河流淡水的流出增加了城市化亚热带河口的海洋酸化
Qinyu Liu1, Jianfang Chen2, Fei Lan3
1Ocean College, Zhejiang University, Zhoushan 316021, China; School of Marine Sciences/Guangdong Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-Sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; Donghai Laboratory, Zhoushan, Zhejiang 316021, China.
Marine pollution bulletin
|April 17, 2025
概括
碳酸盐和有机物质的河流输入显著影响河口酸化. 由有机物驱动的酸性化,由城市发展放大,构成全年威胁,超过了缩的影响.
科学领域:
- 环境科学 环境科学
- 海洋学 海洋学 海洋学
- 河口生态学 河口生态学
背景情况:
- 海洋酸化是对河口生态系统的主要威胁.
- 研究主要侧重于以缩为驱动的酸化,忽视了其他河流输入.
- 珍珠河河口 (PRE) 是研究这些影响的关键系统.
研究的目的:
- 调查河流碳酸盐和有机物对PRE中的酸化的影响.
- 为了区分有机物驱动的酸性化和由环氧化引起的酸性化的影响.
- 评估河流与海洋混合的作用和淡水末端成员的变化.
主要方法:
- 分析了从2015年4月到2016年1月收集的现场数据.
- 研究溶解无机碳 (DIC) 和总度 (TA) 的动态.
- 对不同盐度梯度和季节的酸化影响进行比较.
主要成果:
- 河流与海洋混合主要控制DIC和TA,季节性变化与淡水输入有关.
- 河流输入具有较高的DIC:TA比率,减少河口缓冲能力并放大CO2驱动的酸化.
- 人类产生的有机物增强呼吸,加剧了酸性化,特别是在上游河口全年,pH值下降到1.01单位.
结论:
- 河流碳酸盐和有机物输入是PRE河口酸化的重要驱动因素.
- 由有机物驱动的酸化,由城市化加剧,构成了普遍和实质性的威胁.
- 了解这些非化途径对于河口生态系统的管理和保护至关重要.
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