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The denitrifying functional bacteria community plays a crucial role in the degradation of nitrate pollution. However, the understanding of the relationships between its interspecies links and nitrate load is still limited. Groundwater resources in the vicinity of Lake Taihu serve as vital reserves, yet in some areas, nitrate load in groundwater exceeds health thresholds. This paper focused on 14 groundwater samples with varying nitrate concentrations from the Lake Taihu area. With microbial sequencing techniques, the diversity of bacterial communities in groundwater was explored, and the denitrifying functional bacteria community was identified. The response of interspecies links within the denitrifying functional bacteria community to nitrate load was investigated by co-occurrence network analysis. The results indicate: Significant differences were found in bacterial community composition between high and low nitrate samples; The α-diversity and β-diversity were highly influenced by nitrate load; Interspecies links within the denitrifying functional bacteria community in the high nitrate samples were denser than those in the low nitrate samples. This study demonstrates that nitrate load in groundwater significantly influences the interspecies links within the denitrifying functional bacteria community, providing new insights into the interplay between groundwater denitrifying functional bacteria community and nitrate load in the Lake Taihu area.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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