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Study on denitrification process of sediment in the Liaohe Estuary
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Hongxia Ming1, Quanrui Chen1, 3, Yinyin Shi1, 2, Jie Su1, Ying Yu2, Jingfeng Fan1, *
Haiyang Xuebao | 2020, 42(12) : 82 - 92
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Haiyang Xuebao | 2020, 42(12): 82-92
• Article •
Study on denitrification process of sediment in the Liaohe Estuary
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Hongxia Ming1, Quanrui Chen1, 3, Yinyin Shi1, 2, Jie Su1, Ying Yu2, Jingfeng Fan1, *
Affiliations
  • 1 State Environmental Protection Key Laboratory of Coastal Ecosystem, National Marine Environmental Monitoring Center, Dalian 116023, China
  • 2 College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
  • 3 College of Ocean and Earth, Xiamen University, Xiamen 361005, China
Published: 2020-12-25 doi: 10.3969/j.issn.0253-4193.2020.12.009
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In recent years, the water quality of the Liaohe Estuary has been declining, and a large input of nitrogen has increased the burden on the environment. The denitrification process releases nitrogen from sediments into the atmosphere in the form of N2O and N2, which reduces the nitrogen load in the estuarine ecosystem. In this study, quantitative PCR was used to determine the levels of four denitrification functional genes narG, nirK, norB and nosZ present in the surface sediments of the Liaohe Estuary. The narG gene, which dominates nitrate reduction, was found to be the most abundant. The nirK-type denitrification functional gene was sequenced by high-throughput sequencing. The results showed that the genus of denitrifying bacteria in the Liaohe Estuary was mainly Devosia, Phaeobacter, Alcaligenes, Pseudomonas. The abundance of denitrification function genes is mainly affected by sediment properties, except that norB gene is significantly related to many environmental factors. The community structure and diversity of nirK type denitrifying bacteria are mainly affected by salinity, pH, dissolved oxygen and ${\rm {NO}}_2^- $ contents. The effects of environmental factors on the abundance and community structure of denitrifying bacteria were studied. The results provided a theoretical basis for alleviating the fate of nitrogen elements in the eutrophication of Liaohe Estuary.

Liaohe Estuary  /  sediment  /  nirK  /  bacterial community structure  /  functional genes of denitrifying bacteria
Hongxia Ming, Quanrui Chen, Yinyin Shi, Jie Su, Ying Yu, Jingfeng Fan. Study on denitrification process of sediment in the Liaohe Estuary[J]. Haiyang Xuebao, 2020 , 42 (12) : 82 -92 . DOI: 10.3969/j.issn.0253-4193.2020.12.009
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Year 2020 volume 42 Issue 12
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Article Info
doi: 10.3969/j.issn.0253-4193.2020.12.009
  • Receive Date：2019-12-18
  • Online Date：2026-03-27
  • Published：2020-12-25
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History
  • Received：2019-12-18
  • Revised：2020-06-08
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Affiliations
    1 State Environmental Protection Key Laboratory of Coastal Ecosystem, National Marine Environmental Monitoring Center, Dalian 116023, China
    2 College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
    3 College of Ocean and Earth, Xiamen University, Xiamen 361005, China
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表12种不同金属材料的力学参数
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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