沉积物形式和细菌群落对三种水下巨型生物类生态处理系统中不同水中条件的反应
Xinyan Zhou1, Tiehan Cheng1, Jiaming Yu1
1College of Environment and Resources, College of Carbon Neutrality, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China.
Environmental research
|June 15, 2023
概括
生态处理系统 (ETS) 表明,水中的条件对沉积物中形式和细菌群体产生重大影响. 植物类型和时间也会影响潜水巨型植物系统的变化.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态毒理学 生态毒理学
背景情况:
- 生态处理系统 (ETS) 对于减轻农业非点污染至关重要.
- 了解ETS沉积物的 (N) 动态和微生物反应至关重要.
- 潜水中的巨细胞在这些系统内的营养循环中发挥作用.
研究的目的:
- 调查不同水中条件对ETS中的沉积物N形式和细菌群落的影响.
- 为了比较ETS的反应,植物与不同的水下巨型植物 (Potamogeton malaianus,Vallisneria natans) 和人工植物进行了植被.
- 分析时间和植物类型对沉积物N轮和细菌群落结构的影响.
主要方法:
- 进行了为期四个月的微观实验,使用了三种不同的水生N条件.
- 分析四种可转移的N分数 (离子交换,弱酸,强氧化剂,强可提取).
- 使用分子技术对沉积物细菌群落和功能基因 (N固定,化,DNRA,脱) 的表征.
主要成果:
- 水中N条件主要决定了离子交换和弱酸分数中的N价值状态.
- 在强氧化剂和强提取分数中发生了显著的N积累.
- 沉积物N形状主要受时间和植物类型的影响,N条件具有次要影响.
- 细菌社区结构随着时间的推移而显著转变,并受到植物类型的轻微影响.
- 与N循环相关的功能基因在第4个月得到了丰富.
- 在酸盐 (NO3-) 条件下,细菌共发生网络更稳定.
- 特定的沉积物N分数与化,非化和DNRA细菌相关.
结论:
- 水中的条件对沉积物中的形式和细菌群落在沉浸的巨型生物类型ETS中产生重大影响.
- 沉积物N动态和微生物社区结构复杂,受N负载,时间和植物物种的影响.
- 这些发现为优化ETS设计和管理提供了关键的见解,以有效地去除营养.
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