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

A 450-year warming and wetting climate in southern Altay inferred from a Yileimu Lake sediment core

2021 ◽  
Author(s):  
Jiawei Fan ◽  
Hanchao Jiang ◽  
Wei Shi ◽  
Qiaoqiao Guo ◽  
Siqi Zhang ◽  
...  
Keyword(s):  
Lake Sediment ◽  
Sediment Core ◽  
Lake Sediment Core

Lake Sediment Core Records of Sulphur Accumulation and Sulphur Isotopic Composition in Central Ontario, Canada Lakes

2006 ◽  
Vol 35 (1) ◽  
pp. 99-109 ◽  
Author(s):  
M. Catherine Eimers ◽  
Andrew M. Paterson ◽  
Peter J. Dillon ◽  
Sherry L. Schiff ◽  
Brian F. Cumming ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Lake Sediment ◽  
Sediment Core ◽  
Lake Sediment Core ◽  
Sulphur Isotopic Composition

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.

DEGLACIAL CLIMATE VARIABILITY IN NORTHERN NEW JERSEY INFERED FROM A LAKE SEDIMENT CORE

2016 ◽  
Author(s):  
Seth J. Getch ◽  
◽  
Kyle G. Hansen ◽  
Michael L. Griffiths ◽  
Stefanie A. Brachfeld ◽  
...  
Keyword(s):  
New Jersey ◽  
Climate Variability ◽  
Lake Sediment ◽  
Sediment Core ◽  
Lake Sediment Core

Anthropogenic mercury deposition in Flin Flon Manitoba and the Experimental Lakes Area Ontario (Canada): A multi-lake sediment core reconstruction

2017 ◽  
Vol 586 ◽  
pp. 685-695 ◽  
Author(s):  
Johan A. Wiklund ◽  
Jane L. Kirk ◽  
Derek C.G. Muir ◽  
Marlene Evans ◽  
Fan Yang ◽  
...  
Keyword(s):  
Lake Sediment ◽  
Sediment Core ◽  
Mercury Deposition ◽  
Experimental Lakes Area ◽  
Lake Sediment Core ◽  
Flin Flon
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