Developments of teaching materials and laboratory exercises concerning algae for purpose of understanding gobal ecosystem.

本研究的目的是开发一些实验室练习和视觉教材，即视频节目和彩色幻灯片，有助于在初中和高中阶段教授全球生态系统。开发的练习是“使用广盐藻和滨水根藻测量藻类光合作用”和“从各种藻类中提取和分离光合色素”。制作的视频节目如下：(1)“紫菜”，它的生命周期和栽培；(2)螺旋藻，一种奇特的微生物；(3)钙藻和球石藻对CO_2降低的贡献较大；（四）用于河流水质评价的硅藻采集和观察程序。这些实验练习和可视化教材似乎可以帮助学生了解藻类在水生生态系统中的作用，以及它在解决一些当前严重的环境问题方面的重要性，如水污染和二氧化碳的温室效应。

The purpose of the present research was to develop some laboratory exercises and visual teaching materials namely video programs and color slides useful for teaching the global ecosystem at the junior high school and senior high school levels.The exercises developed are "Measurement of algal photosynthesis using euryhalinous alga, Rhizoclonium riparium" and "Extraction and separation of photosynthetic pigment from various algae" . Video programs produced are as follows : (1) "Nori" , its life cycle and cultivation ; (2) Spirulina, a strange microorganism ; (3) Calcareous algae and coccolithophorid algae being expected their contribution to the decrease in CO_2 ; (4) The procedure for collection and observation of diatoms used for evaluation of river water quality.These laboratory exercises and visual teaching materials seem to help students to understand the role of algae in aquatic ecosystems and its importance in solving some resent serious environmental problems such as water pollution and greenhouse effect of CO_2.