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Showing 1 to 20 of 44 for “"Mountain-Lake"”.
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A productivity study on Smith Mountain Lake
… the upper end of the Roanoke River arm of Smith Mountain Lake has caused much concern. Eutrophic conditions have been established in this portion of the lake since 1965, when it was first brought to operating level. A multiphase productivity study was conducted on Smith Mountain Lake and lower …
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Hydrogeologic Controls on Lake Level at Mountain Lake, Virginia
Mountain Lake in Giles County, Virginia, has a documented history of severe natural lake-level changes involving groundwater seepage [Jansons, 2004] that extend over the past 4200 years [Cawley, 1999], and as of December 2010 the lake was about 2% full by volume. Situated in the Valley and Ridge …
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Mountain Lake Revisited: Impacts of Invasion on Native Symbiotic Systems
… of native symbiont communities. In the Mountain Lake region of Virginia, crayfish host diverse assemblages of obligate cleaning symbionts known as branchiobdellida. This cleaning symbiosis has been found to result in significant fitness benefits for native crayfish. Historical survey …
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The biological effects of artificial reefs in Smith Mountain Lake, Virginia
Artificial reefs were installed in Smith Mountain Lake, Virginia, during the summer and fall of 1973 to evaluate the biological effects on the aquatic ecosystem. Virtually all sport fishes were attracted to the reef areas. The frequency of sport fish on the reefs generally coincided with their …
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Examining Pathways for Water Loss from Mountain Lake, Giles County, Virginia
Located in Giles County, Virginia, Mountain Lake has a documented history of dramatic water level fluctuations. Previous water balance studies have documented that the main cause of water loss is outflow to groundwater. However, the flow paths of water exiting the lake are unknown. This study …
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Ammonia uptake by phytoplankton and limnological studies of Mountain Lake, Virginia
… first comprehensive year-round investigation of Mountain Lake, Virginia since 1970-71 was begun in March 1985 and continued through November 1987. Monthly studies suggested that this unique natural lake is undergoing change. Whereas inorganic nitrogen, orthophosphate, Secchi disc transparency, …
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Limnological investigations in Lake San Pablo, a high mountain lake in Ecuador
Äquatoriale Hochgebirgsseen sind eine besondere Art von Seen, die zwischen 2.500 und 4.000 m über dem Meeresspiegel liegen und hauptsächlich in den Anden von Ecuador, Peru und Kolumbien vorkommen. Im allgemein sind sie Kaltwasserseen mit Wassertemperaturen unter 20 °C. Ihre limnologischen Merkmale …
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Investigation of some characteristics of the Nitella population in Mountain Lake, Giles County, Virginia
The Nitella which grows in Mountain Lake, Giles County, Virginia, was investigated and found to be Nitella megacarpa (T.F.A.) em. R.D.W. after N. furcata subsp. megacarpa and not N. flexilis (L.) Ag. as previously reported. Internodal cell length was found to increase with depth, pigment content …
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Analysis of the Trophic Support Capacity of Smith Mountain Lake, Virginia, for Piscivorous Fish
… to meet current demand of piscivores in Smith Mountain Lake, Virginia. Surplus production, or the maximum sustainable supply, of alewife (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) were determined using data on the biomass, growth, and mortality of each species. Mean …
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A Re-Evaluation of Mountain Lake, Giles County, Virginia: Lake Origins, History and Environmental Systems
… 1. To review and assess the geomorphology and lake morphometry of Mountain Lake, Giles County, Virginia with regard to its age and origin. This included production of an updated bathymetric map of Mountain Lake using Sonar imaging of the lake bottom. 2. To evaluate present trophic conditions in …
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Studies of Mountain Lake, Virginia with particular reference to physical limnology and profundal bottom fauna
The present paper summarizes observations made on Mountain Lake, Virginia during 1961, 1962, and 1963. It includes data on the annual cycle of physical and chemical events occurring in the lake, and will serve as a point of departure for future, more specialized studies there. Observations made on …
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Food habits, population dynamics, and bioenergetics of four predatory fish species in Smith Mountain Lake, Virginia
… assess predator-prey interactions in Smith Mountain Lake, a large hydroelectric reservoir in south-central Virginia. A total of 1871 stomachs of the four species was examined from fish collections between April 1983 and December 1984. Food habits of each predatory species were assessed and …
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Limnological investigations of a natural, subalpine lake in the early stages of eutrophication: Mountain Lake, Giles County, Virginia
… year-round limnological investigations of Mountain Lake, Virginia were conducted from November 1992 through October 1994. Monthly physical, chemical, and biological measurements suggest that this ecosystem has shifted toward a more eutrophic condition. A trend in whole lake mean annual …
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Sources and yields of nutrient and organic loadings in the Roanoke River Basin above Smith Mountain Lake, Virginia
… in contributing to the fertilization of Smith Mountain Lake. The domestic wastewater effluents were found to be the prime contributors of organic carbon, nitrogen, and phosphorus in the upper basin. Urban land drainage was found to be the major runoff source of· phosphorus, while rural land …
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Regenerative Design Theory and Practice: A Demonstration of the Integrated Framework in a Resort Development at Mountain Lake, VA
… of a regenerative resort community at Mountain Lake, in Giles County, Virginia, is undertaken as a vehicle to demonstrate the process of development and evaluation under the integrated regenerative framework. Regenerative design is a form of sustainable design which incorporates the …
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Evaluation of two reef materials and point or cove locations for construction of artificial reefs in Smith Mountain Lake, Virginia
… to evaluate the use of artificial reefs in Smith Mountain Lake, Virginia. Twelve areas of the reservoir were selected for study. The sites were chosen from SCUBA and fathometer survey data on the basis of uniformity of water depth, substrate type, amount of submerged cover, and bottom topography. …
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Compatibility and complementarity of alewife (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) as forage fish in Smith Mountain Lake, Virginia
… (Micropterus salmoides) were evaluated in Smith Mountain Lake, an 8,337 ha hydroelectric impoundment in south-central Virginia. Alewife and gizzard shad larvae exhibited strong spatial segregation which minimized the potential for direct trophic competition and increased feeding opportunities for …
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