清水湖的快速缩:从质量平衡分析中推断出的趋势和潜在原因
Thomas Gonsiorczyk1, Michael Hupfer2,3, Sabine Hilt4
1Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany.
Global change biology
|November 15, 2024
概括
湖泊内部的过程,而不仅仅是外部的投入,可以推动快速的肥化. 水生植物和沉积物化学的变化会产生反循环,增加含量,加速清水湖泊的生态衰退.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 生物地质化学生物地质化学
背景情况:
- 清水湖正在经历越来越多的缩,原因尚不清楚.
- 增加的总 (TP) 和低磁性无氧是关键症状.
- 内部湖泊过程被怀疑是TP增加的驱动因素.
研究的目的:
- 为了调查一个深度温带清水湖中肥胖的原因.
- 了解内部流程在TP迅速起中的作用.
- 探索沉积物生物地质化学,巨型植物转移和P循环之间的联系.
主要方法:
- 对长期水化学数据的分析.
- 多年沉积物陷测量和沉积物分析.
- 简单质量平衡模型的应用.
主要成果:
- 与内部流程相关的TP度在十年内增加了四倍.
- 增加季节性TP变化,部分与氧气水平脱.
- 浅层地区的沉积物充当了净P来源,由巨变迁和硫化物形成驱动.
结论:
- 复杂的相互作用,包括沿海区域的过程,推动了湖泊的快速环氧化.
- 沉浸的巨型植物和沉积物生物地球化学的变化为P.释放创造了积极的反循环.
- 沿海过程可能是全球湖泊缩趋势的低估驱动因素.
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