Geospatial distribution of viromes in tropical freshwater ecosystems

WATER RESEARCH

卷:137

Article

Gu, Xiaoqiong¹  Tay, Qi Xiang Martin²  Te, Shu Harn¹  Saeidi, Nazanin¹  Goh, Shin Giek¹  Kushmaro, Ariel³  Thompson, Janelle R.²  Gin, Karina Yew-Hoong¹ 

[1] Natl Univ Singapore, Dept Civil & Environm Engn, Engn Dr 1,T Lab Bldg,TL08-03, Singapore 117576, Singapore

[2] Singapore MIT Alliance Res & Technol, Singapore 138602, Singapore

[3] Nanyang Thchnol Univ, Sch Mat Sci & Engn, Singapore 637819, Singapore

关键词: Virome;    Land use;    Geospatial distribution;    Diversity;    Human-related viruses;    Freshwater ecosystems;   

DOI  :  10.1016/j.watres.2018.03.017

来源: Elsevier

【 摘 要 】

This study seeks to understand the general distribution of virome abundance and diversity in tropical freshwater ecosystems in Singapore and the geospatial distribution of the virome under different landuse patterns. Correlations between diversity, environmental parameters and land use patterns were analyzed and significant correlations were highlighted. Overall, the majority (65.5%) of the annotated virome belonged to bacteriophages. The percentage of Caudovirales was higher in reservoirs whereas the percentages of Dicistroviridae, Microviridae and Circoviridae were higher in tributaries. Reservoirs showed a higher Shannon-index virome diversity compared to upstream tributaries. Land use (urbanized, agriculture and parkland areas) influenced the characteristics of the virome distribution pattern. Dictstroviridae and Microviridae were enriched in urbanized tributaries while Mimiviridae, Phycodnaviridae, Siphoviridae and Podoviridae were enriched in parkland reservoirs. Several sequences closely related to the emerging zoonotic virus, cyclovirus, and the human-related virus (human picobirnavirus), were also detected. In addition, the relative abundance of PMMoV (pepper mild mottle virus) sequences was significantly correlated with RT-qPCR measurements (0.588 < r < 0.879, p < 0.05). This study shows that spatial factors (e.g., reservoirs/tributaries, land use) are the main drivers of the viral community structure in tropical freshwater ecosystems. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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