But in the tropics the forest floor gradually depleted.

A fleet comprising 32 aircraft in 1984 gradually depleted to a three-strong at that time.

Air serves as the fuel for Extreme Gear, and is depleted gradually as the race goes on.

Each character has a life gauge that is gradually depleted as he gets struck by dodge balls.

Through most of the summer, then, the plankton in open ocean is gradually depleted.

Syria's oil reserves are being gradually depleted and reached 2.5 billion barrels in January 2009.

However, by 1894 gold extraction begun to decline in these islands and deposits became gradually depleted.

The Mexicans here say the population of the village is being gradually depleted, though high birth rates have compensated somewhat for the loss.

The asset was gradually depleted as small portions of the land were sold, over time, to resolve continued legal troubles of a close relative.

Those areas were developed first using primitive manual extraction methods and were gradually depleted, resulting in the present average concentration of about 2.6 percent.