资讯

Oaks are keystone trees because they hold a forest ecosystem together by providing resources and habitats for diverse forms ...
“I saw in Louisiana a live-oak growing / All ... sporting a zigzagging white line that resembles an “M” and, to some observers, a false eye. In the American South, caterpillars lay their ...
Forest management is the need of the hour for environment conservationists. Specific crops must get conditions and care ...
The National Park Service, which manages the White House grounds, said the sapling was grown at its offsite greenhouse ...