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

本研究的目的是开发适用于初中和高中全球生态系统教学的实验练习和可视化教材，即视频节目和彩色幻灯片。开发的练习是“利用广盐藻Rhizoclonium riparium测量藻类光合作用”和“从各种藻类中提取和分离光合色素”。制作的录像节目有：（1）海苔的生活史和养殖;（2）螺旋藻，一种奇特的微生物;（3）石灰藻和颗石藻，预计它们对减少CO_2的贡献;（四）收集和观察用于评价河流水质的硅藻的程序。这些实验室练习和直观教材似乎有所帮助使学生了解藻类在水生态系统中的作用及其在解决水污染和CO_2温室效应等当前严重的环境问题中的重要性。

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.