温度值控制了沿海生态系统中微生物介导的溶解有机碳动态
Junfu Dong1, Xiao Chen2, Fangshuai Chen2
1School of Life Sciences, Shandong University, Qingdao, 266237, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 15, 2025
概括
沿海地区的变暖影响了通过不同的微生物系统循环的溶解有机碳 (DOC). 三个温度值显示出非线性反应,影响碳捕集和微生物群落.
科学领域:
- 海洋微生物生态学
- 生物地质化学生物地质化学
- 沿海地区的碳循环.
背景情况:
- 温度显著影响沿海碳池.
- 了解温暖化对溶解有机碳 (DOC) 转化和微生物过程的影响至关重要,但有限.
- 沿海生态系统是重要的碳汇,易受气候变化的影响.
研究的目的:
- 调查广泛的温度梯度对沿海环境中微生物DOC利用的影响.
- 确定关键温度值,以确定不同的微生物DOC处理模式.
- 阐明温度,微生物群落结构,DOC分子组成和碳命运之间的关系.
主要方法:
- 在温度梯度 (7.6-35.9°C) 上进行的生物测试实验.
- 溶解有机碳 (DOC) 分子特征和微生物群体组成的分析.
- 网络分析以探索微生物DOC处理联系.
主要成果:
- 确定了三个关键温度值 (15.6,24.6和29.9°C),定义了不同的微生物DOC利用模式.
- 在15.6°C以下,独特的DOC分子被细菌转化,细菌的数量随着变暖而减少.
- 在24.6°C以上,耐变暖的微生物占主导地位,然后是热受益的微生物,导致DOC积累和增强的碳封存,特别是在29.9°C以上.
结论:
- 沿海的DOC循环表现出对变暖的非线性,值控制的反应.
- 微生物群落结构和DOC转化强烈依赖温度.
- 这些发现为预测气候变化下的沿海碳汇行为提供了关键的见解.
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