2010～2011年深圳湾Chl a与粒级结构的季节变化  

Seasonal changes of Chlorophyll a and size structure in Shengzhen bay from November 2010 to August 2011

作　　者：袁超[1,2] 徐宗军[2] 张学雷[2] 王宗灵[2] 

机构地区：[1]环境科学与工程学院中国海洋大学,山东青岛266100 [2]海洋生态环境科学与工程国家海洋局重点实验室国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋环境科学》2016年第6期888-893,共6页Marine Environmental Science

基　　金：海洋公益性行业科研专项经费项目(201005007)

摘　　要：于2010年11月至2011年8月对深圳湾的Chl a总量及粒级结构的时空分布进行了4个季度的调查,并分析了它们与环境因子的关系。结果表明：深圳湾Chl a总量年平均值为10.95 mg/m3,变化范围为0.63 mg/m3~186.99 mg/m3,季节变化表现为秋季（25.45 mg/m3）〉夏季（11.18 mg/m3）〉春季（4.95mg/m3）〉冬季（2.21 mg/m3）。全年Chl a空间分布均呈现出由湾内向湾外逐渐递减的趋势。春季和夏季深圳湾以微型浮游植物对Chl a总量的贡献占绝对优势（〉76%）;秋冬两季微型和小型浮游植物对Chl a总量贡献均占有很大的比重（〉84%）;微微型浮游植物对Chl a总量的贡献全年都很低（〈16%）。相关分析结果表明Chl a总量和Micro-Chl a与DIN呈显著正相关（p〈0.05）;Nano-Chl a与DIN、DIP和硅酸盐均呈显著正相关（p〈0.05）。深圳湾高Chl a总量,以小型和微型浮游植物占优势的粒级结构主要是由高营养盐水平引起的;在春季和冬季,光照和温度对粒级结构的形成也起到一定的作用。Total chlorophyll a and size structure of phytoplankton community were investigated in Shenzhen bay,a highly eutrophic bay in the southern China.From November 2010 to August 2011,total chlorophyll a was high with an annual mean of 10.95 mg/m3 and a range from 0.63 mg/m3 to 186.99 mg/m3.The highest concentration of total chlorophyll a was found in autumn（ 25.45 mg/m3）,followed by summer（ 11.18 mg/m3）,spring（ 4.95 mg/m3） and winter（ 2.21 mg/m3）.In all the four seasons,the concentration of chlorophyll a showed a similar spatial pattern,higher in coastal areas and lower in open areas.Phytoplankton was dominated by nano-sized species in spring and summer（ 〉 74%） and by micro-and nano-sized species（ 〉 84%） in autumn and winter.Pico-phytoplankton had very low contribution to total chlorophyll a all year around（ 〈 16%）.By Pearson’s Correlation analysis,micro-chlorophyll a had a significant positive correlation with dissolved inorganic nitrogen（ p 〈 0.05）; and nano-fraction had a significant positive correlation with dissolved inorganic nitrogen,dissolved inorganic phosphorus,and silicate（ p 〈0.05）.These results suggested that the high concentration of total chlorophyll a and the dominance of micro-and nanophytoplankton species was mainly due to high concentrations of nutrients.Light availability and temperature were also important in spring and winter.

关 键 词：深圳湾 CHL a 粒级结构 季节变化 

分 类 号：P734[天文地球—海洋化学]