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太湖的蓝藻细菌繁殖:时间趋势和潜在的驱动因素
Ting Song1, Hujun Zhang1, Yanjuan Xu1
1Jiangsu Wuxi Environmental Monitoring Center, Wuxi 214121, China.
The Science of the total environment
|June 6, 2024
概括
由于植物浮游生物组成的变化和有利的天气,2023年太湖的蓝藻细菌繁殖显著减少. 这种减少有害藻类的繁殖,为管理缩的内陆湖泊提供了洞察力.
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:
- 太湖湖,一个大型的内陆湖,容易发生严重的菌繁殖,威胁其水生生态系统.
- 了解藻类繁殖强度的驱动因素对于有效的水资源管理至关重要.
研究的目的:
- 调查影响2016年至2023年太湖藻类繁殖强度的因素.
- 分析植物浮游生物群落,气候,水质和影响开花动态的人类活动的变化.
主要方法:
- 与卫星遥感数据 (Sentinel-2 MSI) 结合的现场观测.
- 利用冗余和随机森林分析来确定关键影响因素.
- 检查了植物浮游生物群落的组成,气候数据,水质参数和经济活动指标.
主要成果:
- 与2016年相比,在2023年观察到每年最大菌开花面积的显著减少76.90%,与2016年相比.
- 植物浮游生物群落结构发生了转变,菌的数量显著下降 (从82.09%-98.29%降至60.98%) 和菌密度历史低点.
- ,温度和 permanganate 指数被确定为影响 phytoplankton 结构的关键因素;降雨量减少和风速减少也导致了开花减少.
结论:
- 2023年蓝藻细菌繁殖的急剧下降归因于植物浮游生物群落结构的变化,特别是Microcystis sp.的减少.
- 有利的气象条件,改善的水质,减少的经济活动和渔业禁令在缓解花方面发挥了重要作用.
- 这些发现有助于更好地了解优质的内陆湖中的藻类繁殖过程,为管理策略提供了有价值的见解.
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