月球南极微生物生命的潜在可生存生态位
Potential survivable niches for microbial life on the lunar south pole
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中文总结 AI 辅助
该研究结合遥感与高分辨率光照模型，发现月球南极存在大量持续低温、紫外线通量低的区域，可能具备微生物生存条件，提示需关注载人探索带来的生命转移风险。
中文摘要 AI 辅助
月球表面的大多数条件对于微生物生存而言极为严酷：强紫外线辐射、极端温度以及高能粒子辐射限制了大多数未受保护的月球表面的微生物生存，尤其是此前所有载人探索活动开展的赤道区域。然而，考虑到地形效应，月球极地是否广泛存在这类严酷条件尚未得到研究。本文中，我们结合近期微生物生存能力数据与月球表面遥感数据，揭示了月球极地区域可能存在的可生存生态位。通过利用遥感数据与高分辨率光照模型分析地形及纬度驱动的表面条件，我们发现月球南极拥有大量持续低温且紫外线通量较低的区域。将这些条件与特定微生物的生存能力数据对比后，我们发现月球极地的大片区域可能具备适合微生物生存的表面条件。我们的研究结果表明，月球极地区域对微生物生存的敌意可能比此前假设的要小。这一结论不包含微生物生长的可能性，仅指隐生状态下的生存——当存在宜居条件时，微生物即可恢复生长。鉴于近期多项计划中的月球南极载人探索任务可能会将大量受检微生物带到月球，月球极地的潜在微生物生存能力具有特殊重要性。精心规划探索活动并追踪其影响，是限制和理解向月球意外转移生命的关键。
英文摘要
Most lunar surface conditions are incredibly harsh for microbial survival. High ultraviolet radiation, temperatures, and energetic particle radiation limit survival over most unprotected lunar surfaces, particularly in equatorial regions where all previous crewed exploration occurred. However, whether these harsh conditions are widespread at lunar poles has not been examined considering topographical effects. Here, we show that recent microorganism survivability data and lunar surface remote sensing reveal likely survivable niches in lunar polar regions. Analysis of topography and latitude-driven surface conditions using remote sensing data and high-resolution illumination models indicates the lunar south pole possesses significant regions with persistent low temperatures and ultraviolet flux. Comparing these conditions to survivability data of specific microorganisms, we find significant lunar polar areas likely possess surface conditions amenable to microbial survival. Our findings suggest lunar polar regions may be less hostile to microbial survival than previously assumed. This does not encompass growth likelihood, but survival in a cryptobiotic state where growth would be possible if habitable conditions were present. Potential microbial survivability at lunar poles is particularly significant given many examined microbes will likely be transported to the Moon during crewed lunar south pole exploration planned in numerous near-term missions. Thoughtfully planning exploration and tracking its impact is key to limiting and understanding potential unintended life transfer to the Moon.
