上游的可用性决定了Microcystis的盐耐受性,并影响了微囊在水中的释放
Xinlu Li1, Lei Li2, Yingying Huang1
1Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
Water research
|February 2, 2024
概括
像Microcystis这样的淡水蓝藻细菌在盐水中生存,这是由于上游条件而不是当地开花. 上游水域中碳水化合物含量较高和含量较低会提高Microcystis的盐分耐受性和毒素积累.
科学领域:
- 环境微生物学环境微生物学
- 水生生态学 水生生态学
- 蓝藻细菌的开花动态 菌的开花动态
背景情况:
- 盐水中的大微囊生物质来源于淡水源,而不是现场开花.
- 影响淡水蓝藻在水环境中的生存因素仍然不太清楚.
研究的目的:
- 研究的可用性对Microcystis盐耐受性和微囊素释放的影响.
- 评估上游生理性质对下游水生存的作用.
主要方法:
- 在上游湖中研究了时空无机的变化.
- 在实验室和现场实验中对微囊的盐分耐受性进行了实验.
- 在花季期间自然Microcystis殖民地评估盐分耐受性值.
主要成果:
- 盐耐受性值 (7-17 PSU) 与细胞内碳水化合物正相关,与的可用性负相关.
- 在低上游气条件下,微囊在增加的盐度 (4-10 PSU) 中存活下来.
- 当盐度超过盐耐受性值时,微囊会急剧释放出来.
结论:
- 上游生理状态,特别是碳水化合物含量和的可用性,决定了微囊的生存率和水中的毒素水平.
- 上游环境中的生命史显著影响下游的盐分耐受性和生态风险.
- 在水中耐盐性微囊的管理需要在夏季低期间注意.
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