从双同位素的角度来看,揭示了中国南部一个化的海湾的活性酸盐和酸盐循环
Zixuan Li1, Hantao Zhou1, Minfang Zheng1
1College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
Marine environmental research
|March 13, 2025
概括
营养污染威胁到沿海生态系统. 这项研究揭示了门湾明显的循环,由干旱季混合和潮湿季微生物过程驱动,影响海洋健康.
科学领域:
- 海洋化学和生物地球化学
- 生态系统动态生态系统动态
- 环境科学环境科学
背景情况:
- 沿海水域因营养物质负载增加而面临威胁.
- 了解循环动态对于管理城市化的沿海生态系统至关重要.
- 稳定同位素分析为营养来源和转化提供了洞察力.
研究的目的:
- 为了研究门湾未经研究的气循环动态.
- 要区分物理混合和影响的微生物过程.
- 确定主要酸盐来源和酸盐变异的驱动因素.
主要方法:
- 对酸盐 (δ15N, δ18O) 和酸盐的稳定同位素分析.
- 在R (SIAR) 模型中应用稳定同位素分析用于源识别.
- 使用雷利分成模型来评估微生物过程.
主要成果:
- 在干旱和雨季之间观察到物理混合和微生物转换的脱.
- 在干旱季节,肥料 (50%) 被确定为主要的酸盐来源.
- 微生物过程,特别是氨和酸盐氧化,在雨季主导了循环.
结论:
- 门湾的气循环非常动态,受季节变化的影响.
- 沿海水域的不同环境因素会影响微生物的转化.
- 进一步的研究对于在人类影响和气候变化下有效管理沿海系统至关重要.
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