Temporal dynamics of sediment bacterial communities in monospecific stands of Juncus maritimus and Spartina maritima

Plant Biology ◽  
2016 ◽  
Vol 18 (5) ◽  
pp. 824-834 ◽  
Author(s):  
D. F. R. Cleary ◽  
A. R. M. Polónia ◽  
A. I. Sousa ◽  
A. I. Lillebø ◽  
H. Queiroga ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Temporal Dynamics ◽  
Spartina Maritima ◽  
Juncus Maritimus ◽  
Sediment Bacterial Communities

scholarly journals Modeling the temporal dynamics of cervicovaginal microbiota identifies targets that may promote reproductive health

Microbiome ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Alexander Munoz ◽  
Matthew R. Hayward ◽  
Seth M. Bloom ◽  
Muntsa Rocafort ◽  
Sinaye Ngcapu ◽  
...  
Keyword(s):  
High Risk ◽  
Bacterial Communities ◽  
High Probability ◽  
Temporal Dynamics ◽  
Transition Probabilities ◽  
Low Risk ◽  
Sub Saharan Africa ◽  
Reproductive Outcomes ◽  
Bacterial Composition ◽  
Sub Saharan

Abstract Background Cervicovaginal bacterial communities composed of diverse anaerobes with low Lactobacillus abundance are associated with poor reproductive outcomes such as preterm birth, infertility, cervicitis, and risk of sexually transmitted infections (STIs), including human immunodeficiency virus (HIV). Women in sub-Saharan Africa have a higher prevalence of these high-risk bacterial communities when compared to Western populations. However, the transition of cervicovaginal communities between high- and low-risk community states over time is not well described in African populations. Results We profiled the bacterial composition of 316 cervicovaginal swabs collected at 3-month intervals from 88 healthy young Black South African women with a median follow-up of 9 months per participant and developed a Markov-based model of transition dynamics that accurately predicted bacterial composition within a broader cross-sectional cohort. We found that Lactobacillus iners-dominant, but not Lactobacillus crispatus-dominant, communities have a high probability of transitioning to high-risk states. Simulating clinical interventions by manipulating the underlying transition probabilities, our model predicts that the population prevalence of low-risk microbial communities could most effectively be increased by manipulating the movement between L. iners- and L. crispatus-dominant communities. Conclusions The Markov model we present here indicates that L. iners-dominant communities have a high probability of transitioning to higher-risk states. We additionally identify transitions to target to increase the prevalence of L. crispatus-dominant communities. These findings may help guide future intervention strategies targeted at reducing bacteria-associated adverse reproductive outcomes among women living in sub-Saharan Africa.

Sewer Sediment Bacterial Communities Suggest Potential to Transform Persistent Organic Pollutants

2018 ◽  
Vol 90 (12) ◽  
pp. 2022-2029 ◽  
Author(s):  
Valdis Krumins ◽  
Weimin Sun ◽  
Jia Guo ◽  
Staci Capozzi ◽  
Donna E. Fennell ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Bacterial Communities ◽  
Sediment Bacterial Communities

Temporal dynamics of bacterial communities in the water and sediments of sea cucumber (Apostichopus japonicus) culture ponds

Aquaculture ◽  
2020 ◽  
Vol 528 ◽  
pp. 735498
Author(s):  
Zelong Zhao ◽  
Jingwei Jiang ◽  
Yongjia Pan ◽  
Ying Dong ◽  
Zhong Chen ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Sea Cucumber ◽  
Temporal Dynamics ◽  
Apostichopus Japonicus

scholarly journals Short-term effect of simulated salt marsh restoration by sand-amendment on sediment bacterial communities

PLoS ONE ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. e0215767 ◽  
Author(s):  
François Thomas ◽  
James T. Morris ◽  
Cathleen Wigand ◽  
Stefan M. Sievert
Keyword(s):  
Salt Marsh ◽  
Bacterial Communities ◽  
Term Effect ◽  
Short Term ◽  
Salt Marsh Restoration ◽  
Marsh Restoration ◽  
Short Term Effect ◽  
Sediment Bacterial Communities

scholarly journals Increasing oxygen deficiency changes rare and moderately abundant bacterial communities in coastal soft sediments

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hanna Sinkko ◽  
Iina Hepolehto ◽  
Christina Lyra ◽  
Johanna M. Rinta-Kanto ◽  
Anna Villnäs ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Environmental Problem ◽  
Oxygen Deficiency ◽  
Marine Ecosystems ◽  
Operational Taxonomic Units ◽  
Water Oxygen ◽  
Abundant Otus ◽  
Compositional Changes ◽  
Induced Changes ◽  
Sediment Bacterial Communities

Abstract Coastal hypoxia is a major environmental problem worldwide. Hypoxia-induced changes in sediment bacterial communities harm marine ecosystems and alter biogeochemical cycles. Nevertheless, the resistance of sediment bacterial communities to hypoxic stress is unknown. We investigated changes in bacterial communities during hypoxic-anoxic disturbance by artificially inducing oxygen deficiency to the seafloor for 0, 3, 7, and 48 days, with subsequent molecular biological analyses. We further investigated relationships between bacterial communities, benthic macrofauna and nutrient effluxes across the sediment-water-interface during hypoxic-anoxic stress, considering differentially abundant operational taxonomic units (OTUs). The composition of the moderately abundant OTUs changed significantly after seven days of oxygen deficiency, while the abundant and rare OTUs first changed after 48 days. High bacterial diversity maintained the resistance of the communities during oxygen deficiency until it dropped after 48 days, likely due to anoxia-induced loss of macrofaunal diversity and bioturbation. Nutrient fluxes, especially ammonium, correlated positively with the moderate and rare OTUs, including potential sulfate reducers. Correlations may reflect bacteria-mediated nutrient effluxes that accelerate eutrophication. The study suggests that even slightly higher bottom-water oxygen concentrations, which could sustain macrofaunal bioturbation, enable bacterial communities to resist large compositional changes and decrease the harmful consequences of hypoxia in marine ecosystems.

scholarly journals Structure and temporal dynamics of the bacterial communities associated to microhabitats of the coralOculina patagonica

2016 ◽  
Vol 18 (12) ◽  
pp. 4564-4578 ◽  
Author(s):  
Esther Rubio-Portillo ◽  
Fernando Santos ◽  
Manuel Martínez-García ◽  
Asunción de los Ríos ◽  
Carmen Ascaso ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Temporal Dynamics
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