For 7 years since 2006, the ponds were drained each year using this method. This successfully prevented the outbreak of invasive alien species such as largemouth bass, bluegill, and the American bullfrog, and revitalized the ponds ecosystem for endemic fish and clam species.
政教 社 同人 に よ る 社会 へ の 関わ り 方 と し て 、 次 の 事例 を 挙げ る こと が でき る 。JParaCrawl3 JParaCrawl3