极地研究

极地研究 ›› 2019, Vol. 31 ›› Issue (1): 25-33.DOI: 10.13679/j.jdyj.20180012

• 研究论文 • 上一篇    下一篇

北极楚科奇海微微型真核浮游生物群落结构及其环境相关性分析

吴月1, 2  曹叔楠2  何剑锋2  何培民1  罗光富2  蓝木盛2   

  1. 1上海海洋大学海洋生态与环境学院, 上海 201306;
    2国家海洋局极地科学重点实验室, 中国极地研究中心, 上海 201306
  • 收稿日期:2018-03-16 修回日期:2018-04-09 出版日期:2019-03-30 发布日期:2019-03-30
  • 通讯作者: 何剑锋
  • 基金资助:

    国家自然科学基金(41476168)和南北极环境综合考察与评估专项(CHINARE2011-2017)资助

 
Community structure of picoeukaryotes in the Chukchi Sea and their relationship with environmental factors

Wu Yue1,2, Cao Shunan2, He Jianfeng2, He Peimin1, Luo Guangfu2, Lan Musheng2   

  • Received:2018-03-16 Revised:2018-04-09 Online:2019-03-30 Published:2019-03-30
  • Supported by:

    ;National Natural Science Foundation of China

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摘要：

依托2012年夏季中国第5次北极科学考察, 对楚科奇海微微型真核浮游生物群落结构及其环境因子相关性进行了分析。结果显示, 在纲水平上, 该海域的优势类群包括青绿藻clade II(37.5%)、金藻纲(36.4%)、沟鞭藻纲(8.9%)、银耳纲(7.1%)、中鼓藻纲(2.4%)和旋毛纲(1.1%); 其中微微型真核浮游植物占微微型真核浮游生物的85.2%, 显示该群落处于快速生长期。与环境的相关性分析表明, 环境因子对微微型真核浮游植物的群落结构有着重要影响。中鼓藻纲与硝酸盐呈极显著正相关(P<0.01), 与盐度和亚硝酸盐呈显著正相关(P<0.05); 青绿藻clade II则与硝酸盐呈显著负相关(P<0.05)。这表明, 北冰洋的氮限制和海冰快速融化等过程均会影响其中的微微型真核浮游生物群落结构和空间分布, 有待未来进一步关注。

关键词: 微微型真核浮游植物, 微微型真核浮游动物, 真菌, 相关性分析, 楚科奇海

Abstract:

Field measurements and samplings were conducted during the 5th Chinese National Arctic Research Expedition in Summer 2012. Pyrosequencing was used to study the picoeukaryote community structure and correlation analysis was conducted to reveal the relationship between picoeukaryotes and environmental factors in the Chukchi Sea. The results show that Mamiellophyceae (37.5%), Chrysophyceae (36.4%), Dinophyceae (8.9%), Tremellomycetes (7.1%), Mediophyceae (2.4%), and Spirotrichea (1.1%) are the dominant groups at the class level. Picophytoplankton accounted for 85.2% of the picoeukaryotes in the Chukchi Sea, which indicates that the community was at the stage of rapid growth. Spearman analysis shows that environmental factors play an important role in the community structure of picophytoplankton. Mediophyceae had a very significant positive correlation with NO3– (P < 0.01) and a significant positive correlation with salinity and NO2– (P < 0.05). NO3– had a significant negative influence on Mamiellophyceae (P < 0.05). The results suggest that the nitrogen limitation of the Arctic Ocean and the rapidly melting sea ice affect the structure and spatial distribution of picoeukaryotes and that further attention is needed in the future.

Key words: picophytoplankton, picozooplankton, fungi, Spearman correlation analysis, Chukchi Sea