潘志伟,张潮,高会旺

• 1:中国海洋大学环境科学与工程学院
• 2:中国海洋大学海洋环境与生态教育部重点实验室

摘要(Abstract)：

本研究于2020年夏、秋两季，在黄海的三个站位开展了船基受控培养实验，研究了灰霾颗粒添加和光照变化(相较于海面约40%、68%和82%的光衰减)对微微型浮游植物生长、群落演替及碳生物量和叶绿素a(Chl a)比值的影响。结果表明，微微型浮游植物均表现出对总Chl a相当甚至主导的贡献能力，且所有培养站位初始海水中微微型浮游植物优势类群均为微微型真核浮游植物和聚球藻。在黄海中部和北部的贫营养海域，灰霾颗粒添加提供的氮能够促进微微型浮游植物的Chl a(Chl a_(pico))浓度、微微型真核浮游植物和聚球藻细胞丰度的增加，但光照变化的影响不显著。然而，微微型浮游植物碳生物量(C_(pico))和Chl a_(pico)比值(C_(pico)/Chl a_(pico))随着灰霾颗粒的添加和光照强度的衰减呈降低趋势，这与浮游植物的光合色素合成水平密切相关。在近岸富营养海域，培养实验期间海面的光照强度较低，且由于海域水体浑浊，光照强度是影响微微型浮游植物生长和C_(pico)/Chl a_(pico)比值的主要因素。Chl a_(pico)、细胞丰度和C_(pico)/Chl a_(pico)比值均随着光照强度的衰减逐渐降低。本研究初步揭示了大气沉降和光照双因子调控下微微型浮游植物Chl a_(pico)和碳生物量的变化特征。

关键词(KeyWords)： 微微型浮游植物;光照;灰霾颗粒;黄海;叶绿素a

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41876125,U1906215)资助~~

作者(Author): 潘志伟,张潮,高会旺

DOI: 10.16441/j.cnki.hdxb.20220233

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