日照近岸海域水体营养盐时空分布特征  

Temporal and Spatial Distribution of Nutrients in Rizhao InshoreWaters

作　　者：张亮 纪莹璐 陶卉卉 宿凯 侯继灵 蒲思潮 张海舟 ZHANG Liang;JI Yinglu;TAO Huihui;SU Kai;HOU Jiling;PU Sichao;ZHANG Haizhou(Shandong Provincial Key Laboratory of Marine Ecology and Environment and Disaster Prevention and Mitigation,Qingdao 266061,China;North China Sea Forecast and Mitigation Center,Ministry of Natural Resources,Qingdao 266061,China)

机构地区：[1]山东省海洋生态环境与防灾减灾重点实验室,山东青岛266061 [2]自然资源部北海预报减灾中心,山东青岛266061

出　　处：《广东海洋大学学报》2023年第5期11-18,共8页Journal of Guangdong Ocean University

基　　金：自然资源部北海局海洋科技项目(202302)。

摘　　要：【目的】研究日照近岸海域水体营养盐时空分布特征。【方法】根据2018年2、5、8、10月在日照近岸海域开展的海洋环境调查数据,分析该海域营养盐质量浓度的时空分布情况,并对海水的富营养化状况进行评价。【结果与结论】无机氮(DIN)和活性磷酸盐(PO4-P)质量浓度在秋、冬季均高于春、夏季,活性硅酸盐(SiO_(3)-Si)质量浓度季节变化不明显。水平区域分布上,4个季节DIN和PO4-P质量浓度分布均呈调查海域西南部高于东北部,高值区域均位于海州湾北部海域;SiO_(3)-Si质量浓度总体上呈近岸调查海域高、外海低的分布特征。相关性分析表明,4个季节盐度与营养盐质量浓度呈负相关性;叶绿素a与营养盐质量浓度均呈正相关性;冬季化学需氧量(COD)与营养盐质量浓度呈负相关性,其余季节呈正相关性。四季调查各站位DIN和PO_(4)-P质量浓度均符合《海水水质标准》(GB3097—1997)二类标准。夏季调查中有1个站位出现富营养化现象,其余季节调查无富营养化现象。营养盐结构分析表明,日照近岸海域营养盐结构为相对磷限制状态。【Objective】In order to know the temporal and spatial distribution of nutrients in Rizhao inshore waters.【Method】Based on the marine environmental investigation data conducted in Rizhao inshore waters in February,May,August and October 2018,the spatiotemporal distribution of nutrients in the sea area were analyzed,and the eutrophication status of seawater was evaluated.【Result and Conclusion】The results showed that the concentrations of DIN and PO4-P were higher in autumn and winter than in spring and summer,and the seasonal variation of SiO_(3)-Si was not significant.The concentrations of DIN and PO4-P in the four seasons were higher in the southwest of the surveyed sea area than in the northeast,and the high value areas were all located in the northern sea area of Haizhou Bay.Overall,SiO_(3)-Si showed a distribution characteristic of high in nearshore sea areas and low in offshore sea areas.Correlation analysis showed that there was a negative correlation between salinity and nutrients in the four seasons,a positive correlation between chlorophyll-a and nutrients,a negative correlation between COD and nutrients in winter,and a positive correlation in other seasons;The DIN and PO_(4)-P of each station in the four seasons survey comply with the ClassⅡstandard in the“Sea Water Quality Standard”(GB3097-1997).In the summer survey,one station experienced eutrophication,while in the other seasons,there was no eutrophication observed.The analysis of nutrient structure showed that the nutrient structure in Rizhao inshore waters was in a relatively phosphorus-limited state.

关 键 词：日照近岸 营养盐 时空分布 季节变化 富营养化 

分 类 号：P76[天文地球—海洋科学]