図1 阿寒湖のマリモ (IMAGE) Kobe University Caption 右写真のマリモの直径は約20 cm Credit Photographs adapted with permission from Yoichi Oyama. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.