1. The Institute of Agriculture; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho Fuchu Tokyo 183-8509 Japan
2. Center for Environmental Biology and Ecosystem Studies; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
3. Sumashofu High School; 1-5-5 Nishiochiai Suma-ku Kobe 654-0155 Japan
4. Graduate School of Science; Kobe University; 1-1 Rokkodai Nada-ku Kobe 657-8501 Japan