气候变化引发了浮游生物蓝藻细菌在一个受调节的温带河流中开花
Julia Kleinteich1, Marieke A Frassl2, Manoj Schulz2
1Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany. Kleinteich@bafg.de.
Scientific reports
|July 15, 2024
概括
气候变化正在导致监管河流中罕见的有害藻类繁殖. 干燥而温暖的天气导致莫塞尔河的蓝藻细菌繁殖,原因是流量低和温度高.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 临界技术 临界技术
背景情况:
- 在河流中越来越多地观察到有害藻类繁殖 (HAB),这与气候变化和河流调节有关.
- 在受监管的莫塞尔河中,蓝藻细菌的繁殖,特别是Microcystis,在历史上是罕见的.
- 长期数据 (1997-2016) 提供了一个基线,可以与最近的花事件进行比较.
研究的目的:
- 调查2017年至2020年间在莫塞尔河 (Moselle River) 中广泛的蓝藻细菌繁殖的控制因素.
- 为了将当前的开花条件与20年的历史数据集进行比较.
- 了解气候变化和河流监管对浮游植物群落的影响.
主要方法:
- 从2017年到2020年,在莫塞尔河测量了物理化学和生物变量.
- 数据与长期数据集 (1997-2016) 进行了比较,以确定变化.
- 研究人员寻求环境因素和蓝菌繁殖发生之间的统计相关性.
主要成果:
- 在夏末 (2017-2020年) 的植物浮游生物中,蓝藻细菌 (Microcystis) 占主导地位,达到高达110微克的甲基a/L.
- 这些花在过去的20年里是前所未有的.
- 河流排水量减少 (69-76%) 和水温升高 (0.9-1.8°C) 是花期的特点.
- ,和二氧化的含量有所下降,但仍然没有限制.
- 开花与低排放,高水温和低酸盐度有很强的相关性.
结论:
- 莫塞尔河最近的蓝藻细菌繁殖归因于干燥,温暖的天气条件.
- 在受管制的河流中,低流量和水温升高,为开花创造了有利的条件.
- 在气候变化预测下,莫塞尔河是监管温带河流未来开花事件的潜在指标.
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