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›› 2020, Vol. 42 ›› Issue (4): 314-323.

• 论文与报告 • 上一篇    下一篇

2008—2017年夏季闽东沿岸海域网采浮游植物群落年际变化特征研究

潘非斐   

  1. 福建省渔业资源监测中心
  • 收稿日期:2020-01-19 修回日期:2020-02-26 出版日期:2020-08-25 发布日期:2020-08-18
  • 通讯作者: 潘非斐
  • 基金资助:
    国家重点研发计划项目

Yearly changes of net-phytoplankton community in the coastal waters of Mindong in summer from 2008 to 2017

Fei-Fei Pan   

  • Received:2020-01-19 Revised:2020-02-26 Online:2020-08-25 Published:2020-08-18
  • Contact: Fei-Fei Pan

摘要: 根据2008—2017年夏季闽东沿岸海域浮游植物网采数据,对该海域近10年浮游植物群落特征年际变化进行了分析探讨。结果表明:近10年共鉴定4门8属263种浮游植物,硅藻为第一大类群,甲藻次之,赤潮种类占鉴定种类的31.56%,存在赤潮发生的潜在风险,生态类群以广温性种类为主。物种数的年际特征有着较大的变化,2017年种类数最高,2012年最低。浮游植物细胞丰度变化范围为(267.03~44 379.31)×104 ind/m3,硅藻细胞丰度大小决定了浮游植物群落细胞丰度大小。细胞丰度除2008年外,其余年份呈双峰型变化趋势,2008年细胞丰度最高,2013年最低。浮游植物细胞丰度的平面分布常年保持湾外高于湾内、北部高于南部、近岸高于远岸的特征。调查海域常见优势种为中肋骨条藻(Skeletonema costatum)、旋链角毛藻(Chaetoceros curvisetus)和柔弱伪菱形藻(Pseudo-nitzschia delicatissima)。浮游植物群落多样性水平变化幅度较大,表现为先升后急剧下降、再上升的特征,常年以来调查海域浮游植物群落整体多样性处于较低水平。调查海域优势种的异常增殖导致了浮游群落多样性水平偏低、种间比例不均匀、优势种单一,同时群落出现小型化现象,反之可看出闽东沿岸海域受到了一定程度的环境污染。

关键词: 闽东沿岸, 网采浮游植物, 群落变化, 年际变化, Mindong coastal waters, net-phytoplankton, community dynamics, yearly changes.

Abstract: Based on the net-phytoplankton data collected from Mindong coastal waters in summer from 2008 to 2017, a total of 4 phyla, 8 category, including 263 species of phytoplankton were identified in recent 10 years, in which diatoms and dinoflagellates were the most dominant species, and 31.56% were red-tide species with potential risk,and the main principal phytoplankton ecotypes were eurythermy species. Interannual variability of species had great change, with the highest in 2017, and the lowest in 2012. The species cell abundances varied from 267.03×104 to 44 379.31×104ind/m3, while cell abundance of phytoplankton community depended on the cell abundance of diatom. Except 2008, the interannual variability of cell abundance showed bimodal type trend, with the highest in 2008, and the lowest in 2013. The distribution of phytoplankton abundance kept a trend of higher outside bay and lower inside bay, higher in the north coast and lower in the south coast, higher inshore and lower offshore. Skeletonema costatum, Chaetoceros curvisetus and Pseudo-nitzschia delicatissima were the common dominant species. The interannual variability of community diversity had great changes, with a sharp decline after the first rise, and then rise. The diversity level was low during the survey. The multiplaction of phytoplankton led to the low diversity level of phytoplankton, species inbalance, monotony of community, and appeared miniaturization phenomenon. Instead it showed that Mindong caostal waters was polluted by human disturbance.