在南美最东端的河口和沿海地区的长期水养分变化
Ester Milena Dos Santos1, Mário Barletta2, Francisco José A Cysneiros3
1Water Resources Group, Postgraduate Program in Civil Engineering, Department of Civil Engineering of Federal University of Pernambuco, Av. Luis Freire s/n, Cidade, Universitária, 50740-550, Recife, Brazil; Laboratory of Ecology and Management of Coastal and Estuarine Ecosystems, Department of Oceanography, Federal University of Pernambuco, Av. Arquitetura s/n, Cidade Universitária, 50740-550, Recife, Brazil.
Marine pollution bulletin
|September 28, 2025
概括
巴西的河口生态系统面临着污染威胁. 氨和的含量经常超过安全限值,受降雨和ENSO等因素的影响,风险高.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 水质管理水质管理
背景情况:
- 河口生态系统连接河流盆地和海洋,对社会经济活动至关重要.
- 这些至关重要的生态系统受到家庭,工业和农业污染的威胁.
- 了解营养动力学是缓解环境退化的关键.
研究的目的:
- 为了研究氨 (NH3) 和 (P) 度的时空动态.
- 确定影响巴西河口系统营养水平的关键环境因素.
- 评估由于营养物质负载升高而导致肥胖的风险.
主要方法:
- 利用了2005-2019年NH3和P度的监测数据.
- 在数据分析中采用了位置,尺度和形状 (GAMLSS) 的通用上模型.
- 分析了环境变量的影响,如溶解氧,降雨和ENSO.
主要成果:
- NH3和P度经常超过建议的限值 (NH3 ≤0.7 mg.L-1,P ≤0.186 mg.L-1).
- 溶解的氧气,距离海岸线的距离,降雨量和ENSO显著影响了营养水平.
- 在干旱季节 (NH3 = 4.1 mg.L-1,P = 0.604 mg.L-1) 发生在大都市部门的最高度.
- 拉尼娜现象加剧了干旱期间 (2006年,2017年) 的污染物增加.
结论:
- 升高的NH3和P水平在巴西河口生态系统中构成显著的化风险.
- 环境因素,特别是ENSO放大干旱条件,极大地影响水质.
- 持续和扩展的监测计划对于有效的息地恢复和保护至关重要.
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