Seasonal Variations of Picoeukaryote Community Structure in Zhoushan Fishing Ground, East China Sea

Abstract

Picoeukaryotes (< 2–3 μm) are major oceanic primary producers and play a crucial role for the functioning of marine ecosystems. However, the community structure of such communities remains poorly understood, especially in the East China Sea (ECS). We investigated the seasonal variations of abundance and diversity of picoeukaryotes, and recorded environmental variables, along a transect in Zhoushan Fishing Ground. High-throughput sequencing was used for sequencing the V4–V5 variable region within the 18S rRNA gene to analyze genetic diversity and relative abundance of picoeukaryotes. A total of 40 phyla, 68 classes, 99 orders, 126 families, and 140 genera were observed. The estimated richness and diversity indices were both higher in each season. The composition and dominant picoeukaryotes changed significantly at the class level with the seasons alternating. Basidiomycota, Ciliophora, Ascomycota and Cryptomonadales were observed throughout the year. The Linear Discriminant Analysis (LDA) revealed the predominant discriminant taxa of four seasonal groups. Redundancy analysis (RDA) showed that NO ₂ ⁻ and salinity played very important roles to picoeukaryotes for all the spring samples and DS5 sample in winter, PO ₄ ³⁻ and pH affected mostly picoeukaryotes for winter samples and autumn samples.

Journal

Journal ID (publisher-id): JOUC

Title: Journal of Ocean University of China

Publisher: Science Press and Springer (China )

ISSN (Electronic): 1672-5182

Publication date (Electronic): 15 November 2020

Publication date (Print): 01 December 2020

Volume: 19

Issue: 6

Pages: 1471-1479

Affiliations

¹National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China

²Chinese Research Academy of Environmental Sciences, Institute of Water Environment Science, Beijing 100020, China

³Institute of Zoology, Chinese Academy of Sciences, Beijing 100000, China

Author notes

*Corresponding author: ZHAO Shujiang, Tel: [phone], E-mail: sjzhao@ 123456zjou.edu.cn

# The two authors contributed equally to this work.

Article

Publisher ID: s11802-020-4327-2

DOI: 10.1007/s11802-020-4327-2

Copyright statement: Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

License:

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Product

Self URI (journal-page): https://www.springer.com/journal/11802