1 “... communities, their structural and floristic characteristics, their origins, and their vulnerability to current...”

2 “... that make them vulnerable to manipulation by human actions. Even so, this first chapter will seem inadequate...”

3 “... and forest regions. This may to some extent relieve the heavy pressure on the vulnerable areas where short...”

4 “... fertilizers derived from petroleUIll, which, in turn, is vulnerable to political and economic fluctuations...”