Temperature mainly determines the temporal succession of the photosynthetic picoeukaryote community in Lake Chaohu, a highly eutrophic shallow lake

文献类型： 外文期刊

第一作者： Shi, Xiaoli

作者： Shi, Xiaoli;Li, Shengnan;Zhang, Min;Liu, Changqing;Wu, Qinglong;Li, Shengnan;Liu, Changqing

作者机构：

关键词： Photosynthetic picoeukaryotes (PPEs); Temporal succession; Ecological network; Heterotrophic picoeukaryotes

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 702 卷

页码：

收录情况： SCI

摘要： Photosynthetic picoeukaryotes (PPEs) are key players in aquatic systems, while their diversity and community composition dynamics remain poorly understood. The monthly composition of PPEs in Lake Chaohu was investigated using a combination of flow cytometry sorting and high throughput sequencing. Results indicated that temperature is the most important factor shaping PPEs community structure. The PPEs community can be categorized into three groups that are dominant at different temperature ranges: high temperature (>21.8 degrees C), intermediate temperature (between 9.8 degrees C and 21.8 degrees C) and low temperature (<9.8 degrees C). At the supergroup level, Cryptophyta were dominant at the intermediate temperature level, and Bacillariophyta were prevalent at low temperatures. In comparison, Chlorophyta PPEs were sensitive to temperature at the order level. Molecular network analysis using 18S rDNA sequencing results from sorted samples revealed that the Operational Taxonomic Units (OTUs) of PPE from the same taxonomic groups were predominantly positive, implying that they were occupying similar niches. The cooccurrence patterns between PPEs and fungi were mostly negative. In particular, OTU101, which was associated with Chytridiomycota, was negatively related to many OTUs belonging to Chlorophyta and Diatom, indicating that their potential parasitic associations may be not species-specific. (C) 2019 Elsevier B.V. All rights reserved.

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