Variations in phytoplankton composition were observed over 2.7 years in two warm temperate reservoirs in north central Texas, Joe Pool Lake (JPL) and Eagle Mountain Lake (EML), and analysed in relation to temperature, light, dissolved nutrients, seston nutrient ratios and hydrological variables. The dominant variations in both phytoplankton composition and environmental variables were seasonal ...

Fire has been a pervasive influence on the Sierra Nevadan landscape for millennia. Lake sediments containing charcoal and pollen indicate that fires have occurred for at least the past 13,000 years. Brunelle and Anderson (2003) found that charcoal accumulation varied with vegetation and temperature, increasing during warm periods dominated by oaks (Quercus spp.) and sagebrush (Artemisia trident...

Dissolved oxygen at approximately four times normal saturation (42 mg liter) inhibited the growth and metabolism of summer planktonic bacteria in the surface water of alpine oligotrophic Mountain Lake (Giles County, Va.). Data were derived from growth of CFU on membrane filters, d-[U-C]glucose incorporation into the extractable lipid of these CFU, and respiration and assimilation of d-[U-C]gluc...

Variational Methods have been frequently used for surface reconstruction and contour extraction (snakes). We present a surface reconstruction method where we assume the surface composed of two regions of di erent types of smoothness. One region of the surface models a \lake" (constant height region with uphill borders). It is surrounded by the other background region which is reconstructed usin...

During the Last Glaciation in Tasmania a large ice cap developed on the western edge of the Central Plateau and overlapped on to the Cradle Mountain-Lake St Clair area. Several reticulate lobes flowed from this source, with the largest northern outlet, the Mersey Glacier, covering an area of c. 282 km2• The Lake Ayr Valley was occupied by a smail diffiuent lobe of the Mersey Glacier, and the la...