资讯

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 questions "What are species?" and "How do we identify species?" are difficult to answer, and have led to debate and disagreement among biologists. See how consensus on answers to these ...
Species numbers are clearly declining The findings of the study are unequivocal and leave no doubt as to the devastating impact that humans are having on biodiversity worldwide. "We analyzed the ...
Are humans the only species to drive another to extinction? Tom Ruppel | Dixon, California Human activities are the most prominent cause of species extinction today, but not the only one.