科学家从解冻的阿拉斯加永久冻土中恢复了40 000年的微生物,引起气候关切。 Scientists revived 40,000-year-old microbes from thawing Alaskan permafrost, raising climate concerns.

科学家们从阿拉斯加的永久冻土中恢复了微生物,这些微生物已经冻结了多达40 000年,在大约六个月的解冻后,活动才变得引人注目。 Scientists have revived microbes from permafrost in Alaska that had been frozen for up to 40,000 years, with activity only becoming noticeable after about six months of thawing. 研究人员利用标签水跟踪缓慢的微生物生长,最终看到可见的生物膜形成。 Using deuterium-labeled water, researchers tracked slow microbial growth, eventually seeing visible biofilms form. 该研究于2025年9月发表,发现长期变暖,而不是短暂的热峰值,很可能导致微生物活动增加和潜在的温室气体排放。 The study, published in September 2025, found that prolonged warming, not short heat spikes, likely drives increased microbial activity and potential greenhouse gas emissions. 虽然恢复的微生物不构成已知的健康风险,但它们的恢复凸显了人们对气候变化加速永久冻土解冻和释放储存的碳的关切。 While the revived microbes pose no known health risk, their reactivation highlights concerns about climate change accelerating permafrost thaw and releasing stored carbon. 一个阿拉斯加站点的结果可能不能反映全球模式,因此需要在北极各个区域开展进一步研究。 Results from one Alaskan site may not reflect global patterns, so further research is needed across Arctic regions.