研究人员发现,北极海冰的加速消融导致了关键营养物质硝酸盐含量急剧下降,扰乱了食物链,影响了浮游生物、鱼类、海鸟和海洋哺乳动物的种群数量。分析显示,曾被冰层覆盖的大片浅海区域暴露在阳光下,加速了硝酸盐的分解。硝酸盐对食物链底层的浮游生物的生长至关重要,其含量下降限制了生态系统能维持的生物数量。对北极冰水流入大西洋的主要通道 Fram 海峡逾二十年采样数据的分析发现,从 2009 年起北极水域的硝酸盐含量持续下降。硝酸盐含量的下降与北极海冰的急剧减少几乎同时发生。研究人员表示,由于营养状况的变化是由持续的海冰消融造成的,北冰洋几乎不可能恢复到之前的状态。
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Title: 奇客Solidot–传递最新科技情报