2004-2015年夏季渤海湾生态监控区网采浮游植物变化研究

黄海燕; 杨翼; 杨璐; 左国成; 曾容

doi:10.3969/j.issn.0253-4193.2018.01.013

2004-2015年夏季渤海湾生态监控区网采浮游植物变化研究

doi: 10.3969/j.issn.0253-4193.2018.01.013

国家海洋信息中心, 天津 300171

基金项目: 国家重点研发计划"海洋环境安全保障"重点专项"海洋大数据分析预报技术研发"（2016YFC1401906）。

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- 收稿日期: 2017-03-29

Study on dynamics of net-phytoplankton in Bohai Bay ecological monitoring area in summer from 2004 to 2015

National Marine Data and Information Service, Tianjin 300171, China

摘要

摘要: 基于2004-2015年12年的夏季渤海湾生态监控区浮游植物网样数据，开展浮游植物群落及96种定种的多年变化研究。结果表明：12年共鉴定出5门120种，硅藻占绝对优势，甲藻次之，赤潮生物种类占定种的59%；各年份物种数变化范围为23~61种，年平均细胞丰度范围为（7~87 731）×10⁴个/m³，物种多样性指数范围为1.13~3.04，丰富度指数范围0.36~1.12，均匀度指数范围0.31~0.72；12年中生物种类数、细胞丰度总体呈上升趋势，多样性指数、丰富度指数在波动中呈上升趋势，均匀度指数呈略有下降趋势；样品中几乎每年都出现的物种有10种，只检出1年的物种有23种；站位检出率不小于50%的物种只有4种，小于0.01%的有57种；星脐圆筛藻（Coscinodiscus asteromphalus）、中肋骨条藻（Skeletonema costatum）、格氏圆筛藻（Coscinodiscus granii）、叉角藻（Ceratium furca）和旋链角毛藻（Chaetoceros curvisetus）为该区域的优势种；近5年细胞丰度水平普遍比2010年前高，格氏圆筛藻（C.granii）、中肋骨条藻（S.costatum）、夜光藻（Noctiluca scintillans）等10种常见种密度呈增长趋势，较常见种长菱形藻（Nitzschia longissima）、星脐圆筛藻（C.asteromphalus）和北方角毛藻（Chaetoceros borealis）多年呈下降趋势。本研究有助于掌握该区域浮游植物物种的本底情况及演变趋势。
- 渤海湾生态监控区 /
- 网采浮游植物 /
- 物种变化 /
- 群落变化
Abstract: Based on the net-phytoplankton data collected from Bohai Bay ecological monitoring area in the summer of 2004-2015, interannual variability in phytoplankton community and 96 species were studied. Results showed, a total of 5 phyla including 120 species of phytoplankton were identified in recent 12 years, in which diatoms and dinoflagellates are the most dominant groups and 59% are red-tide species. The species numbers of all the years varied from 23 to 61, and annual cell abundances from 7×10⁴ cells/m³ to 87 731×10⁴ cells/m³. The biodiversity indexes ranged from 1.13 to 3.04, richness indexes 0.36-1.12 and evenness indexes 0.31-0.72. During 12 years, the species numbers and cell abundances have displayed an increasing trend, while the biodiversity and richness increased with fluctuation, the evenness index showed a slight trend of declination. Around 10 species were identified every year, and 23 species were only observed once. For the occurrence rate, only 4 species occurred in more than 50% stations, and 57 species less than 0.01% stations. Coscinodiscus asteromphalus, Skeletonema costatum, Coscinodiscus granii, Ceratium furca and Chaetoceros curvisetus were dominant species. The cell abundances in recent 5 years were much higher than those before 2010. Specifically, 10 common species showed a blooming trend such as Coscinodiscus granii, Skeletonema costatum and Noctiluca scintillans. While sub-common species such as Nitzschia longissima, Coscinodiscus asteromphalus and Chaetoceros borealis decreased gradually. This study would be of great significance to understand current phytoplankton status and variation trends.
- Bohai Bay ecological monitoring area /
- net-phytoplankton /
- species dynamics /
- community dynamics

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