繁殖诱导的内部释放控制动力学在大浅 eutrophic 湖台湖,中国,中国
Lijuan Kang1, Guangwei Zhu1, Mengyuan Zhu2
1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Environmental research
|May 28, 2023
概括
沉积物的内部负荷对湖泊动力学产生重大影响,在藻类繁殖期间经常超过外部输入. 这种由开花驱动的内部负荷是营养不良湖泊管理的关键因素.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 生态系统动力学 生态系统动力学
背景情况:
- 湖泊中的高 (P) 度通常与藻类繁殖相吻合,尽管外部营养减少努力.
- 内部P负荷对整体湖泊P动态的具体贡献,特别是在开花期间,尚不清楚.
研究的目的:
- 量化内部P负荷对P动态在一个大,浅的,温湖的影响.
- 为了比较花引起的内部负荷与风暴引起的外部负荷对湖泊P储量的影响.
主要方法:
- 从2016年到2021年,在太湖及其支流中进行了广泛的空间和多频度营养监测.
- 估计的湖内P储量 (ILSP) 和外部负载.
- 使用质量平衡方程量化内部P负荷.
主要成果:
- 湖内总P储量 (ILSTP) 差异很大,从398.5到1530.2不等.
- 沉积物每年的内部TP负载平均占外部输入的115.6%,导致每周ILSTP波动.
- 繁荣诱导的ILSTP增加了136.4% (2017年),而风暴诱导的外部负载增加了47.2% (2020年).
结论:
- 花引起的内部负荷和风暴引起的外部负荷都抵消了在浅湖的流域营养减少工作.
- 繁荣诱导的内部负荷是P动态的更重要的短期驱动因素,而不是风暴诱导的外部负荷.
- 内部负载和生态系统的恢复对于管理缩的浅湖至关重要,特别是在容易开花的地区.
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