福岛核事故后日本蝴蝶明显变异
<p>日本科学家研究发现，福岛核事故之后，由于受到放射性物质的影响，日本的蝴蝶品种出现了翅膀变小、眼睛发育不规则等明显的变异现象。2011年3月福岛核事故后两个月后，研究人员从日本10个不同地区采集了144只成年酢漿灰蝶样本进行研究。研究发现，核辐射越严重地区的蝴蝶，其翅膀和眼睛的变异现象越明显。研究组的一位研究人员表示，之前一直都认为昆虫的抗辐射能力很强，因此该研究得出的结论有些出人意料。6个月之后，研究人员再次从上述10个地区采集蝴蝶样本，结果发现福岛地区的蝴蝶变异几率变成了原来的两倍。研究人员指出，变异几率上升的原因一部分是因为摄入受辐射的食物，另一个原因就是基因遗传。受到辐射初期没有表现出变异症状的蝴蝶，它们的下一代可能就会表现出明显的变异症状了。该研究结果表明，虽然福岛地区的辐射残留物质已经明显减少，但对动物和环境的辐射影响仍然存在。</p><p><span word="Exposure">Exposure</span> <span word="to">to</span> <span word="radioactive">radioactive</span> <span word="material">material</span> <span word="released">released</span> <span word="into">into</span> <span word="the">the</span> <span word="environment">environment</span> <span word="has">has</span> <span word="caused">caused</span> <span word="mutations">mutations</span> <span word="in">in</span> <span word="butterflies">butterflies</span> <span word="found">found</span> <span word="in">in</span> <span word="Japan">Japan</span>, <span word="a">a</span> <span word="study">study</span> <span word="suggests">suggests</span>.</p><p><span word="Scientists">Scientists</span> <span word="found">found</span> <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="leg">leg</span>, <span word="antennae">antennae</span> <span word="and">and</span> <span word="wing">wing</span> <span word="shape">shape</span> <span word="mutations">mutations</span> <span word="among">among</span> <span word="butterflies">butterflies</span> <span word="collected">collected</span> <span word="following">following</span> <span word="the">the</span> 2011 <span word="Fukushima">Fukushima</span> <span word="accident">accident</span>.</p><p><span word="The">The</span> <span word="link">link</span> <span word="between">between</span> <span word="the">the</span> <span word="mutations">mutations</span> <span word="and">and</span> <span word="the">the</span> <span word="radioactive">radioactive</span> <span word="material">material</span> <span word="was">was</span> <span word="shown">shown</span> <span word="by">by</span> <span word="laboratory">laboratory</span> <span word="experiments">experiments</span>, <span word="they">they</span> <span word="report">report</span>.</p>
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