陆地溶解有机碳的输入增强了植物浮游生物-DOC和土著湖泊上的细菌生长效率DOC:一个微观宇宙研究
Zong'an Jin1,2, Huiping Zhang1,2, Zhengwen Liu1,2,3,4
1Department of Ecology and Institute of Hydrobiology, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, China.
Microorganisms
|September 27, 2025
概括
陆地溶解有机碳 (DOC) 提高了湖泊细菌生长效率,影响了微生物如何处理碳. 这凸显了气候变化下的湖泊碳循环的关键陆地-水域相互作用.
科学领域:
- 环境科学 环境科学
- 水生生态学 水生生态学
- 生物地质化学生物地质化学
背景情况:
- 全球气候变化增加了陆地溶解有机碳 (DOC) 进入湖泊的数量.
- DOC对于微生物代谢至关重要,促进了细菌的产生 (BP),也促进了细菌的呼吸 (BR).
- 细菌生长效率 (BGE = BP/(BP + BR)) 是了解湖泊碳动态的关键.
研究的目的:
- 研究陆地有机碳如何影响湖泊中的细菌碳加工.
- 量化陆地DOC对细菌生长效率和碳通路的影响.
主要方法:
- 使用湖水微观世界进行了C标签实验.
- 处理包括没有DOC添加 (控制),植物浮游生物衍生DOC,植物浮游生物和陆地DOC混合.
- 分析了细菌的生产,呼吸和碳同化途径.
主要成果:
- 陆地DOC显著增强了整体BGE (40.0%).
- 植物浮游生物-DOC (62.3%) 和土著湖泊DOC (27.0%) 的特定BGE增加,其中包括陆地输入.
- 同位素证据显示,细菌碳消耗途径发生了变化.
结论:
- 陆地DOC输入通过改变细菌对各种碳来源的利用,显著影响湖泊DOC处理.
- 对于理解湖泊碳动力学,特别是气候变化下,陆地-水域跨生态系统相互作用至关重要.
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