Murray

Reports

The Marine Business and Coastal Development Program, Sea Grant Marine Advisory Services at the Virginia Institute of Marine Science, (VIMS) has completed a characterization of the personal property taxing methodologies currently used by Middle Peninsula localities. In conjunction with the Middle Peninsula Planning District Commission's (MPPDC) Coastal Technical Assistance Program, the investigation details the following information:

1. Documentation of the watercraft taxing methodology currently used in the MPPDC counties of Gloucester, Mathews, Middlesex, King and Queen, King William, and Essex County.

2. A comparison of resulting taxes assessed by each of the MPPDC localities on some "standardized" boats.

3. A …

Virginia Boating Plan And Access Needs Assessment, Thomas J. Murray

Reports

In an effort to support Virginia's application for federal grant funds under the Department of Interior's "Boating Infrastructure Grant Program" (Grants), the Marina Technical Advisory Program (MT AP) at the Virginia Institute of Marine Science has undertaken assessment of the state's recreational boating infrastructure needs. 1 A total of $32 million has been authorized over four years to fund this new program. It is designed to help states develop and maintain facilities for transient non-trailerable (26' and over) recreational boats. The Virginia Department of Health (VDOH) has provided overall leadership in the Boating Infrastructure Grants process and has been supported …

Estimating Relative Abundance Of Young Of The Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay, Patrick J. Greer

Reports

The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan for American Eel (FMP) in November 1999. The Plan focuses on increasing the states’ efforts to collect data on the resource and the fishery it supports through fishery dependent and independent studies. To this end, member jurisdictions (including Virginia) agreed to implement an annual abundance survey of young-of-year American eel (YOY). The survey is intended to “...characterize trends in annual recruitment of the young of the year eel over time [to produce a] qualitative appraisal of the annual recruitment of American eel to the U.S. Atlantic coast …

Sources And Cycling Of Dissolved And Particulate Organic Radiocarbon In The Northwest Atlantic Continental Margin, Je Bauer, Erm Druffel, Dm Wolgast, S Griffin

VIMS Articles

Continental shelves and slopes are productive and dynamic ocean margin systems that also regulate the fluxes of terrestrial, riverine, and estuarine materials between the continents and oceans. In order to evaluate the ages, potential sources, and transformations of organic matter in an ocean margin system, we measured the radiocarbon (Delta (14)C and delta (13)C distributions of total dissolved organic carbon (DOC), suspended particulate organic carbon (POC), and dissolved inorganic carbon (DIC) in waters of the Middle Atlantic Bight (MAB) continental shelf and slope in April-May 1994. The Delta (14)C of DOC was greatest (as high as -39 parts per thousand) …

Riparian Forest Buffer Restoration Targeting For The York River Watershed, Anne Newsome, Carl Hershner, Dan Schatt, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.

Application Of A Watershed Model (Basinsim) And A Tidal Prism Water Quality Model (Tpwqm) To The Great Wicomico River, Virginia, Sung-Chan Kim, Richard Wetzel, Leonard Hass, Albert Kuo

Reports

The objective of this project is to develop a modeling package to assist in water quality management of small coastal basins (SCBs) of the Chesapeake Bay system. Efforts by the Commonwealth to address water quality and its effect on living resources in tidal, estuarine systems has focused primarily on the Chesapeake Bay and the major tributaries of the lower bay (James, York and Rappahannock Rivers), as evidenced by the extensive monitoring and modeling efforts directed to them. This has been at the expense of smaller coastal basins such as the Great Wicomico River and the numerous tidal creek systems of …

Mitochondrial Gene Rearrangements Confirm The Parallel Evolution Of The Crab-Like Form, C. L. Morrison, A. W. Harvey, S. Lavery, K. Tieu, Y. Huang, C. W. Cunningham

VIMS Articles

The repeated appearance of strikingly similar crab-like forms in independent decapod crustacean lineages represents a remarkable case of parallel evolution. Uncertainty surrounding the phylogenetic relationships among crab-like lineages has hampered evolutionary studies. As is often the case, aligned DNA sequences by themselves were unable to fully resolve these relationships. Four nested mitochondrial gene rearrangements—including one of the few reported movements of an arthropod protein-coding gene—are congruent with the DNA phylogeny and help to resolve a crucial node. A phylogenetic analysis of DNA sequences, and gene rearrangements, supported five independent origins of the crab-like form, and suggests that the evolution of …

The Crest, Summer 2001, Virginia Institute Of Marine Science

Reports

Table of Contents:

• VIMS to Begin New Ecosystem Management Study
• CBNERRVA Receives Coastal America Partnership Award
• VIMS Shoreline Permit Application Reports Now Available Online
• Marina Program Launched
• Web Based Education Hub Developed by VIMS/Sea Grant Educators
• In the middle of the storm... where VIMS scientists plan to be
• Continental margins--where the action is
• Aquaculture and agriculture--working together for solutions
• Marine Finfish Culture Activities
• Kauffman Aquaculture Center Campaign
• New Graduate Courses for Science Teachers
• VIMS scientists explore pollution of Antarctic sea ice
• Mid-Atlantic Scallop Closed Areas Set to Reopen
• VIMS study poses new questions on river carbon
• Marine Industry Trends
• Stranded …

Vims Shoreline Permit Database Impacts And Alterations Impacts And Alterations Summary 1993- 2000, Thomas A. Barnard, Patty Clancy, Karen Duhring, Kirk J. Havens, Carl Hershner, Pamela Mason, David O'Brien, Walter L. Priest, William L. Roberts, Lyle M. Varnell, David Weiss, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.

Essex County And The Town Of Tappahannock Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Dan Schatt, Kevin Skunda

Reports

The data inventory developed for the Shoreline Situation Reports are based on a three-tiered shoreline assessment approach. This assessment characterizes conditions in the shorezone observed from a small boat moving along the shoreline. Handheld GPS units record data observations in the field. The three tiered shoreline assessment approach divides the shorezone into three regions:

1. the immediate riparian zone, evaluated for land use

2. the bank, evaluated for height, stability, cover and natural protection

3. the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

Three GIS coverages are generated from the collection technique. The essex_lubc coverage are features …

Dynamic Bacterial And Viral Response To An Algal Bloom At Subzero Temperatures, Patricia L. Yager, Tara L. Connelly, Behzad Mortazavi, K. Eric Wommack, Nasreen Bano, James E. Bauer, Stephen Opsahl, James T. Hollibaugh

VIMS Articles

New evidence suggests that cold‐loving (psychrophilic) bacteria may be a dynamic component of the episodic bloom events of high‐latitude ecosystems. Here we report the results of an unusually early springtime study of pelagic microbial activity in the coastal Alaskan Arctic. Heterotrophic bacterioplankton clearly responded to an algal bloom by doubling cell size, increasing the fraction of actively respiring cells (up to an unprecedented 84% metabolically active using redox dye CTC), shifting substrate‐uptake capabilities from kinetic parameters better adapted to lower substrate concentrations to those more suited for higher concentrations, and more than doubling cell abundance. Community composition (determined by polymerase …

Status Of The Major Oyster Diseases In Virginia 2000 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson

Reports

As a consequence of the relatively warm temperatures, high salinities, and high oyster parasite abundances in the fall of 1999, both P. marinus and H. nelsoni were widely distributed throughout oyster populations in Virginia in 2000. Fortunately, however, we did not see severe epizootics of the diseases as observed in some areas in 1999.

Quantifying Groundwater Discharge Through Fringing Wetlands To Estuaries: Seasonal Variability, Methods Comparison, And Implications For Wetland-Estuary Exchange, Cr Tobias, Jw Harvey, Iris C. Anderson

VIMS Articles

Because groundwater discharge along coastal shorelines is often concentrated in zones inhabited by fringing wetlands, accurately estimating discharge is essential for understanding its effect on the function and maintenance of these ecosystems. Most previous estimates of groundwater discharge to coastal wetlands have been temporally limited and have used only a single approach to estimate discharge. Furthermore, groundwater input has not been considered as a major mechanism controlling pore-water flushing. We estimated seasonally varying groundwater discharge into a fringing estuarine wetland using three independent methods (Darcy's Law, salt balance, and Br- tracer). Seasonal patterns of discharge predicted by both Darcy's Law …

Monitoring Relative Abundance Of American Shad In Virginia’S Rivers 2000 Annual Report, John E. Olney, John M. Hoenig

Reports

Since the moratorium, there have been no monitoring programs that provided direct assessment of stock recovery until this project began in 1998. The ban on in-river fishing in Virginia remained in effect, creating a dilemma for managers who needed reliable information in order to make a rational decision on when the in-river ban could safely be lifted. To address this deficiency, we proposed a method of scientific monitoring to estimate catch rates relative to those recorded before the prohibition of in-river fishing in 1994. This monitoring program began in 1998 and consisted of sampling techniques and locations that were consistent …

Hydrography, Nutrients, And Carbon Pools In The Pacific Sector Of The Southern Ocean: Implications For Carbon Flux, Kendra L. Daly, Walker O. Smith Jr., Gregory C. Johnson, Et Al

VIMS Articles

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Abstract

We investigated the hydrography, nutrients, and dissolved and particulate carbon pools in the western Pacific sector of the Antarctic Circumpolar Current (ACC) during austral summer 1996 to assess the region's role in the carbon cycle. Low f CO₂ values along two transects indicated that much of the study area was a sink for atmospheric CO₂. The f CO₂ values were lowest near the Polar Front (PF) and the Subtropical Front (STF), concomitant with maxima of chlorophyll a and particulate and dissolved organic carbon. The largest biomass accumulations did not occur at fronts, …

The Teaching Marsh : A Tidal Wetland Restoration & Education Project, William Roberts, Karen Duhring

Miscellaneous

The Teaching Marsh at the Virginia Institute of Marine Science is a one acre site restored to marshland for both practical and educational purposes. The marsh is designed and maintained by VIMS wetlands experts to naturally remove contaminants from Coleman Bridge storm water runoff, improving water quality in the York River.

The brochure describes the development, site, and plants selected for the field project.

The Paraguay-Paraná Hidrovía: Protecting The Pantanal With Lessons From The Past: Large-Scale Channelization Of The Northern Paraguay-Paraná Seems To Be On Hold, But An Ongoing Multitude Of Smaller-Scale Activities May Turn The Pantanal Into The Next Example Of The “Tyranny Of Small Decisions”, Johan F. Gottgens, James E. Perry, Et Al

VIMS Articles

Because it is one of the most inaccessible places on earth, this large, rich ecosystem has remained relatively untouched. There is, however, increasing evidence that this area is threatened by a number of activities, including mining, illegal hunting and fishing, indiscriminate use of fire, agricultural development, and deforestation. Careless use of mercury in gold mining, particularly in the northern Pantanal, may have resulted in acute and chronic ecosystem disruption (Hylander et al. 1994, Nogueira et al. 1997, Leady and Gottgens 2001). Wildlife poaching and live animal trade are widespread although hard to quantify. During six months in 1985, the skins …

Organization And Bifurcation Of Planar Closed Orbits Of An Atomic Electron In Crossed Fields, D. M. Wang, John B. Delos

Arts & Sciences Articles

We describe the patterns of creation and splitting of planar closed orbits of electrons in hydrogen atoms in crossed electric and magnetic fields. These orbits lie in the plane perpendicular to the magnetic field, and they start and end at the nucleus. Using a Poincaré map to study the regular motions, we observe that the bifurcations of planar closed orbits fall into an ordered sequence as energy changes: a “tangent bifurcation” creates one closed orbit that splits into two; subsequently, one of them becomes periodic, and splits by a “pitchfork bifurcation” into two periodic orbits and one closed orbit. Based …

City Of Poquoson Shoreline Situation Report, Marcia Berman, Harry Berquist, Sharon Dewing, J. B. Glover, Carl Hershner, Tamia Rudnicky, Daniel E. Schatt, Kevin Skunda

Reports

No abstract provided.

2001 Gloucester Point Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.

2001 Wachapreague Station Tide Prediction Calendars, Virginia Institute Of Marine Science, David A. Evans

Miscellaneous

These calendars are produced monthly using David Evans' Tidecal.