Background nutrients and bacterial community evolution determine 13C-17β-estradiol mineralization in lake sediment microcosms

2019 ◽  
Vol 651 ◽  
pp. 2304-2311 ◽  
Author(s):  
Huanjun Zhang ◽  
Lei Wang ◽  
Yi Li ◽  
Peifang Wang ◽  
Chao Wang
Keyword(s):  
Bacterial Community ◽  
Lake Sediment ◽  
Community Evolution ◽  
17Β Estradiol

Bacterial contribution to 17β-estradiol mineralization in lake sediment as revealed by 13C-DNA stable isotope probing

2021 ◽  
pp. 117505
Author(s):  
Huanjun Zhang ◽  
Yin Lu ◽  
Yi Li ◽  
Lei Wang ◽  
Wenlong Zhang ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Lake Sediment ◽  
Stable Isotope Probing ◽  
17Β Estradiol

scholarly journals Chitinase Genes in Lake Sediments of Ardley Island, Antarctica

2005 ◽  
Vol 71 (12) ◽  
pp. 7904-7909 ◽  
Author(s):  
Xiang Xiao ◽  
Xuebin Yin ◽  
Jian Lin ◽  
Liguang Sun ◽  
Ziyong You ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Lake Sediment ◽  
Sediment Core ◽  
Chitinase Gene ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Chitinolytic Bacteria ◽  
Organic Carbon Concentration ◽  
Gene Copies ◽  
Chitinase Genes

ABSTRACT A sediment core spanning approximately 1,600 years was collected from a lake on Ardley Island, Antarctica. The sediment core had been greatly influenced by penguin guano. Using molecular methods, the chitinolytic bacterial community along the sediment core was studied over its entire length. Primers targeting conserved sequences of the catalytic domains of family 18 subgroup A chitinases detected group A chitinases from a wide taxonomic range of bacteria. Using quantitative competitive PCR (QC-PCR), chitinase gene copies in each 1-cm section of the whole sediment column were quantified. QC-PCR determination of the chitinase gene copies indicated significant correlation with phosphorus and total organic carbon concentration, suggesting a historical connection between chitinase gene copies and the amount of penguin guano input into the lake sediment. Most of the chitinase genes cloned from the historic sediment core were novel. Analysis of the chitinase gene diversity in selected sediment layers and in the fresh penguin deposits indicated frequent shifts in the chitinolytic bacterial community over time. Sequence analysis of the 16S rRNA genes of chitinolytic bacteria isolated from the lake sediment revealed that the isolates belonged to Janthinobacterium species, Stenotrophomonas species of γ-Proteobacteria, Cytophaga species of the Cytophaga-Flexibacter-Bacteroides group, and Streptomyces and Norcardiopsis species of Actinobacteria. Chitinase gene fragments were cloned and sequenced from these cultivated chitinolytic bacteria. The phylogeny of the chitinase genes obtained from the isolates did not correspond well to that of the isolates, suggesting acquisition via horizontal gene transfer.

The metolachlor degradation kinetics and bacterial community evolution in the soil bioelectrochemical remediation

Chemosphere ◽  
2020 ◽  
Vol 248 ◽  
pp. 125915 ◽  
Author(s):  
Xiaojing Li ◽  
Yue Li ◽  
Xiaolin Zhang ◽  
Xiaodong Zhao ◽  
Xiaodong Chen ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Degradation Kinetics ◽  
Community Evolution

Bacterial community along a historic lake sediment core of Ardley Island, west Antarctica

Extremophiles ◽  
2006 ◽  
Vol 10 (5) ◽  
pp. 461-467 ◽  
Author(s):  
Shengkang Li ◽  
Xiang Xiao ◽  
Xuebin Yin ◽  
Fengping Wang
Keyword(s):  
Bacterial Community ◽  
Lake Sediment ◽  
Sediment Core ◽  
West Antarctica ◽  
Lake Sediment Core

The responses of bacterial community and N2O emission to nitrogen input in lake sediment: Estrogen as a co-pollutant

2019 ◽  
Vol 179 ◽  
pp. 108769 ◽  
Author(s):  
Yi Li ◽  
Yue Sun ◽  
Huanjun Zhang ◽  
Longfei Wang ◽  
Wenlong Zhang ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Lake Sediment ◽  
N2o Emission ◽  
Nitrogen Input
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