| 九龙江-河口表层水体营养盐含量的时空变化及潜在富营养化评价 |
| |
| 引用本文： | 候丽媛,;胡安谊,;于昌平.九龙江-河口表层水体营养盐含量的时空变化及潜在富营养化评价[J].台湾海峡,2014(3):369-378. |
| |
| 作者姓名： | 候丽媛 ;胡安谊 ;于昌平 |
| |
| 作者单位： | [1]中国科学院城市环境研究所、城市环境与健康重点实验室,福建厦门361021; [2]中国科学院宁波城市环境观测研究站,浙江宁波315800; [3]中国科学院大学,北京100049 |
| |
| 基金项目： | 国家自然科学基金资助项目（41106096）;中国科学院知识创新工程青年人才领域前沿资助项目（IUEQN201307）;宁波市科技计划资助项目（2013A610174） |
| |
| 摘 要： | 分别于2012年9月、2013年1、6月,对九龙江两大支流北溪、西溪及河口区开展了3个航次的营养盐监测.研究结果表明,河口区表层水体溶解无机氮（DIN）、总磷（TP）和活性磷酸盐（PO4-P）质量浓度范围分别为0.13-17.35、0.14-1.00和0.00-0.38 mg/dm3,受上游输入和海水稀释作用,营养盐浓度由淡水端至海水端逐渐降低.北溪表层水体的DIN、TP和活性磷酸盐质量浓度范围分别为1.99-24.92、0.12-1.47和0.04-0.68 mg/dm3,受龙岩地区工农业生产及城市进程影响,由上游至下游逐渐降低.西溪表层水体的DIN、TP和活性磷酸盐质量浓度范围分别为2.74-20.61、0.14-0.92和0.02-0.37 mg/dm3,受上游农业生产和下游漳州地区人类活动影响,上下游的DIN质量浓度较高.此外,九龙江沿岸的人类活动可能影响了该地区水体中的溶解无机氮形态组成：北溪和西溪上游的NH4-N和NO3-N占比分别较高.水期分析表明,2013年1月的DIN浓度显著高于其他水期,而不同区域TP和活性磷酸盐的水期波动不尽相同.营养盐结构分析表明,九龙江总体处于磷限制状态,但在河口及北溪部分站位,CDIN/CPO4-P比值已达到适合浮游生物生长繁殖的水平.潜在富营养化程度评价表明,九龙江河口多数站位均处于N或P限制的富营养化级别,但由于N、P营养盐的绝对浓度较高,具有水华暴发的潜在风险.
|
| 关 键 词： | 海洋化学 九龙江-河口 表层水体 营养盐 富营养化 |
Evaluation on spatial-temporal distribution of nutrients and potential eutrophication in surface waters of Jiulongjiang River and its Estuary |
| |
| Institution: | HOU Li-yuan, HU An-yi , YU Chang-ping ( 1. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; 2. Ningbo Urban Environment Observation and Research Station, Chinese Academy of Sciences, Ningbo 315800, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China) |
| |
| Abstract: | The spatial-temporal characteristics of nitrogen （N） and phosphorus （P） in the two main tributaries （North River, NR, and West River, WR） of Jiuongjiang River, and its Estuary （JR]E） were studied in September, 2012, January and June, 2013. The results indicated that dissolved inorganic nitrogen （DIN） , totalphosphorus （TP） and Soluble reactive phosphate （PO4-P） concentrations in the JRJE ranged from 0. 13 to 17.35 mg/dm3, 0. 14 to 1.00 rag/din3 and 0. 00 to 0.38 mg/dm3 , respectively. There was a pronounced decreasing trend of DIN, TP and PO4-P concentrations from riverine to marine regions because of the riverine inputs and dilution by relative oligotrophic coastal waters. In the NR, DIN, TP and PO4-P concentrations ranged from 1.99 to 24.92 mg/dm3 , 0. 12 to 1.47 rag/din3 and 0.04 to 0.68 mg/dm3, respectively. Due to increased industrial , agricultural and urban activities in Longyan area, the concentrations of DIN, TP and PO4-P decreased from upstream to downstream for all seasons. In the WR, DIN, TP and PO4-P concentrations ranged from 2.74 to 20. 61 mg/dm3, 0. 14 to 0. 92 mg/ dm3 and 0.02 to 0. 37 mg/dm3 , respectively. The concentration of DIN was significantly higher in upstream and downstream of the WR. This may be caused by the rural activity in Pinghe area and human activity in Zhangzhou area. In addition, NHa-N and NO3-N were dominant chemical species of DIN in the upstream of NR and WR, respectively, which were consistent with patterns of human activity in those areas. In temporal scale, DIN concentrations during the dry season were significantly higher than those during other sample seasons, but TP and PO4-P concentrations showed different patterns of temporal variations in the NR, WR and JRJE. Based on the results of nutrient ratios, it was suggested that phosphorus was a limiting factor in the Jiulongjiang Watershed （JRJW）. In several stations of NR and JRJE, however, nutrient conditions may be suitable for phytoplankton bloom. Although potential eutrophication asses |
| |
| Keywords: | marine chemistry Jiulong River and its Estuary surface waters nutrient eutrophication |
| 本文献已被 维普 等数据库收录！ |
|
