Seasonal dynamics of the bacterioplankton community in a large, shallow, highly dynamic freshwater lake
| Autor: | Haotian Yu, Wenbo Kou, Yantian Ma, Lan Wu, Zhaoyu Kong, Gang Ge |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Aquatic Organisms Burkholderia Nitrogen 030106 microbiology Immunology Fresh Water Applied Microbiology and Biotechnology Microbiology 03 medical and health sciences RNA Ribosomal 16S Actinomycetales Genetics Molecular Biology Ecosystem Ecology Aquatic ecosystem Phosphorus General Medicine Bacterioplankton Biodiversity Water level Lakes RNA Bacterial Phytoplankton Environmental science Seasons Water Microbiology |
| Zdroj: | Canadian journal of microbiology. 64(11) |
| ISSN: | 1480-3275 |
| Popis: | The spatiotemporal shifts of the bacterioplankton community can mirror their transition of functional traits in an aquatic ecosystem. However, the spatiotemporal variation of the bacterioplankton community composition structure (BCCS) within a large, shallow, highly dynamic freshwater lake is still poorly understood. Here, we examined the seasonal and spatial variability of the BCCs within Poyang Lake by sequencing the 16S rRNA gene amplicon to explore how hydrological changes affect the BCCs. Principal coordinate analysis showed that the BCCs varied significantly among four sampling seasons, but not spatially. The seasonal changes of the BCCs were mainly attributed to the differences between autumn and spring–winter. Higher α diversity indices were observed in autumn. Redundancy analysis indicated that the BCCs co-variated with water level, pH, temperature, total phosphorus, ammoniacal nitrogen, electrical conductivity, total nitrogen, and turbidity. Among them, water level was the key determinant separating autumn BCCs from the BCCs in other seasons. A significantly lower relative abundance of Burkholderiales (betI and betVII) and a higher relative abundance of Actinomycetales (acI, acTH1, and acTH2) were found in autumn than in other seasons. Overall, our results suggest that water level changes associated with pH, temperature, and nutrient status shaped the seasonal patterns of the BCCs within Poyang Lake. |
| Databáze: | OpenAIRE |
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