通过高水产养殖废水输入的营养丰富会加剧林沉积物中甲生产和氧化之间的不平衡
Zetao Dai1, Yujie Li1, Yanlong Zhang1
1Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China.
Water research
|April 2, 2025
概括
水产养殖废水通过改变微生物群落和沉积碳来显著增加红树林的甲排放. 这凸显了管理营养投入的必要性,以保护这些重要的生态系统.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 水产养殖将营养物质引入红树林,影响生态系统.
- 营养丰富对甲排放和微生物群落的影响还未得到充分研究.
研究的目的:
- 在不同排放水位下调查甲 (CH4) 排放和红树林中微生物群落的转移.
- 确定营养丰富对温室气体 (GHG) 流量和碳循环的影响.
主要方法:
- 静态室法用于气体排放测量.
- 基于16S rRNA和元基因组测序用于微生物社区分析.
- 随机森林和PLS建模用于数据解释.
主要成果:
- 在高输入下,废水输入使沉积物碳损失增加了一倍,而CH4排放量增加了243.3%.
- 甲原体和甲类植物群落的变化是CH4排放变化的关键驱动因素.
- 营养丰富导致溶解有机碳 (DOC) 的增加,有利于CH4生产而不是氧化.
结论:
- 收到水产养殖废水的红树林作为重要的CH4排放反应堆.
- 营养丰富破坏了CH4生产和氧化的平衡,增加了流量.
- 水产养殖废水的管理对于减轻温室气体排放和保护红树林中的蓝色碳至关重要.
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