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Bacteria associated with Ulva prolifera: a vital role in green tide formation and migration

机译：与ULVA增殖相关的细菌：绿色潮汐形成和迁移中的一个至关重要的作用

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摘要

Ulva prolifera green tide in the Yellow Sea of China is a typical cross-regional marine ecological disaster. We hypothesized that the complex interactions between U. prolifera and its associated bacterial communities possibly impact the formation and outbreak of green tide. To test this hypothesis, the U. prolifera-associated bacterial community changes in the entire migration area were investigated through field sampling and high-throughput sequencing. The results showed that (1) with the green tide migration, the richness and diversity increased for U. prolifera epiphytic bacterial communities, while they decreased for seawater bacterial communities in the phycosphere. (2) The richness, diversity, and community composition of U. prolifera-associated bacteria changed more dramatically in the 35.00 degrees N sea area. (3) Potential interactions between bacteria and U. prolifera existed during the entire long-distance migration of green tide, and six bacterial functional groups (BFGs) were defined. Growth-regulating BFG I and antibacterial and stress-resistance BFG II were the dominant communities in the early stage of the green tide migration, which have the role of regulating algal growth and synergistic protection. Heterotrophic BFG III and algicidal BFG IV were the dominant communities in the late stage of the green tide migration, and they were able to compete with algae for nutrients and inhibit algal growth. Nutritive BFG V and algae-derived nutritional type BFG VI symbiotically lived with algal host. Our study highlights the spatial and temporal complexity of U. prolifera-associated bacterial communities and provides valuable insights into the potential contribution of U. prolifera-associated bacterial communities to green tide outbreaks.
机译：中国黄海的Ulva ProLifera绿色潮是一个典型的跨区域海洋生态灾难。我们假设U.Vrofera与其相关的细菌社区之间的复杂相互作用可能会影响绿色潮汐的形成和爆发。为了测试这一假设，通过现场采样和高通量测序研究了整个迁移区域的增殖相关的细菌群体变化。结果表明，（1）随着绿色潮流的迁移，对植物层中的海水细菌社区的富含性果皮细菌社区增加了丰富性和多样性。 （2）U.Sproifera相关细菌的丰富性，多样性和群落组成在35.00度的海域中更大地变化。 （3）细菌与U.在绿色潮汐的整个长距离迁移期间存在的潜在相互作用，并定义了六种细菌官能团（BFG）。生长调节BFG I和抗菌和抗菌性BFG II是绿色潮流迁移早期阶段的主导社区，具有调节藻类生长和协同保护的作用。异养的BFG III和Algicidal BFG IV是绿潮迁移后期的主要社区，并且它们能够与藻类竞争营养，抑制藻类生长。营养BFG V和藻类衍生营养型BFG VI与藻类宿主共生寿命。我们的研究突出了U.Provifera相关的细菌群落的空间和时间复杂性，并提供了对绿潮爆发的潜在贡献的有价值的见解。

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  • 来源
    《Harmful Algae》 |2021年第8期|102104.1-102104.14|共14页
  • 作者

    Qu Tongfei; Hou Chengzong; Zhao Xinyu; Zhong Yi; Guan Chen; Lin Zhihao; Tang Xuexi; Wang Ying;

  • 作者单位

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China;

    Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266071 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China|Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266071 Peoples R China;

    Ocean Univ China Coll Marine Life Sci 5 Yushan Rd Qingdao 266003 Peoples R China|Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266071 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Ulva prolifera green tide; Bacterial functional group; Algae-bacteria interaction; Bacterial community structure; 16S rRNA;

    机译：ULVA增殖绿潮;细菌官能团;藻类互动;细菌群落结构;16S rRNA;

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