Denitrification in urban river sediment and the contribution to total nitrogen reduction
Streams and rivers, especially in urban areas, are substantial sinks of bioavailable nitrogen owing to their hydrological connections with terrestrial systems and the intensity of inputs mediated by human activities. Denitrification can account for nitrogen removal in rivers, but its importance in u...
Guardado en:
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Elsevier
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/598f86a24a4a49b18d0f81c946852f88 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:598f86a24a4a49b18d0f81c946852f88 |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:598f86a24a4a49b18d0f81c946852f882021-12-01T04:30:49ZDenitrification in urban river sediment and the contribution to total nitrogen reduction1470-160X10.1016/j.ecolind.2020.106960https://doaj.org/article/598f86a24a4a49b18d0f81c946852f882021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308992https://doaj.org/toc/1470-160XStreams and rivers, especially in urban areas, are substantial sinks of bioavailable nitrogen owing to their hydrological connections with terrestrial systems and the intensity of inputs mediated by human activities. Denitrification can account for nitrogen removal in rivers, but its importance in urban rivers has been scarcely studied. This study chose 8 representative rivers in Shanghai, under different level of urbanization, and measured denitrification rates of sediments across a year. The results showed significant differences in temporal, spatial and vertical distributions (p < 0.05). Seasonally, the denitrification rate in spring and winter were lower than in autumn. Spatially, the higher denitrification rate of rivers in residential and industrial areas than that in suburban rivers, which dominated with cultivated land, was weakly related to dissolved oxygen (DO) (p < 0.05, r = −0.380) and ammonium nitrogen (NH4+-N) concentration (p < 0.05, r = 0.303) in the water column. Vertically, the surface layer (0–2 cm) accounted for 78.2% of the total denitrification capacity (0–5 cm). The denitrification rates among different depths positively correlated with the extractable nitrate concentration (SNO3−-N), the extractable ammonium nitrogen concentration (SNH4+-N), the organic carbon concentration (SOC), water content and pH of sediment to varying degrees. In addition, the mean annual denitrification rate of studied rivers was calculated as 2.62 ± 0.420 mg N m−2 h−1, and denitrification contributed nearly 20% of the nitrogen removal, these results underscore the importance of denitrification in nitrogen reduction of urban rivers.Dong YangDongqi WangShu ChenYan DingYingyuan GaoHaowen TianRui CaiLin YuHuanguang DengZhenlou ChenElsevierarticleUrbanizationRiverSediment denitrificationTemporal and spatial variationEffect factorsNitrogen removalEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106960- (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Urbanization River Sediment denitrification Temporal and spatial variation Effect factors Nitrogen removal Ecology QH540-549.5 |
| spellingShingle |
Urbanization River Sediment denitrification Temporal and spatial variation Effect factors Nitrogen removal Ecology QH540-549.5 Dong Yang Dongqi Wang Shu Chen Yan Ding Yingyuan Gao Haowen Tian Rui Cai Lin Yu Huanguang Deng Zhenlou Chen Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| description |
Streams and rivers, especially in urban areas, are substantial sinks of bioavailable nitrogen owing to their hydrological connections with terrestrial systems and the intensity of inputs mediated by human activities. Denitrification can account for nitrogen removal in rivers, but its importance in urban rivers has been scarcely studied. This study chose 8 representative rivers in Shanghai, under different level of urbanization, and measured denitrification rates of sediments across a year. The results showed significant differences in temporal, spatial and vertical distributions (p < 0.05). Seasonally, the denitrification rate in spring and winter were lower than in autumn. Spatially, the higher denitrification rate of rivers in residential and industrial areas than that in suburban rivers, which dominated with cultivated land, was weakly related to dissolved oxygen (DO) (p < 0.05, r = −0.380) and ammonium nitrogen (NH4+-N) concentration (p < 0.05, r = 0.303) in the water column. Vertically, the surface layer (0–2 cm) accounted for 78.2% of the total denitrification capacity (0–5 cm). The denitrification rates among different depths positively correlated with the extractable nitrate concentration (SNO3−-N), the extractable ammonium nitrogen concentration (SNH4+-N), the organic carbon concentration (SOC), water content and pH of sediment to varying degrees. In addition, the mean annual denitrification rate of studied rivers was calculated as 2.62 ± 0.420 mg N m−2 h−1, and denitrification contributed nearly 20% of the nitrogen removal, these results underscore the importance of denitrification in nitrogen reduction of urban rivers. |
| format |
article |
| author |
Dong Yang Dongqi Wang Shu Chen Yan Ding Yingyuan Gao Haowen Tian Rui Cai Lin Yu Huanguang Deng Zhenlou Chen |
| author_facet |
Dong Yang Dongqi Wang Shu Chen Yan Ding Yingyuan Gao Haowen Tian Rui Cai Lin Yu Huanguang Deng Zhenlou Chen |
| author_sort |
Dong Yang |
| title |
Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| title_short |
Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| title_full |
Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| title_fullStr |
Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| title_full_unstemmed |
Denitrification in urban river sediment and the contribution to total nitrogen reduction |
| title_sort |
denitrification in urban river sediment and the contribution to total nitrogen reduction |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/598f86a24a4a49b18d0f81c946852f88 |
| work_keys_str_mv |
AT dongyang denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT dongqiwang denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT shuchen denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT yanding denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT yingyuangao denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT haowentian denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT ruicai denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT linyu denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT huanguangdeng denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction AT zhenlouchen denitrificationinurbanriversedimentandthecontributiontototalnitrogenreduction |
| _version_ |
1718405843468156928 |