Journal of Tropical Oceanography >
Analysis of water environmental changes and influencing factors in the southwestern waters of the Daya Bay based on continuous monitoring data from dual buoys
Copy editor: SUN Cuici
Received date: 2023-08-29
Revised date: 2023-09-26
Online published: 2023-12-13
Supported by
National Natural Science Foundation of China(42141003)
Key Program of Guangdong Basic and Applied Basic Research Fund (Guangdong-Shenzhen Joint Fund)(2021B1515120080)
Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology(ZDSYS201802081843490)
Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation(pdjh2022c0029)
The monitoring of water quality is very important to understand the changes in marine ecosystem. Based on the continuous monitoring data of two buoys in the southwest of the Daya Bay from 2022 to 2023, this paper analyzes the time series changes in water quality environment. The results showed that the temperature and salinity in the southwest of the Daya Bay were affected by solar radiation and precipitation, with obvious seasonal differences. The temperature and salinity were high in summer and low in winter; chlorophyll a, dissolved oxygen and pH showed obvious diurnal changes. In summer and autumn, the Dapeng Cove was characterized by high temperature, low salinity, low dissolved oxygen, low pH, and high chlorophyll a compared with the Yangmeikeng. Pearson correlation analysis showed that there was a significant correlation among temperature, salinity, dissolved oxygen, pH, and chlorophyll a in summer and autumn, and there were regional differences. Near the bay mouth, waves, upwelling, and other water movements may be the main influencing factors; nearshore, the increase of runoff input may be the primary dominant factor causing changes of water quality. In addition, this article also recorded the impact of distant typhoons causing waves and precipitation events, thus affecting the environment of the Daya Bay. Analyzing the characteristics of the changes in the time series of coastal environmental parameters has important implications for studying the evolutionary characteristics of marine ecosystems.
XI Chen , LIN Zongxuan , SA Rula , DENG Xi , LIU Qiang , NI Liang , LUO Laicai , MA Teng , XIE Zhijie , CHEN Siruo , CHEN Songze . Analysis of water environmental changes and influencing factors in the southwestern waters of the Daya Bay based on continuous monitoring data from dual buoys[J]. Journal of Tropical Oceanography, 2024 , 43(4) : 153 -164 . DOI: 10.11978/2023130
表1 浮标站位坐标与采样的时间范围Tab.1 Buoy station coordinates and sampling time range |
站位 | 纬度 | 经度 | 水深/m | 时间 | 备注 |
---|---|---|---|---|---|
FB1 | 22.5580 N° | 114.5733 E° | 13 | 2022/7/19-2023/5/21 | 杨梅坑近岸 |
FB2 | 22.5688 N° | 114.5179 E° | 7 | 2022/7/18-2022/12/6 | 大鹏澳中心 |
表2 FB1环境参数季节平均值及秩(Z)和检验结果Tab. 2 Seasonal average values of environmental parameters of FB1 |
季节 | 环境参数 | ||||
---|---|---|---|---|---|
温度/℃ | 盐度/‰ | DO/(mg·L−1) | pH | Chl a/(μg·L−1) | |
春季 | 21.16±2.18 | 33.35±1.28 | 6.95±0.74 | 8.18±0.20 | 0.79±0.36 |
夏季 | 28.51±2.48 | 31.72±2.82 | 7.61±0.86 | 8.32±0.16 | 2.31±1.52 |
秋季 | 20.41±2.63 | 32.17±0.81 | 7.19±0.67 | 8.31±0.10 | 1.33±1.15 |
冬季 | 16.82±0.59 | 32.93±0.06 | 8.75±1.14 | 8.39±0.10 | 1.03±0.45 |
Z | 3 | 3 | 3 | 3 | 3 |
P | <0.01 | <0.01 | <0.01 | <0.01 | <0.01 |
注:P< 0.01表示该参数在四季中存在极显著的统计学差异。 |
表3 R语言meta2d函数分析—校正后P值Tab. 3 R language meta2d function analysis - corrected P value |
站位 | 季节 | P | ||||
---|---|---|---|---|---|---|
Chl a | DO | 温度 | 盐度 | pH | ||
FB1 | 夏季 | 4.92×10−54 | 1 | 1 | 1 | 1 |
秋季 | 1.28×10−21 | 0.00048 | 0.02037 | 1 | 6.54×10−8 | |
冬季 | 2.86×10−11 | 1 | 1 | 1 | 1 | |
春季 | 4.92×10−54 | 1 | 1 | 1 | 1 | |
FB2 | 夏季 | 1.14×10−34 | 4.70×10−10 | 2.78×10−8 | 1 | 1 |
秋季 | 1.83×10−12 | 0.01946 | 0.00137 | 1 | 0.20238 |
注: P < 0.05则表示有显著的昼夜节律现象, P < 0.01则表示有极显著的昼夜节律现象。 |
表4 FB1和FB2环境参数夏、秋季平均值Tab. 4 Average values of environmental parameters of FB1 and FB2 in summer and autumn |
季节 | 环境参数 | ||||
---|---|---|---|---|---|
温度/℃ | 盐度/‰ | DO/(mg·L−1) | pH | Chl a/(μg·L−1) | |
FB1_夏季 | 28.51±2.48 | 31.72±2.82 | 7.61±0.86 | 8.32±0.16 | 2.31±1.52 |
FB1_秋季 | 20.41±2.63 | 32.17±0.81 | 7.19±0.67 | 8.31±0.10 | 1.33±1.15 |
FB2_夏季 | 29.21±2.87 | 29.08±3.21 | 7.26±0.97 | 8.24±0.12 | 4.00±2.85 |
FB2_秋季 | 25.02±0.52 | 31.80±0.87 | 6.52±0.76 | 8.29±0.05 | 4.45±1.97 |
注: 浮标2秋季数据为初秋, 故温度相对较高。 |
表5 夏、秋季FB1环境参数之间的相关性分析—P值Tab. 5 Correlation between environmental parameters of FB1 in summer and autumn - P value |
Chl a | DO | 温度 | 盐度 | pH | |
---|---|---|---|---|---|
Chl a | 1 | 0.338** | 0.404** | -0.460** | 0.263** |
DO | 1 | 0.367** | -0.075** | 0.278** | |
温度 | 1 | -0.272** | 0.292** | ||
盐度 | 1 | -0.584** | |||
pH | 1 |
注: **表示在0.01水平(双侧)上显著相关。 |
表6 夏、秋季FB2环境参数之间的相关性分析—P值Tab. 6 Correlation between environmental parameters of FB2 in summer and autumn - P value |
Chl a | DO | 温度 | 盐度 | pH | |
---|---|---|---|---|---|
Chl a | 1 | 0.392** | -0.187** | -0.348** | 0.195** |
DO | 1 | 0.320** | -0.261** | 0.258** | |
温度 | 1 | -0.241** | 0.334** | ||
盐度 | 1 | -0.170** | |||
pH | 1 |
注: **表示在0.01水平(双侧)上显著相关。 |
图3 台风期间FB2的环境参数变化蓝色、黄色虚线分布为深圳市气象局发布台风蓝色、黄色预警的时间, 黑色虚线为台风被中央气象台停止编号的时间 Fig. 3 Changes of environmental parameters of FB2 during typhoon blue and yellow dotted lines are the time when Meteorological Bureau of Shenzhen Municipality issued typhoon blue and yellow warning, and black dotted lines are the time when the typhoon was downgraded by the National Meteorological Center |
图4 台风期间FB1的环境参数变化(蓝色、黄色虚线分布为深圳市气象局发布台风蓝色、黄色预警的时间, 黑色虚线为台风被中央气象台停止编号的时间)Fig. 4 Changes of environmental parameters of FB1 during typhoon (blue and yellow dotted lines are the time when Meteorological Bureau of Shenzhen Municipality issued typhoon blue and yellow warning, and black dotted lines are the time when the typhoon was downgraded by the National Meteorological Center) |
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