課堂翻譯(3)

4-3 What is an Ecological niche?
什麼是生態學地位??

第二、三段

A particular niche is the result of long-term evolutionary changes in a species. Scientists use the niches of species to classify them broadly as generalists or specialists.Generalist species have broad niches.They can live in many different places ,eat a variety of foods, and often tolerate a wide range of environmental conditions. Flies,cockroaches ,mice,rats,white-tailed deer,raccoons,and humans are generalist species.

一個特指地位是指由於長期物種的演變。科學家利用物種地位將其分類，基本上是全材或是專科。多面物種有基本的地位，他們可以居住在不同地方，吃多種食物，以及容許寬範圍的環境狀況，像蟑螂、老鼠、白尾鹿、浣熊和人的通才物種。

Specialist species occupy narrow niches . They may be able to live in only one type of habitat , use one or a few types of food , or tolerate a narrow range of climatic and other environmental conditions . This makes specialists more prone to extinction when enviromental conditions changes.

專科物種使用狹小的地位。他們只能居住在一種型式的生活環境，食用一種或少種食物，或容許小範圍氣候及其他環境狀況。這些物種當環境狀況改變可能會遭受滅絕。