(1)5-3(個人翻譯)80-2-3~82-1-2

原文:

On maps such as the one in Figure 5-8,biomes are shown with sharp boundaries,each being civered with one general type of vegetation.In reality,biomes are not uniform.They consist of a mosaic of patches,each with somewhat different biological communities but with similarities typical of biome.These patches occur mostly beacaus the resources that plants and animals need are not uniformly distributed and because human activities remove and alter the natural vegetation in many areas.

Figure 5-9 shows how climate and vegetation vary with latitude and elevation.Ifyou climb a tallmountain form its base to its summit,you can observe changes in plant life similar to those you would encounter in traveling form the equator to one of the earth’s poles.For example,if you hike up a tall mountain in Ecuador,your trek can beging in a tropical rain forest and end on a glacier at the summit.

Differences in climate,mostly form average annual precipitation and temperature,lead to the formation of tropical hot,temperate moderate,and polar cold deserts,grasslands,and forests(Figure 5-10)

翻譯:

在地圖5-8上，生態社會被明顯的分界，每一個都涵蓋了一般的植披類型。實際上，生態社會是不相同的。它們包含了馬賽克斑點，它們在生態族群中有些許的不同當也有相似之處。那些斑點大部分出現的原因是資源，包含動植物的需求不一致以及人類活動改變或去除了許多地區的自然植披。

圖5-9顯示氣候與植披的改變與緯度和高度有關。假如你從山腳開始爬爬到山頂，你可以注意到植披的改變類似於你從赤道到極地的植披改變。例如:如果你在厄瓜多爾爬一座高山。你慢慢地前進，開始時是熱帶雨林氣候而當你爬到山頂時卻是冰河。

氣候的不同主要是每年的平均雨量和平均溫度不同，導致了熱帶，溫帶，極地，沙漠，草原，雨林等的出現。