Loss of habitat due to human activities is a major threat to biological diversit y, and habitat destruction may be the major reason of species extinctions. Two p oints of interest and important questions are who will be the first to become e xtinct in matepopulation communities when the habitat is destroyed, the inferior competitors or the superior competitors? what effects will be exerted on the di fferent species by increasing the habitat? They are especially important today w hen environmental protecti...