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Unveiling the interaction mechanisms of key functional microorganisms in the partial denitrification-anammox process induced by COD

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 153-165页

作者： Guangjiao Chen Lan Lin Ying Wang Zikun Zhang wenzhi cao Yanlong Zhang Key Laboratory of Marine Environmental Science College of the Environment and EcologyXiamen UniversityXiamen 361102China Fujian Key Laboratory of Coastal Pollution Prevention and Control College of Environment and EcologyXiamen UniversityXiamen 361102China Department of Civil and Environmental Engineering Graduate School of EngineeringTohoku UniversitySendaiMiyagi 980-8579Japan

Partial denitrification-anammox(PD-anammox)is an innovative process to remove nitrate(NO_(3)^(–)–N)and ammonia(NH4+–N)simultaneously from *** operation of the PD-anammox process relies on the synergy and competition between anammox bacteria and ***,the mechanism of metabolic between the functional bacteria in the PD-anammox system remains unclear,especially in the treatment of high-strength *** kinetics of nitrite(NO_(2)^–N)accumulation during denitrification was investigated using the Michaelis-Menten equation,and it was found that low concentrations of NO_(3)^–N had a more significant effect on the accumulation of NO_(2)^–N during *** matter was a key factor to regulate the synergy of anammox and denitrification,and altered the nitrogen removal *** competition for NO_(2)^–N caused by high COD concentration was a crucial factor that affecting the system *** sequencing techniques demonstrated that excess organic matter promoted the relative abundance of the Denitratesoma genus and the nitrite reductase gene nirS,causing the denitrifying bacteria Denitratisoma to compete with Cadidatus Kuenenia for NO_(2)^–N,thereby affecting the stability of the *** carbon and nitrogen removal between partial denitrifiers and anammox bacteria can be effectively achieved by controlling the COD and COD/NO_(3)^(–)N.

关键词： PD-anammox process Nitrite accumulation COD Microbial interaction

Developing nutrient criteria for the Jiulong River Estuary,Southeast China

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Acta Oceanologica Sinica 2018年第2期37卷 1-13页

作者： LIU Baoli cao wenzhi HUANG Zheng CHEN Wenhui CHEN Huihuang LIU Lusan State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361102 China College of the Environment and Ecology Xiamen University Xiamen 361102 China College of Geographical Sciences Fujian Normal University Fuzhou 350007 China Chinese Research Academy of Environmental Sciences Beijing 100012 China

One of the key concerns in estuarine and coastal environments is eutrophication, which is known to be closely connected to nutrient enrichment. To control and improve surface water quality, nutrient criteria are recommended in order to provide reference conditions for the environment. However, the current datasets of nutrient criteria in China are either designed for surface water or sea water, and as such these are not suitable for assessing estuarine water quality, especially given the unique ecosystem and dynamic properties of estuaries. To address this issue in current estuarine water management, nutrient criteria have been developed for a local estuary in the southeast of China. Segmentation of the Jiulong River Estuary, China was firstly analysed through field investigations carried out during 2013–2014, which resulted in the delineation of three segments characterized by their distinct properties in relation to salinity, hydrology, ecosystems, etc. Historical records from 1997 to 2014 were then analysed using statistical modelling to develop candidate nutrient criteria for the *** stage of the analysis was undertaken in combination with the study of nutrient status records from the 1980s,which were used to establish a baseline reference condition. The recommended criteria values of dissolved inorganic nitrogen（DIN） in Segments Ⅰ, Ⅱ and Ⅲ of the Jiulong River Estuary are 64, 21 and 14 μmol/L,respectively, and the corresponding values for soluble reactive phosphorus（SRP） are 0.89, 0.76 and 0.89 μmol/L,respectively. It should be emphasised that these values are site-dependent, and that different results may be achieved at other locations depending on the physical and biogeochemical characteristics of an estuary, or even a single site within a catchment. It is hoped that by demonstrating a possible methodological approach and methods of nutrient criteria derivation in the Jiulong River Estuary, the current study will offer researchers some fundamental ba

关键词： estuarine segmentation nutrient criteria ecosystems based approach

Soil organic carbon storages and bacterial communities along a restored mangrove soil chronosequence in the Jiulong River Estuary:From tidal flats to mangrove afforestation

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Fundamental Research 2023年第6期3卷 880-889页

作者： Feifei Wang Rui Guo Ning Zhang Shengchang Yang wenzhi cao State Key Laboratory of Marine Environmental Science Key Laboratory of the Ministry of Education for Coastal and Wetland EcosystemsCollege of Environment and EcologyXiamen UniversityXiamenFujian 361102China

Among many ecological services provided by mangrove ecosystems,soil organic carbon(SOC)storages have recently received much attention owing to the increasing atmospheric partial pressure of dissolved CO_(2)(pCO_(2)).Bacteria are fundamental to ecosystem functions and strongly influence the coupling of coastal carbon,nitrogen,and sulfur cycling in *** SOC storage and bacterial communities along a restored mangrove soil chronosequence in the Jiulong River Estuary were explored using the 16S rDNA sequencing *** results showed the SOC storage in the 100 cm soil profile was 103.31±5.87 kg C m^(−2)and 93.10±11.28 kg C m^(−2)for mangroves with afforestation ages of 36 and 60 years,*** total nitrogen(TN)and total sulfur(TS)contents exhibited significant correlations with the SOC in the mangrove soils,but only TN and SOC showed significant correlation in tidal flat *** the tidal flats and mangroves occupied the contiguous intertidal zone within several kilometers,the variations in the SOC storage along the restored mangrove soil chronosequence were notably *** Functional Annotation of Prokaryotic Taxa(FAPROTAX)database was used to annotate the metabolic functions of the bacteria in the *** annotation revealed that only four metabolic functions were enriched with a higher relative abundance of the corresponding bacteria,and these enriched functions were largely associated with sulfate *** addition,the specifically critical bacterial taxa that were associated with the SOC accumulation and nutrient cycling,shaped the distinct metabolic functions,and consequently facilitated the SOC accumulation in the mangrove soils with various afforestation *** general homogenization of the microbial community and composition along the intertidal soil chronosequence was primarily driven by the reciprocating tidal flows and geographical contiguity.

关键词： Soil organic carbon storage Bacterial communities Bacterial ecological functions Mangrove afforestation Tidal flats

Comparison of the Macrozoobenthic Community and Sedimentary Environment with and Without Horseshoe Crab Presence in the Crocodile Island Intertidal Zone,Xiamen,China

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Journal of Ocean University of China 2022年第3期21卷 573-582页

作者： CAI Lizhe ZHAO Xiaoyu PENG Wenqing LIN Jingxiang YANG Deyuan RAO Yiyong FU Sujing CHEN Xinwei cao wenzhi College of the Environment and Ecology Xiamen UniversityXiamen361102China Department of Environmental Science and Engineering Xiamen University Tan Kah Kee CollegeZhangzhou363105China Institute of Marine Biology Taiwan Ocean UniversityKeelung20224China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou510300China Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen361005China

In order to compare the macrozoobenthic community and sedimentary environment with and without the presence of horseshoe crabs,the benthic macrofauna,sediment grain size,chromium(Cr),cobalt(Co),nickel(Ni),polycyclic aromatic hydrocarbon(PAHs),organic carbon and nitrogen were seasonally investigated at site A(with horseshoe crab presence),sites B and C(without horseshoe crab presence)in the Crocodile Island intertidal zone in Xiamen from June 2018 to July *** results showed that most of the community parameters of benthic macrofauna,population parameters of common benthic macrofauna and environmental parameters were significantly different at the sites with horseshoe crab versus non-horseshoe crab sites.A two-way ANOVA test showed that the densities of Ceratonereis erythraeensis and Sigambra hanaokai had significant site *** and nonmetric multi-dimensional scaling(NMDS)analysis showed the community composition of benthic macrofauna was significantly different among the three sampling sites over four *** mean sand content at site A(64.32%)was higher than those at site B(36.01%)and site C(18.86%).Conversely,the mean contents of silt,clay,Cr,Co,Ni,organic carbon,organic nitrogen,phenanthrene,and pyrene at site A were lower than those at site B and site *** observations are consistent with the expected preferences of horseshoe crabs to live in areas with 60%sand content,which is associated with abundant and edible clamworms in the Crocodile Island intertidal zone,Xiamen.

关键词： benthic macrofauna Crocodile Island horseshoe crab sedimentary environment intertidal zone

LOC152742 as a biomarker in the diagnosis of pulmonary tuberculosis infection

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LOC152742 as a biomarker in the diagnosis of pulmonary tuber...

2019年中国肿瘤标志物学术大会暨第十三届肿瘤标志物青年科学家论坛

作者： Pan,Hongchao Chen,Zhong cao,wenzhi SimpleGene Clinical Labratory Limited

Objective Long intergenic noncoding RNAs (lncRNAs) are long noncoding transcripts from the intergenic regions of annotated protein-coding ***152742 as one of lncRNAs has been reported that was increased significantly ...

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The inflammatory response modulated by lincRNACox2 in macrophages infected by Mycobacterium tuberculosis

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The inflammatory response modulated by lincRNACox2 in macrop...

2019年中国肿瘤标志物学术大会暨第十三届肿瘤标志物青年科学家论坛

作者： Pan,Hongchao Chen,Zhong cao,wenzhi SimpleGene Clinical Labratory Limited

Objective Long intergenic non-coding RNAs (lincRNAs) are long non-coding transcripts (>200nt) from the intergenic regions of annotated protein-coding ***-Cox2 has been reported is an early-primary response gene contro...

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Long non-coding BDNF-ASRNA BDNF-AS acts as prognostic factor and functionally regulates cancer proliferation migration and cell cycle through CDC4 in colon cancer

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Long non-coding BDNF-ASRNA BDNF-AS acts as prognostic factor...

2019年中国肿瘤标志物学术大会暨第十三届肿瘤标志物青年科学家论坛

作者： Pan,Hongchao Chen,Zhong cao,wenzhi SimpleGene Clinical Labratory Limited

Objective Various long non-coding RNAs (lncRNAs) have been found to be aberrantly expressed in colon *** this study,we characterized the biomarker-like property and functional regulations of lncRNA BDNF-AS in human co...

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Curcumin b06 promotes the apoptosis of prostate cells by regulating androgen receptor

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Curcumin b06 promotes the apoptosis of prostate cells by reg...

2019年中国肿瘤标志物学术大会暨第十三届肿瘤标志物青...

作者： Pan,Hongchao Chen,Zhong cao,wenzhi SimpleGene Clinical Labratory Limited

＜正＞Objective Curcumin extracted from curcuma longa,is known to exhibit anti-inflammatory and anti-tumoral activities in various cancer *** studies indicated that curcumin may induce apoptosis of cancer cells;howeve...

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论虚假诉讼的刑事追诉程序之启动

法学杂志 2015年第6期36卷 113-120页

作者：曹文智北京师范大学刑事法律科学研究院北京100875

遏制虚假诉讼有两种方式,一种是民事纠错,另一种是刑事制裁。鉴于民事诉讼基本遵循辩论主义和当事人处分原则,民事诉讼的事实调查功能在发现虚假诉讼行为方面存在一些局限性。有效遏制虚假诉讼已成为当前刑事立法领域十分关注的问题。... 详细信息

遏制虚假诉讼有两种方式,一种是民事纠错,另一种是刑事制裁。鉴于民事诉讼基本遵循辩论主义和当事人处分原则,民事诉讼的事实调查功能在发现虚假诉讼行为方面存在一些局限性。有效遏制虚假诉讼已成为当前刑事立法领域十分关注的问题。无论虚假诉讼是否单独入罪,亦或者是利用现有刑事罪名对其予以打击,在虚假诉讼的刑事追诉程序启动上都存在诸多需要深入思考的问题。鉴于虚假诉讼的特殊性,应当明确由检察机关行使对虚假诉讼的刑事追诉权。在刑事追诉程序启动时,需要处理好刑事追诉与民事裁判、调解之间的冲突。

关键词：虚假诉讼刑事追诉刑民交叉