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教学目标1.描述生态系统的概念;举例说出生态系统的类型。2.举例说出生态系统的营养结构;举例说出生态系统的组成成分及其作用;阐述生态系统各成分之间的相互关系,尝试建构生态系统的结构模型。3.举例说出生态系统的食物链、食物网,分析食物链、食物网中的各生物所处的营养级;分析食物网中种群数量变化的连锁反应。教学重点1.分析生态系统的组成成分。2.说出生态系统的各组分之间的关系:食物链、食物网和营
Teaching Objectives 1. Describe the concept of an ecosystem; give an example of the type of ecosystem. 2. Illustrate the nutritional structure of ecosystems; give examples of components of ecosystems and their roles; elaborate on the interrelationships between components of ecosystems; and try to construct a structural model of ecosystems. 3. Give an example of the ecosystem food chain, food web, analysis of the food chain, food web where the various organisms in the trophic level; analysis of food web population changes in the chain reaction. Teaching Points 1. Analyze the composition of the ecosystem. 2. Identify the relationships among the components of the ecosystem: the food chain, food webs and camps