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北美五分之一蝴蝶已经消失,其中22个物种降幅超90%
美国西南部地区蝴蝶数量下降态势最为显著,而太平洋西北地区下降幅度相对最小。 在这20年里,超过100个物种的数量降幅超过50%。其中,有22个物种数量降幅超过90%。 国际自然保护联盟物种生存委员会蝴蝶和飞蛾专家小组(International ...
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