A marsh and grassy wetland in southern Florida, United States. It extends west of Miami and Palm Beach, covering the area south of Lake Okeechobee. It covers an area of about 10,000 km2 . There are few trees, and many grasses such as silver grass. Swamps and floodplain sand dunes cover a large area. The terrain is almost flat, with a gradient of 3 cm per km. Most of the area is flooded for most of the year. Since 1915, parts of the southern part of Florida have been protected as flora and fauna areas, but in 1947 Everglades National Park was established, and plants such as mangroves and cypresses, and birds such as herons, egrets, and ibises became the subject of full-scale protection. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
アメリカ合衆国,フロリダ州南部の沼沢および草地の多い湿地帯。マイアミやパームビーチの西方に広がり,オキーチョビー湖の南側一帯にあたる。面積は約1万 km2。樹木は少く,ススキなどの草類が多い。沼地,氾濫原砂丘が広い面積を占める。ほとんど平坦な地形で,その勾配は 1kmあたり 3cm。その大部分は,1年の大半が冠水している。 1915年以来,フロリダ州は南部地方の一部分を動植物保護地区にしてきたが,47年エバーグレーズ国立公園が設定され,マングローブやイトスギなどの植物や,サギ,シラサギ,トキなどの鳥類が本格的な保護の対象となった。
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