罗先香,单宇,杨建强

• 1:中国海洋大学海洋环境与生态教育部重点实验室
• 2:国家海洋局北海分局

摘要(Abstract)：

根据2011—2014年5和8月黄河口及邻近海域浮游植物及水环境数据,探讨了研究海域浮游植物群落的空间分布特征及与水环境的关系。结果表明:调查期间共发现浮游植物108种,隶属于3门46属,其中硅藻门85种,占物种总数的78.7%,甲藻门22种,占20.4%,金藻门1种,占0.9%。5月的浮游植物细胞丰度(2.29×107个/m3)远小于8月(6.83×108个/m3),5和8月浮游植物Shannon-Winner多样性指数(H’)平均值分别为1.79和2.39。通过聚类分析将浮游植物群落和水环境划分为特征差异显著的两个区域(p<0.01):黄河口北部及东部离岸海域(Ⅰ组)和黄河口南部沿岸海域(Ⅱ组)。5月Ⅰ组温度(T)、pH、氮磷比(N:P)和化学耗氧量(COD)显著小于Ⅱ组(p<0.05),而水深(Depth)和溶解氧(DO)显著大于Ⅱ组(p<0.05),Ⅰ组优势种有斯氏根管藻、圆筛藻、具槽帕拉藻和印度翼根管藻,Ⅱ组优势种有斯氏根管藻和圆筛藻;8月Ⅰ组的水深、盐度(S)和透明度(SD)显著大于Ⅱ组(p<0.05),而无机氮(DIN)、COD和石油烃(TPH)显著小于Ⅱ组(p<0.05),Ⅰ组的优势种包括拟扭链角毛藻、佛氏海线藻、角毛藻和旋链角毛藻,Ⅱ组优势种包括柔弱角毛藻、中肋骨条藻、垂缘角毛藻、角毛藻、佛氏海线藻、拟扭链角毛藻和圆筛藻。调查海域水环境因子与优势种丰度的RDA结果表明,影响5月黄河口北部及东部离岸海域和南部沿岸海域浮游植物优势种空间分布差异的主要水环境因子为T、pH和COD,影响8月浮游植物优势种在2个区域分布差异的主要水环境因子有S和COD。

关键词(KeyWords)： 黄河口;浮游植物;水环境;RDA分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目(U1406404);; 国家海洋局海洋公益性行业科研专项(201405007);; 国家重点基础研究发展计划项目(2015CB453301)资助~~

作者(Author): 罗先香,单宇,杨建强

DOI: 10.16441/j.cnki.hdxb.20170066

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