羽生市宝蔵寺沼ムジナモ自生地緊急調査
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概要
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This investigation of a natural habitat of Aldrovanda vesiculosa, an almost extinct aquatic carnivorous plant was initiated by request of Hanyu City. Hozoji pond in Hanyu is the last domestic habitat of Aldrovanda vesiculosa and designated as a natural monument of Japan. Although much effort has been expended by Hanyu city and the Mujinamo Preservation Society to foster growth of Aldrovanda vesiculosa in the pond since the last investigation in the 1970s, the number of plants that survive through the year remains very limited. In order to restore the environment for Aldrovanda vesiculosa growth, 16 researchers conducted experiments and field studies on the distribution of plants and insects, water and soil analysis, and other questions.