Linking microbial community structure to membrane biofouling associated with varying dissolved oxygen concentrations

2011 ◽  
Vol 102 (10) ◽  
pp. 5626-5633 ◽  
Author(s):  
Da-wen Gao ◽  
Yuan Fu ◽  
Yu Tao ◽  
Xin-xin Li ◽  
Min Xing ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Dissolved Oxygen ◽  
Microbial Community Structure ◽  
Membrane Biofouling ◽  
Oxygen Concentrations

Effects of dissolved oxygen on sludge reduction and microbial community structure in sequencing batch reactors

2019 ◽  
Vol 161 ◽  
pp. 56-65
Author(s):  
Yufeng Xu ◽  
Long Wang ◽  
Xiaofeng Yin ◽  
Shengkun Zhang ◽  
Simin Li ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Dissolved Oxygen ◽  
Microbial Community Structure ◽  
Batch Reactors ◽  
Sludge Reduction ◽  
Sequencing Batch Reactors

Microbial community structure of membrane fouling film in an intermittently and continuously aerated submerged membrane bioreactor treating domestic wastewater

2004 ◽  
Vol 49 (2) ◽  
pp. 255-261 ◽  
Author(s):  
B.-R. Lim ◽  
K.-H. Ahn ◽  
P. Songprasert ◽  
J.W. Cho ◽  
S.H. Lee
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Domestic Wastewater ◽  
Experimental Results ◽  
Submerged Membrane Bioreactor ◽  
Membrane Biofouling ◽  
Nocardia Sp

There was an observable difference in microbial community structure between suspended microorganisms and membrane biofouling film in intermittently and continuously aerated SMBRs. The dominant quinone type of membrane biofouling film in an intermittently aerated SMBR was ubiquinone (UQs)-8, -10 followed by menaquinone (MKs)-8(H4) and -8(H2). But that of the continuously aerated SMBR was UQs-10, -8 followed by MKs-6 and -8(H4). The experimental results also showed that the conditions of an intermittently aerated SMBR may contribute to biofouling by Pseudomonas, Moraxella, Vibrio (quinone type UQ-8), Staphylococcus warneri (quinone type MK-7), Micrococcus sp. (quinone type MK-8(H2)) and Nocardia sp. (quinone type MK-8(H4)), but biofouling in a continuously aerated SMBR may be due to Paracoccus sp. (quinone type: UQ-10) and Flavobacterium species (quinone type: MK-6). The microbial diversities in the intermittently aerated SMBR were 10.9 and 9.4 for biofouling film and suspended microorganisms, respectively. For the continuously aerated SMBR, the results were 10.4 and 10.5 for biofouling film and suspended microorganisms, respectively.

scholarly journals Extent of the annual Gulf of Mexico hypoxic zone influences microbial community structure

2018 ◽  
Author(s):  
Lauren Gillies Campbell ◽  
J. Cameron Thrash ◽  
Nancy N. Rabalais ◽  
Olivia U. Mason
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Gulf Of Mexico ◽  
Dissolved Oxygen ◽  
Microbial Community Structure ◽  
Rrna Gene ◽  
Hypoxic Zone ◽  
Low Do

AbstractRich geochemical datasets generated over the past 30 years have provided fine-scale resolution on the northern Gulf of Mexico (nGOM) coastal hypoxic (≤ 2 mg of O2 L-1) zone. In contrast, little is known about microbial community structure and activity in the hypoxic zone despite the implication that microbial respiration is responsible for forming low dissolved oxygen (DO) conditioXSns. Here, we hypothesized that the extent of the hypoxic zone is a driver in determining microbial community structure, and in particular, the abundance of ammonia-oxidizing archaea (AOA). Samples collected across the shelf for two consecutive hypoxic seasons in July 2013 and 2014 were analyzed using 16S rRNA gene sequencing, oligotyping, microbial co-occurrence analysis and quantification of thaumarchaeal 16S rRNA and archaeal ammonia-monooxygenase (amoA) genes. In 2014 Thaumarchaeota were enriched and inversely correlated with DO while Cyanobacteria, Acidimicrobiia and Proteobacteria where more abundant in oxic samples compared to hypoxic. Oligotyping analysis of Nitrosopumilus 16S rRNA gene sequences revealed that one oligotype was significantly inversely correlated with dissolved oxygen (DO) in both years and that low DO concentrations, and the high Thaumarchaeota abundances, influenced microbial co-occurrence patterns. Taken together, the data demonstrated that the extent of hypoxic conditions could potentially influence patterns in microbial community structure, with two years of data revealing that the annual nGOM hypoxic zone is emerging as a low DO adapted AOA hotspot.

Long-term effect of dissolved oxygen on partial nitrification performance and microbial community structure

2009 ◽  
Vol 100 (11) ◽  
pp. 2796-2802 ◽  
Author(s):  
Jianhua Guo ◽  
Yongzhen Peng ◽  
Shuying Wang ◽  
Yanan Zheng ◽  
Huijun Huang ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Dissolved Oxygen ◽  
Microbial Community Structure ◽  
Term Effect ◽  
Partial Nitrification ◽  
Long Term Effect

scholarly journals Effects of Seasonal Anoxia on the Microbial Community Structure in Demosponges in a Marine Lake in Lough Hyne, Ireland

mSphere ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Astrid Schuster ◽  
Brian W. Strehlow ◽  
Lisa Eckford-Soper ◽  
Rob McAllen ◽  
Donald E. Canfield
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Sponge Species ◽  
Molecular Evidence ◽  
Low Oxygen ◽  
Microbial Composition ◽  
Content Type ◽  
Oxygen Conditions ◽  
Oxygen Concentrations

ABSTRACT Climate change is expanding marine oxygen minimum zones (OMZs), while anthropogenic nutrient input depletes oxygen concentrations locally. The effects of deoxygenation on animals are generally detrimental; however, some sponges (Porifera) exhibit hypoxic and anoxic tolerance through currently unknown mechanisms. Sponges harbor highly specific microbiomes, which can include microbes with anaerobic capabilities. Sponge-microbe symbioses must also have persisted through multiple anoxic/hypoxic periods throughout Earth’s history. Since sponges lack key components of the hypoxia-inducible factor (HIF) pathway responsible for hypoxic responses in other animals, it was hypothesized that sponge tolerance to deoxygenation may be facilitated by its microbiome. To test this hypothesis, we determined the microbial composition of sponge species tolerating seasonal anoxia and hypoxia in situ in a semienclosed marine lake, using 16S rRNA amplicon sequencing. We discovered a high degree of cryptic diversity among sponge species tolerating seasonal deoxygenation, including at least nine encrusting species of the orders Axinellida and Poecilosclerida. Despite significant changes in microbial community structure in the water, sponge microbiomes were species specific and remarkably stable under varied oxygen conditions, which was further explored for Eurypon spp. 2 and Hymeraphia stellifera. However, some symbiont sharing occurred under anoxia. At least three symbiont combinations, all including large populations of Thaumarchaeota, corresponded with deoxygenation tolerance, and some combinations were shared between some distantly related hosts. We propose hypothetical host-symbiont interactions following deoxygenation that could confer deoxygenation tolerance. IMPORTANCE The oceans have an uncertain future due to anthropogenic stressors and an uncertain past that is becoming clearer with advances in biogeochemistry. Both past and future oceans were, or will be, deoxygenated in comparison to present conditions. Studying how sponges and their associated microbes tolerate deoxygenation provides insights into future marine ecosystems. Moreover, sponges form the earliest branch of the animal evolutionary tree, and they likely resemble some of the first animals. We determined the effects of variable environmental oxygen concentrations on the microbial communities of several demosponge species during seasonal anoxia in the field. Our results indicate that anoxic tolerance in some sponges may depend on their symbionts, but anoxic tolerance was not universal in sponges. Therefore, some sponge species could likely outcompete benthic organisms like corals in future, reduced-oxygen ecosystems. Our results support the molecular evidence that sponges and other animals have a Neoproterozoic origin and that animal evolution was not limited by low-oxygen conditions.

Effects of dissolved oxygen on performance and microbial community structure in a micro-aerobic hydrolysis sludge in situ reduction process

2016 ◽  
Vol 90 ◽  
pp. 369-377 ◽  
Author(s):  
Tianhao Niu ◽  
Zhen Zhou ◽  
Xuelian Shen ◽  
Weimin Qiao ◽  
Lu-Man Jiang ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Dissolved Oxygen ◽  
Microbial Community Structure ◽  
Reduction Process ◽  
In Situ Reduction

scholarly journals The effects of seasonal anoxia on the microbial community structure in demosponges in a marine lake (Lough Hyne, Ireland)

2020 ◽  
Author(s):  
Astrid Schuster ◽  
Brian William Strehlow ◽  
Lisa Eckford-Soper ◽  
Rob McAllen ◽  
Donald Eugene Canfield
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Sponge Species ◽  
Molecular Evidence ◽  
Low Oxygen ◽  
Microbial Composition ◽  
Animal Evolution ◽  
Oxygen Conditions ◽  
Oxygen Concentrations

AbstractClimate change is expanding marine oxygen minimum zones (OMZs), while anthropogenic nutrient input depletes oxygen concentrations locally. The effects of deoxygenation on animals are generally detrimental; however, some sponges (Porifera) exhibit hypoxic and anoxic tolerance through currently unknown mechanisms. Sponges harbor highly specific microbiomes, which can include microbes with anaerobic capabilities. Sponge-microbe symbioses must also have persisted through multiple anoxic/hypoxic periods throughout Earth history. Since sponges lack key components of the hypoxia-inducible factor (HIF) pathway responsible for hypoxic responses in other animals, it was hypothesized that sponge tolerance to deoxygenation may be facilitated by its microbiome. To test this hypothesis, we determined the microbial composition of sponge species tolerating seasonal anoxia and hypoxia in situ in a semi-enclosed marine lake, using 16S rRNA amplicon sequencing. We discovered a high degree of cryptic diversity among sponge species tolerating seasonal deoxygenation, including at least nine encrusting species of the orders Axinellida and Poecilosclerida. Despite significant changes in microbial community structure in the water, sponge microbiomes were species specific and remarkably stable under varied oxygen conditions, though some symbiont sharing occurred under anoxia. At least three symbiont combinations, all including large populations of Thaumarchaeota, corresponded with deoxygenation tolerance, and some combinations were shared between distantly related hosts. We propose hypothetical host-symbiont interactions following deoxygenation that could confer deoxygenation tolerance.ImportanceThe oceans have an uncertain future due to anthropogenic stressors and an uncertain past that is becoming clearer with advances in biogeochemistry. Both past and future oceans were, or will be, deoxygenated compared to present conditions. Studying how sponges and their associated microbes tolerate deoxygenation provides insights into future marine ecosystems. Moreover, sponges form the earliest branch of the animal evolutionary tree and they likely resemble some of the first animals. We determined the effects of variable environmental oxygen concentrations on the microbial communities of several demosponge species during seasonal anoxia in the field. Our results indicate that anoxic tolerance in some sponges may depend on their symbionts, but anoxic tolerance was not universal in sponges. Therefore, some sponge species could likely outcompete benthic organisms like corals in future, reduced-oxygen ecosystems. Our results support the molecular evidence that sponges and other animals have a Neoproterozoic origin, and that animal evolution was not limited by low-oxygen conditions.

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