南极的林德斯岛(Galindez Island)被科学家拍到,原本应该是一片纯白雪的大地,竟然变成一片如血染过的红,大量极地雪藻存在证明气候变迁,令人担忧。
海洋生态学家佐托夫(Andrey Zotov)拍下了长年白雪覆盖的南极,变成了一片血红的惊人画面。他将照片上传到脸书,经过显微镜鉴定,发现这片血红是“极地雪藻”在迅速增生产生的景象。这些生物会在冬天冬眠,当阳光变多、雪地出现液态水就会吸收水分,苏醒并且快速繁殖。
幼期的极地雪藻因有叶绿素,因此会呈显绿色,后来会因为含有类胡萝卜素以及虾青素而逐渐转为橘红色,它们有细胞壁能抵挡紫外线的辐射,也能吸收能量融化更多雪,这能证明南极气温比以前来得更高,也显示了暖化日趋严重。
科学家研究指出,融冰出现多的地方藻类会大幅增加,而藻类多的地方又会让雪融得更快,会出现大量极地藻类,等于该地的气温变高,2月13日探测器附近的西摩岛达到破纪录的20.75度高温,这也是南极洲第一次单日破20度,情况令人担忧。
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