A keystone in an arch's crown secures the other stones in place. Keystone species play the same role in many ecological communities by maintaining the structure and integrity of the community. The ...
Ecology and Society, Vol. 9, No. 3 (Dec 2004) (18 pages) ABSTRACT. Ecologists have long recognized that some species, by virtue of the key roles they play in the overall structure and functioning of ...
33,187 people played the daily Crossword recently. Can you solve it faster than others?33,187 people played the daily Crossword recently. Can you solve it faster than others?
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