在北极水库中堆积后,生态和生物地质化学变量的峰值和过渡动态
Gabrielle Trottier1, Alain Tremblay2, François Bilodeau2
1Université du Québec en Outaouais (UQO) and Institut de recherche sur la Forêt tempérée (ISFORT), 58 rue Principale, Ripon, QC J0V1V0, Canada.
The Science of the total environment
|February 27, 2024
概括
水库的灌影响淡水生态系统,改变生物地化学循环和生态变量. 这项研究揭示了40年来这些变化的顺序模式,温室气体排放率首先达到峰值.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 水文学的水文学
背景情况:
- 储水库占全球淡水的10%,在排水后显著改变了河流生态系统.
- 沉积影响水文系统,影响生态和生物地化学过程,包括营养和碳循环,以及温室气体 (GHG) 排放.
- 长期数据对于理解这些变化的生态系统的短暂动态至关重要.
研究的目的:
- 通过使用40年数据集,检查北极水库中生态和生物地球化学变量的过渡动态和共同变化.
- 描述河流被灌后发生的变化的顺序和时间.
主要方法:
- 分析了来自Hydro-Québec北极水库的独特40年时间序列数据集,包括填埋前后的数据.
- 在八种可信的场景中应用曲线拟合分析.
- 利用模型选择来识别重要的模式和预测变量动态.
主要成果:
- 大多数变量都呈现出形的模式,在封存后增加然后减少 (8个变量中的6个).
- 温室气体 (CO2,CH4) 排放最早达到峰值,其次是和叶绿素a.
- 鱼类中的总分别在非鱼类动物和鱼类动物中达到峰值,恢复时间从9年到40年不等.
结论:
- 水库的灌引发了一系列可预测的生态和生物地球化学变化.
- 该研究提供了对这些变量的过渡性和共同变量的全面描述.
- 这些发现提供了关于水库形成对水生生态系统的长期影响的关键见解.
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