北戴河沿岸海域溶解氧变化分析

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中图分类号：X55；P7 文献标志码：A 文章编号：1005-9857（2025）12-0092-10

AnalysisofDissolved OxygenVariationinthe Coastal WatersofBeidaihe

WANG Quanying1²， ZHANG Jianle12， ZHANG Yong12， ZHANG Wanleil，2，CHU Qinqin1²，ZHANG Yongfeng1²，ZHAO Jie12

（1.Qinhuangdao Marine Center，MNR，Qinhuangdao O66o02，China; 2.Qinhuangdao Marine Forecast Station，MNR，Qinhuangdao O66oo2，China）

Abstract：Dissolved Oxygen（DO），an important indicator reflecting changes in marine water quality，plays a significant role in maintaining thebalance of marine ecosystems.Based on monitoring data collcted from three buoys inthe coastal waters ofBeidaihe during the summer of2O24，this study analyzed the spatiotemporal distribution characteristics ofDOand itscorrelations withenvironmental factors.Theresults indicatedthatthelowestdaily average valuesof DO in the summer for the Laohushi and Jinshanzui areas occurred in late July，at 5.67mg/L and 5.39mg/L respectively，while the lowest value in the Yanghekou area was in early August，at 6.28mg/L ．Afterlate July，there was a sharp increase in precipitation，leading to significant fluctuations in DO concentrations.On

August 24th，the maximum daily average values of DO for the summer were observed simultaneously in the three areas of Laohushi，Yanghekou，and Jinshanzui，which were 10.37mg/L ， 11.22mg/L ，and 11.41mg/L respectively.The highest DO value within the day occured between16：00 and 17：30，and the lowest value occured between 6：00and7：30．Pearson correlation analysis revealed thatDO concentration in the threeareasof Laohushi，Yanghekou，and Jinshanzui was significantly positively correlated with pH ，Chlorophyll-a（ Chla ）， and Atmospheric Pressure（AP）.Path analysis of the main environmental factors affecting DO concentration indicated that DO concentration in Laohushi and Jinshanzui areas was mainly influenced by pHand Chla ，while in the Yanghekou area，it was primarily affected by pH.

Keywords：Beidaihe，Dissolved Oxygen，Multiple stepwise regression，Path analysis

0 引言

DO是海洋生态系统中的重要生源要素，也是鱼类和贝类等重要海洋经济物种维持正常生存、生长和繁殖的关键生态因子，对维持海洋生态系统稳定具有极其重要的作用[1]。（剩余14340字）