与生长阶段相关的气相关的DOM结构,微生物继承和碳-营养合在底层气床中的气床
Xiao-Li Ou1, Long-Long Huang1, Qiu-Jie Wang1
1College of Life Science and Technology, Jinan University/Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou, 510632, China.
Marine environmental research
|November 12, 2025
概括
藻释放的溶解有机物 (DOM) 塑造了微生物和浮游生物群落. 这项研究揭示了DOM如何随着Sargassum生长阶段的变化而改变,影响营养循环和海洋生态系统.
科学领域:
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
- 微生物生态学 微生物生态学
背景情况:
- 地石灰层的天窗显著影响着覆盖的水化学和生物.
- 由体释放的溶解有机物 (DOM) 影响微生物和浮游生物的动态.
- 了解这些相互作用对于沿海生态系统管理至关重要.
研究的目的:
- 为了研究藻的生长阶段如何影响营养固态度,DOM特征,细胞外酶活动 (EEAs) 和微生物群落.
- 阐明与生长阶段相关的DOM在构建海洋食物网和生物地球化学循环中的作用.
- 为生态系统建模和蓝色碳管理策略提供见解.
主要方法:
- 在州岛上跨越体生长阶段 (初始生长,峰值,衰老) 的采样.
- 营养体质分析 (DIN,DIP,DSi) 的分析.
- 使用光学特性 (BIX,HIX,SUVA254) 进行光DOM (FDOM) 和色彩DOM (CDOM) 的表征.
- 测量细胞外酶活性 (EEA).
- 使用分子技术评估微生物群 (细菌和浮游植物).
主要成果:
- 的峰值增长与低溶解无机 (DIN) 和 (DIP),高溶解酸盐 (DSi),增加类似蛋白质的DOM和更高的EEAs相关.
- 细菌群落转向Bacteroidia和Alphaproteobacteria,在峰值生长期间增强了纳米浮游生物和Coscinodiscophyceae.
- 在衰老过程中,DIN和DIP水平恢复,类似的DOM特征增加,微型浮游生物 (Mamiellophyceae) 再次出现.
结论:
- 体的生长阶段依赖的DOM释放是近岸环境中细菌继承和浮游植物组成的关键驱动因素.
- 这些发现突显了藻类现象学,营养循环和微生物食物网之间的复杂联系.
- 该研究为生态系统模型提供了信息,并通过详细介绍萨加索姆的生态作用,支持有效的蓝色碳管理.
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