在格陵兰海跨度 (75°北度) 上, Prokaryotic 的生命力和活性新陈代谢
Alessandro Ciro Rappazzo1, Gabriella Caruso1, Alessandro Cosenza1
1Institute of Polar Sciences, National Research Council, Spianata S. Raineri 86, Messina, 98122, Italy.
AIMS microbiology
|January 12, 2026
概括
这项研究评估了格陵兰海 prokaryotic 活力和呼吸,发现微生物群落适应极端条件. 营养水平显著影响了不同水体内的微生物活动.
科学领域:
- 海洋微生物学 海洋微生物学
- 北极海洋学 北极海洋学
- 生物地质化学生物地质化学
背景情况:
- Prokaryotic 社区对于海洋生态系统的运行至关重要.
- 了解像北极这样的极端环境中的微生物活动至关重要.
- 之前对格陵兰海中 prokaryotic 活力和呼吸的评估是有限的.
研究的目的:
- 在格陵兰海75°N横段进行初次对 prokaryotic 生存能力和呼吸活动的综合评估.
- 研究北极水域微生物参数和环境变量之间的关系.
- 确定 prokaryotic 社区在低温海洋环境中的适应策略.
主要方法:
- 在CASSANDRA巡航 (2021年9月) 期间采集了海水样本.
- 活/死 Bac光活力染色 (L/D) 用于量化活性的细胞.
- 五二三丁四化物 (CTC) 染色量化代谢活性细胞.
主要成果:
- 总 prokaryotic 丰富度从 0.13 到 8.8 × 10^5 细胞 mL^-1.
- 代谢活跃 (CTC+) 细胞占 prokaryotic 总数的 0.1-12%.
- 活性的细胞占社区的7-48%,活动随着深度的增加而显著增加.
结论:
- 格陵兰海的原生生物群落适应了极端环境.
- 微生物活动与营养度 (酸盐,酸盐) 有显著的相关性.
- 环境因素,特别是营养素,在塑造北极微生物群落方面发挥着复杂的作用.
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