
Songlin Fei, a forest ecologist at Purdue University in West Lafayette, Indiana, and his colleagues tracked the shifting distributions of 86 types of trees using data collected by the US Forest Service's Forest Inventory and Analysis Program during two periods: from 1980 to 1995 and ...आगे पढ़ें asiakhabar.com | July 21, 2013 | 4:41 pm IST