首页|基于空间自相关的杭州湾及其邻近海域叶绿素a分布特征及其影响因素研究

基于空间自相关的杭州湾及其邻近海域叶绿素a分布特征及其影响因素研究

Distribution characteristics of chlorophyll a and its influencing environmental factors in Hangzhou Bay and its adjacent areas based on spatial autocorrelation analysis

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  • NETL
  • NSTL
  • 万方数据
基于 2020年 4月、7月和 10月在杭州湾及其邻近海域的调查资料,本文分析了环境参数和叶绿素a(Chl a)的时空分布特征,并基于空间自相关分析探讨了Chl a的影响因素.结果表明:Chl a浓度为 0.20～41.34 μg/L,均值夏季＞春季＞秋季,空间分布自西向东逐渐递增.环境因子和 Chl a在121.4°E-122.2°E沿西南向东北走向的海域、其以西海域、其以东海域呈现不同的空间聚集性.西部海域浓度常年偏低主要受高悬浮物造成的光限制影响;东部海域浓度偏高主要是因为高透明度及充足的营养盐为浮游植物生长提供了适宜的环境,夏季浓度急剧升高是浮游植物爆发性增殖所致,秋季高值区显著缩小主要受磷限制影响;中部海域浓度波动较大是由于水团消长导致不同季节的光限制和营养盐供给状态不同.研究结果更加精细地揭示了环境因素对Chl a的影响,对深化了解调查海域Chl a时空分布形成机制及赤潮成因有重要价值.
Based on the survey data collected in the Hangzhou Bay and its adjacent areas in April,July and October 2020,this study analyzed the spatiotemporal distribution characteristics of environmental parameters and chlorophyll a(Chl a),and explored the influencing factors of Chl a using spatial autocorrelation analysis.The results showed that the concentration of Chl a ranged from 0.20 to 41.34 μg/L,with higher values observed during summer,followed by spring and autumn.The spatial distribution of Chl a gradually increased from west to east.Environmental factors and Chl a exhibited distinct spatial clustering patterns in the southwest-northeast direction,specifically from 121.4°E to 122.2°E,in the western and eastern regions,respectively.The low concentration of Chl a in the west region was primarily attributed to light limitation caused by the high suspended matter.Conversely,the higher concentration of Chl a in the east region was influenced by the higher transparency and sufficient nutrients,creating an optimal environment for phytoplankton growth.The sharp increase in Chl a concentration during summer was attributed to phytoplankton blooms,while the significant decrease during autumn was mainly influenced by phosphorus limitation.The fluctuation of Chl a concentration in the central region resulted from varying light limitation and nutrient supply due to changes in water masses throughout different seasons.This study provides a more refined understanding of the impact of environmental factors on Chl a and deepens the knowledge of the underlying mechanisms driving spatial and temporal distribution of Chl a,as well as the causes behind red tide occurrence in the surveyed areas.

chlorophyll aspatial autocorrelationHangzhou Bayspatiotemporal distributionsenvironmental factorscoastal waters

王智慧、黄备、魏娜、柴小平、贾海波、罗韩燕、王婕妤、胡序朋、庄彤晖

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浙江省海洋生态环境监测中心, 浙江 舟山 316021

叶绿素a 空间自相关 杭州湾 时空分布 环境影响 近岸海域

国家自然科学基金面上项目浙江省科技计划项目浙江省科技计划项目舟山市科技计划项目舟山市科技计划项目

521701852023C350492023C031202023C310522024C31053

2024

海洋环境科学
国家海洋局海洋环境保护研究所 国家海洋环境监测中心 中国海洋科学学会

海洋环境科学

CSTPCD北大核心
影响因子：0.66
ISSN：1007-6336
年,卷(期)：2024.43(3)
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