gradient of communites and environments

例句：

1. 1. The gradient ofthe slope is steeper thanthat of the other side.
   这个斜坡的斜率比其他那边的陡峭。
2. 2. Thegradient of the soil is important for plantgrowth.
   土壤的梯度对植物生长很重要。
3. 3.The gradient of the temperature changes with altitude.
   温度的梯度随着海拔的变化而变化。