研究显示,佛罗里达的庄园在殖民化之前是稀有的,随着水域变暖,这些庄园变得更加普遍。 Study shows Florida manatees were rare before colonization, becoming more common as waters warmed.
一项新研究显示,佛罗里达的庄园最初更像游客,而不是永久居民,在欧洲殖民化之后,很少从加勒比到访。 A new study suggests Florida manatees were originally more like tourists than permanent residents, rarely visiting from the Caribbean until after European colonization. 这项发表在 PLOS ONE 上的研究表明，随着小冰河时代后海水变暖，佛罗里达州的海牛变得更加丰富。 The research, published in PLOS ONE, indicates that manatees became more abundant in Florida as waters warmed following the Little Ice Age. 尽管数量不断增加,但海牛面临发电厂造成的污染和温水生境丧失的威胁。 Despite their growing numbers, manatees face threats from pollution and the loss of warm-water habitats provided by power plants.