西南极半岛水域微生物群落的动态主要是由生物相互作用所塑造的
Mariia Pavlovska1, Andrii Zotov2, Yevheniia Prekrasna-Kviatkovska1
1State Institution National Antarctic Scientific Center, Kyiv, Ukraine.
Frontiers in microbiology
|July 10, 2025
概括
南极海洋微生物的季节性变化,与植物浮游生物相关的细菌主导温暖的月份. 企活动也会影响南洋这个动态的生态系统中的循环.
科学领域:
- 海洋微生物学 海洋微生物学
- 南极洲的生态系统
- 生物地质化学循环过程
背景情况:
- 南极的微生物群落面临极端,动态的条件.
- 了解植物浮游生物-细菌浮游生物的相互作用是南大洋生态系统功能的关键.
研究的目的:
- 为了分析威廉群岛的三年微生物动态.
- 为了阐明季节性和跨年植物浮游生物-细菌浮游生物相互作用.
主要方法:
- 微生物群落的高通量测序.
- 用于功能基因预测的PICRUSt2管道.
- 对跨季度和跨年数据 (2017-2020) 的分析.
主要成果:
- 在细菌种群中观察到明显的季节性变化,异质型细菌在春夏期间占主导地位,秋季则是寡质型种群.
- 植物浮游生物群 (Bacillariophyceae,Coccolithophyceae,Dinophyceaea) 与特定的细菌 (Sulfitobacter,Yoonia) 相关联. 植物浮游生物群是植物生长过程中的重要组成部分.
- 细菌浮游生物的代谢潜力因季节性变化而变化,多糖分解和DMSP脱甲基化的基因增加,以及与企影响相关的尿酸降解增加.
结论:
- 季节性植物浮游生物的动态显著结构南极细菌浮游生物群落.
- 微生物的代谢功能高度适应季节性变化和特定的藻类繁殖.
- 企种群影响南大洋海洋生态系统中的营养循环.
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