Jinan Environmental Research Academy, Jinan 250000, China.
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Int J Environ Res Public Health. 2022 Dec 16;19(24):16951. doi: 10.3390/ijerph192416951.
Many aquatic ecosystems are eutrophicated due to human inputs of nitrogen and phosphorus. Therefore, it is now considered important to establish nutrient criteria to prevent eutrophication. In this study, the water quality and biological data for 26 stations in the lower reaches of the Haihe River Basin were collected. The total nitrogen (TN) and total phosphorus (TP) ecological thresholds were derived from the threshold indicator taxa analysis (TITAN) and frequency distribution approach. The results showed that the TN threshold was 1.8 mg/L based on the TITAN and the TP threshold was 0.039 mg/L based on the frequency distribution approach. The TITAN also identified 29 indicator species of TN and 28 indicator species of TP. Based on these criteria, we found 73% sites with TN concentrations higher than the 1.8 mg/L. As for TP, 58% sites exceeded 0.039 mg/L. This study showed that most of the downstream areas of the Haihe River are subject to relatively serious disturbances. This finding could provide implications for identifying the water quality traits of and generating protection strategies for the Haihe River in Tianjin.
由于人类向水体中输入氮和磷，许多水生态系统已经富营养化。因此，现在人们认为建立营养物标准来防止富营养化是很重要的。本研究收集了海河下游 26 个站位的水质和生物数据。采用阈值指示种分析（TITAN）和频率分布方法得出了总氮（TN）和总磷（TP）的生态阈值。结果表明，TITAN 法得出的 TN 阈值为 1.8mg/L，频率分布法得出的 TP 阈值为 0.039mg/L。TITAN 还确定了 29 种 TN 指示种和 28 种 TP 指示种。基于这些标准，我们发现有 73%的站点 TN 浓度高于 1.8mg/L。对于 TP，有 58%的站点超过了 0.039mg/L。本研究表明，海河下游的大部分地区都受到了较为严重的干扰。这一发现可为识别天津海河的水质特征和制定保护策略提供启示。
