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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Dinoflagellate Cysts Within Sediment Collections From The Southern Chesapeake Bay, And Tidal Regions Of The James, York, And Rappahannock Rivers, Virginia, David W. Seaborn, Harold G. Marshall
Dinoflagellate Cysts Within Sediment Collections From The Southern Chesapeake Bay, And Tidal Regions Of The James, York, And Rappahannock Rivers, Virginia, David W. Seaborn, Harold G. Marshall
Virginia Journal of Science
The upper 2 cm of sediment core samples from 70 stations in the tidal waters of three Virginia rivers and at 23 stations in the lower Chesapeake Bay were sampled for dinoflagellate cysts. The river sediment cysts were dominated by three common bloom producing species (Heterocapsa triquetra, Scrippsiella trochoidea, and Cochlodinium polykrikoides), whereas these were in low concentration on the Chesapeake Bay sediments which contained mainly dinoflagellate cysts of neritic and oceanic taxa. The mean sediment concentrations from stations in the James, York, and Rappahannock rivers were respectively 1174.8, 536.2, and 323.6 cysts g-1. The mean …
Chesapeake Bay National Estuarine Research Reserve In Virginia Management Plan: 2008-2012, W. G. Reay, Sandra Erdle, Scott Lerberg, Sarah Mcguire, Ken Moore
Chesapeake Bay National Estuarine Research Reserve In Virginia Management Plan: 2008-2012, W. G. Reay, Sandra Erdle, Scott Lerberg, Sarah Mcguire, Ken Moore
Reports
No abstract provided.
Economic Implications Of Alternative Management Strategies For Virginia Oysters And Clams, Darrell Bosch, Nicolai V. Kuminoff, Anna Harris, Jaren C. Pope, Kurt Stephenson, Pamela Mason
Economic Implications Of Alternative Management Strategies For Virginia Oysters And Clams, Darrell Bosch, Nicolai V. Kuminoff, Anna Harris, Jaren C. Pope, Kurt Stephenson, Pamela Mason
Reports
The Virginia shellfish industry has historically been an important element of the state’s economy. After long-term downward trends in the harvest of wild stocks, clam and oyster production from shellfish aquaculture has been growing. This report provides an analysis of the possible ways to support and enhance this expansion through a variety of shellfish policy options. Three general classes of policy alternatives were considered: 1) state policy to increase private grounds available for shellfish production, 2) state research and development programs, and 3) various financial incentives to increase production. In general, the availability of suitable lease ground is not a …
Water Quality Conditions And Restoration Of Submerged Aquatic Vegetation (Sav) In The Tidal Freshwater James River 2007, Ken Moore, Betty Neikirk, Erin C. Shields, Jessie Jarvis, David Parrish
Water Quality Conditions And Restoration Of Submerged Aquatic Vegetation (Sav) In The Tidal Freshwater James River 2007, Ken Moore, Betty Neikirk, Erin C. Shields, Jessie Jarvis, David Parrish
Reports
In 2007, wild celery (Vallisneria americana) and water stargrass (Heteranthera dubia) were planted at sites in the Hopewell region of the tidal James River. The SA V transplants from 2007 and previous years were monitoried by the Virginia Institute of Marine Science (VIMS) for survivorship and growth throughout the growing season. Nursery ponds were constructed at the VIMS campus for development of SA V transplant propagules. Water quality sampling was conducted at bi-weekly intervals throughout the year for water column nutrients, chlorophyll a, suspended solids, water transparency and other chemical and physical constituents important for SAV growth. Continuous water quality …
Monitoring Relative Abundance Of American Shad In Virginia Rivers 2007 Annual Report, John E. Olney, Brian Watkins
Monitoring Relative Abundance Of American Shad In Virginia Rivers 2007 Annual Report, John E. Olney, Brian Watkins
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 …
Topographic Factors Affecting The Tree Species Composition Of Forests In The Upper Piedmont Of Virginia, Rachael C. Brown, Todd S. Fredericksen
Topographic Factors Affecting The Tree Species Composition Of Forests In The Upper Piedmont Of Virginia, Rachael C. Brown, Todd S. Fredericksen
Virginia Journal of Science
There are many factors that influence forest species composition and many are linked to topographical features. This study, conducted on the Ferrum College campus in the Upper Piedmont Physiographic Province of Virginia revealed three major forest types associated with topographic factors using cluster analysis and detrended correspondence analysis . The first type of forest occurred mostly on northeastern slopes on toe slope topographic positions and was mainly composed of tulip tree (Liriodendron tulipifera) and red maple (Acer rubrum). The second type of forest was found on shoulder and side slope positions and was composed mostly of …
Preliminary Assessment Of Nonpoint Source Fecal Coliform Loading And Flushing Capability In The Back Bay, Virginia, Mac Sisson, Harry V. Wang, Jian Shen, Tao Shen
Preliminary Assessment Of Nonpoint Source Fecal Coliform Loading And Flushing Capability In The Back Bay, Virginia, Mac Sisson, Harry V. Wang, Jian Shen, Tao Shen
Reports
No abstract provided.
Factors Affecting Autumn Deer–Vehicle Collisions In A Rural Virginia County, William J. Mcshea, Chad M. Stewart, Laura J. Kearns, Stefano Liccioli, David Kocka
Factors Affecting Autumn Deer–Vehicle Collisions In A Rural Virginia County, William J. Mcshea, Chad M. Stewart, Laura J. Kearns, Stefano Liccioli, David Kocka
Human–Wildlife Interactions
Vehicular collisions with white-tailed deer (Odocoileus virginianus) are a safety and economic hazard to motorists. Many efforts to reduce deer–vehicle collisions (DVCs) have proven unsuccessful, but deer reduction has been a primary management tool in several states. The Virginia Department of Transportation geo-located all known DVCs in Clarke County, Virginia, from August through December 2005 (n = 246) and 2006 (n = 259). We estimated harvest intensity, deer population density, amount of forest and housing development, presence of row crops, and traffic volume and speed for 228 road segments (each 500 m in length) within the …
Bycatch Reduction Panels Improve Catch Composition And Size Distribution Of Fishes Retained In Pound Nets, Christian Hager
Bycatch Reduction Panels Improve Catch Composition And Size Distribution Of Fishes Retained In Pound Nets, Christian Hager
Reports
No abstract provided.