Spatiotemporal patterns and environmental drivers of total and active bacterial abundances in Lake Taihu, China
文献类型：期刊论文
| 作者 | Xie, Guijuan; Tang, Xiangming; Shao, Keqiang; Hu, Yang; Liu, Hao; Martin, Robbie M.; Gao, Guang |
| 刊名 | ECOLOGICAL INDICATORS
 |
| 出版日期 | 2020 |
| 卷号 | 114 |
| 英文摘要 | Bacteria are a key component in lake ecosystems, playing a crucial role in driving biogeochemical and energy fluxes. In lake biomonitoring, false alarms have often been triggered due to the presence of abundant dead or dormant bacterial cells. Thus, quantification of the metabolically active and dormant cells is required for effective biomonitoring. In this study, 120 sites were seasonally sampled in a large, shallow, eutrophic lake (Taihu, China) to quantify the total bacterial (TB) and active bacterial (AB) abundances and explore their spatiotemporal distribution. Generalized additive models (GAMS) were used to identify the major environmental drivers of TB and AB dynamics. TB ranged from 7.57 x 10(4) to 1.84 x 10(8) cells mL(-1), while AB ranged from 4.42 x 10(3) to 5.56 x 10(6) cells mL(-1). The proportion of AB was significantly higher in May (mean: 18.7%; cyanobacterial bloom thriving season) than in January or September (6.8% and 4.7%, respectively). GAMS indicated that dissolved oxygen, total dissolved nitrogen (TDN), total dissolved phosphorus and turbidity explained 47.8% of the TB variation, while TDN, dissolved organic carbon, water temperature and total phosphorus explained 72.7% of the AB variation. Our study showed that nutrients and physical factors are the major drivers of the TB and AB abundance variations in Lake Taihu. Bacterial responses to environmental variation were mostly nonlinear. The high proportion of AB variation (72.7%) explained by environmental parameters indicates that active bacteria are more sensitive to environmental changes and could be more effective bioindicators for long-term monitoring in shallow eutrophic lakes. |
| 源URL | [http://159.226.73.51/handle/332005/20029]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Xie, Guijuan,Tang, Xiangming,Shao, Keqiang,et al. Spatiotemporal patterns and environmental drivers of total and active bacterial abundances in Lake Taihu, China[J]. ECOLOGICAL INDICATORS,2020,114. |
| APA | Xie, Guijuan.,Tang, Xiangming.,Shao, Keqiang.,Hu, Yang.,Liu, Hao.,...&Gao, Guang.(2020).Spatiotemporal patterns and environmental drivers of total and active bacterial abundances in Lake Taihu, China.ECOLOGICAL INDICATORS,114. |
| MLA | Xie, Guijuan,et al."Spatiotemporal patterns and environmental drivers of total and active bacterial abundances in Lake Taihu, China".ECOLOGICAL INDICATORS 114(2020). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。