Zackenbergdalen was selected as the main study area because of its great diversity in physical landscape features, plant communities, and other biota.
In the thirty-five yearsincece he first arrived at Palmer Station, the population of Adélie penguins on the seven islands that compose his main study area — Torgersen, Humble, Litchfield, Cormorant, Christine, Dream, and Biscoe Point — has declined from between thirty thousand and forty thousand breeding pairs to fifty-six hundred breeding pairs, a drop of more than eighty per cent.
Closer to El Verde, a group of eight volunteers — recent college graduates with an interest in natural science (and in living in Puerto Rico for six months) — were doing similar work at the field station's main study area, 40 acres of forest divided into a grid of 400 plots, each about 65 feet by 65 feet.
Including provincial boundaries, major rivers, outline of the Sanjiangyuan region, and main study area (Zhiduo County).
The three western counties of the prefecture that comprise the main study area, namely, Qumalai (Chumarleb), Zhiduo (Dritoe) and Zaduo (Zatoe) - cover an area of approximately 110,000 km2, about the size of Bulgaria or three times the size of Bhutan (Figure 1).
Three images from each period were classified independently using the same approach as for the main study area.
The tracer tests were undertaken at eight UK Coal Authority mine water treatment systems (lagoons and wetlands) within Northern England (main study areas) and part of southern Scotland.
The project covered 38 census tracts in five main study areas: the northwest, the north central, the northeast, the "gold coast" and the southern peninsula.
The main study areas included heat and power generation, traffic, buildings and their effect on health and well-being.
The result was surprising, almost shocking: the correlation was not only poor, it was virtually absent for the main study areas: burns, trauma, endotoxemia.
The sample population for the EcoSalud project was drawn from four main study areas within the Cayambe-Tabacundo region, two northern sections and two southern sections with a total of 12 communities within the overall study area.
