Effects of polybrominated diphenyl ethers and plant species on nitrification, denitrification and anammox in mangrove soils

Chen, Juan; Zhou, Hai Chao; Pan, Ying; Shyla, Farzana Shazia; Tam, N.F.Y.

doi:10.1016/j.scitotenv.2016.02.052

Cited by 42 publications

(7 citation statements)

References 45 publications

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“…This also indicates a faster resource recycle metabolism, since the energy for N 2 fixation is mainly derived from the decomposition of dead leaves and roots in mangrove sediments 36,37 . The massive input of nitrate/nitrite and the high levels of heavy metals in the CMS might contribute to the observed decrease in the ammonia oxidation encoding genes, as these types of contamination are known to have a negative effect on the activity and abundance of ammonia oxidizers 38,39 .…”

Section: Discussionmentioning

confidence: 99%

Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments

Zheng

Zhang

et al. 2019

Sci Rep

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Mangrove forests are widespread along the subtropical and tropical coasts. They provide a habitat for a wide variety of plants, animals and microorganisms, and act as a buffer zone between the ocean and land. Along with other coastal environments, mangrove ecosystems are under increasing pressure from human activities, such as excessive input of nutrients and toxic pollutants. Despite efforts to understand the diversity of microbes in mangrove sediments, their metabolic capability in pristine and contaminated mangrove sediments remains largely unknown. By using metagenomic approach, we investigated the metabolic capacity of microorganisms in contaminated (CMS) and pristine (PMS) mangrove sediments at subtropical and tropical coastal sites. When comparing the CMS with PMS, we found that the former had a reduced diazotroph abundance and nitrogen fixing capability, but an enhanced metabolism that is related to the generation of microbial greenhouse gases via increased methanogenesis and sulfate reduction. In addition, a high concentration of heavy metals (mainly Zn, Cd, and Pb) and abundance of metal/antibiotic resistance encoding genes were found in CMS. Together, these data provide evidence that contamination in mangrove sediment can markedly change microbial community and metabolism; however, no significant differences in gene distribution were found between the subtropical and tropical mangrove sediments. In summary, contamination in mangrove sediments might weaken the microbial metabolisms that enable the mangrove ecosystems to act as a buffer zone for terrestrial nutrients deposition, and induce bioremediation processes accompanied with an increase in greenhouse gas emission.

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Section: Discussionmentioning

confidence: 99%

Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments

Zheng

Zhang

et al. 2019

Sci Rep

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“…Nitrogen (N) availability is an important limiting factor for the growth, productivity and distribution of mangroves in intertidal regions [10]. In contrast to terrestrial ecosystems, nitrification and micro-formation of NO 3 − in the sediments of mangroves are greatly inhibited [11][12][13][14]. Consequently, most inorganic N in mangrove sediments exists in the NH 4 + form [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Salt on Root Aeration, Nitrification, and Nitrogen Uptake in Mangroves

Zhao

Wang

et al. 2019

Forests

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The potential effects of salt on the growth, root anatomy, radial oxygen loss (ROL), and nitrogen (N) dynamics in mangroves were investigated using the seedlings of Avicennia marina (Forsk.) Vierh. The results showed that a moderate salinity (200 mM NaCl) appeared to have little negative effect on the growth of A. marina. However, higher salt stresses (400 and 600 mM NaCl) significantly inhibited the biomass yield. Concentrations of N in the roots and leaves decreased sharply with increasing salinity. Nevertheless, the presence of salt directly altered root anatomy (e.g., reduced root porosity and promoted suberization within the exodermis and endodermis), leading to a significant reduction in ROL. The results further showed that reduced ROL induced by salt could restrain soil nitrification, resulting in less ammonia-oxidizing archaea and bacteria (AOA and AOB) gene copies and lower concentrations of NO3− in the soils. While increased root suberization induced by salt inhibited NH4+ and NO3− uptake and influx into the roots. In summary, this study indicated that inhibited root aeration may be a defense response to salt, however these root symptoms were not advantageous for rhizosphere nitrification and N uptake by A. marina.

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“…The effects of some HFRs (e.g., TBBPA, PBDEs, and DBDPE) on microbiomes are well documented − and can be categorized based on their effects on (i) the entire microbial community, where exposure to HFRs can alter microbial composition (usually decreasing microbial diversity) and interactions of the microbiome via environmental filtering; ,,− (ii) individual microbial cells, where the integrity and function of cell membrane can be compromised by accumulation of these lipophilic pollutants, which directly affects cell viability; ,,, (iii) enzymatic activity and, therefore, activity of metabolic pathways can be altered by HFRs. , The ultimate effects of HFRs and related transformation products depend on a combination of these effects. Because there are few studies investigating the direct effects of HFRs on biological wastewater treatment systems and sludge anaerobic digesters, this review discusses demonstrated and putative effects of HFRs on biological nitrogen removal (i.e., nitrification, denitrification, and anaerobic ammonia oxidation) and methanogenesis by integrating the available information from both biological treatment systems ,,,− and other environmental matrices. ,− …”

Section: Effects Of Hfrs On Biological Treatment Systemsmentioning

confidence: 99%

“…The major processes for nitrogen removal from municipal wastewater include nitrification-denitrification and anaerobic ammonia oxidation (anammox) initiated by distinct functional microorganisms. ,− Generally, HFRs and related transformation products can negatively impact nitrogen removal . Concentration dependent inhibitory effects of deca-BDE (1000–100 000 ng/g dry soil/sediment) on nitrification by ammonia oxidizing bacteria (AOB; that is, Nitrosospira, Nitrosomonas ) and archaea (AOA; that is, Nitrosopumilus , Nitrosophaera ) have been consistently reported in sediment and soil microbiomes. − Additionally, deca-BDE and copper exhibit synergic inhibition of nitrification, which is noteworthy as cocontamination of heavy metals and deca-BDE is common in wastewater. , Exposure to TCEP and TCPP were also shown to decrease ammonia removal in a constructed wetland treating wastewater . The observed inhibition of ammonia oxidation was explained by decreased abundance of AOA and AOB and functional genes ( amoA ) expressed by these populations. − Similarly, the anammox process was also inhibited in mangrove soil exposed to deca-BDE (2000–20 000 ng/g dry weight) .…”

Section: Effects Of Hfrs On Biological Treatment Systemsmentioning

confidence: 99%

Insights into the Occurrence, Fate, and Impacts of Halogenated Flame Retardants in Municipal Wastewater Treatment Plants

Zhao

et al. 2021

Environ. Sci. Technol.

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Halogenated flame retardants (HFRs) have been extensively used in various consumer products and many are classified as persistent organic pollutants due to their resistance to degradation, bioaccumulation potential and toxicity. HFRs have been widely detected in the municipal wastewater and wastewater treatment solids in wastewater treatment plants (WWTPs), the discharge and agricultural application of which represent a primary source of environmental HFRs contamination. This review seeks to provide a current overview on the occurrence, fate, and impacts of HFRs in WWTPs around the globe. We first summarize studies recording the occurrence of representative HFRs in wastewater and wastewater treatment solids, revealing temporal and geographical trends in HFRs distribution. Then, the efficiency and mechanism of HFRs removal by biosorption, which is known to be the primary process for HFRs removal from wastewater, during biological wastewater treatment processes, are discussed. Transformation of HFRs via abiotic and biotic processes in laboratory tests and full-scale WWTPs is reviewed with particular emphasis on the transformation pathways and functional microorganisms responsible for HFRs biotransformation. Finally, the potential impacts of HFRs on reactor performance (i.e., nitrogen removal and methanogenesis) and microbiome in bioreactors are discussed. This review aims to advance our understanding of the fate and impacts of HFRs in WWTPs and shed light on important questions warranting further investigation.

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Effects of polybrominated diphenyl ethers and plant species on nitrification, denitrification and anammox in mangrove soils

Cited by 42 publications

References 45 publications

Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments

Comparative metagenomics study reveals pollution induced changes of microbial genes in mangrove sediments

Effects of Salt on Root Aeration, Nitrification, and Nitrogen Uptake in Mangroves

Insights into the Occurrence, Fate, and Impacts of Halogenated Flame Retardants in Municipal Wastewater Treatment Plants

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