An evaluation ofmer-specified reduction of ionic mercury as a remedial tool of a mercury-contaminated freshwater pond

1995 ◽  
Vol 14 (3-4) ◽  
pp. 343-348 ◽  
Author(s):  
Erwan Saouter ◽  
Mark Gillman ◽  
Tamar Barkay
Keyword(s):  
Freshwater Pond ◽  
Ionic Mercury

Effects of environmental factors on the seasonally change of phytoplankton populations in a closed freshwater pond

2001 ◽  
Vol 27 (5) ◽  
pp. 363-371 ◽  
Author(s):  
M.G.M Alam ◽  
N Jahan ◽  
L Thalib ◽  
B Wei ◽  
T Maekawa
Keyword(s):  
Environmental Factors ◽  
Freshwater Pond

Seasonal Variability of Magnetotactic Bacteria in a Freshwater Pond

2018 ◽  
Vol 45 (5) ◽  
pp. 2294-2302 ◽  
Author(s):  
Kuang He ◽  
Sophie C. Roud ◽  
Stuart A. Gilder ◽  
Ramon Egli ◽  
Christoph Mayr ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Magnetotactic Bacteria ◽  
Freshwater Pond

scholarly journals Assessment of the Diversity, Abundance, and Ecological Distribution of Members of Candidate Division SR1 Reveals a High Level of Phylogenetic Diversity but Limited Morphotypic Diversity

2009 ◽  
Vol 75 (12) ◽  
pp. 4139-4148 ◽  
Author(s):  
James P. Davis ◽  
Noha H. Youssef ◽  
Mostafa S. Elshahed
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Clone Library ◽  
Phylogenetic Diversity ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Rrna Gene ◽  
Qpcr Analysis ◽  
Freshwater Pond ◽  
Candidate Division

ABSTRACT We used a combination of 16S rRNA gene clone library surveys, quantitative PCR (qPCR) analysis, and fluorescent in situ hybridization to investigate the diversity, abundance, and distribution of members of candidate division SR1 in multiple habitats. Using SR1-specific 16S rRNA gene primers, we identified multiple novel SR1 lineages in four different anaerobic environments: sediments from Zodletone Spring, a sulfide- and sulfur-rich spring in southwestern Oklahoma; inner layers of microbial mats obtained from Sperm Pool, a high-temperature, low-pH pool (55°C, pH 2.5) in Yellowstone National Park; fresh bovine ruminal contents; and anaerobic freshwater pond sediments (Duck Pond) in Norman, Oklahoma. qPCR analysis indicated that SR1 members constitute a small fraction (<0.01%) of the microbial communities in Duck Pond and ruminal samples but constitute a significant fraction (11.6 and 48.7%) of the total number of bacterial 16S rRNA genes in Zodletone Spring and the inner layers of Sperm Pool microbial mat samples, respectively. By using SR1-specific fluorescent probes, filamentous cells were identified as the sole SR1 morphotype in all environments examined, with the exception of Sperm Pool, where a second bacillus morphotype was also identified. Using a full-cycle 16S rRNA approach, we show that each of these two morphotypes corresponds to a specific phylogenetic lineage identified in the Sperm Pool clone library. This work greatly expands the intralineage phylogenetic diversity within candidate division SR1 and provides valuable quantification and visualization tools that could be used for investigating the ecological roles, dynamics, and genomics of this as-yet-uncultured bacterial phylum.

scholarly journals Food web including infectious agents for a California freshwater pond

Ecology ◽  
2012 ◽  
Vol 93 (7) ◽  
pp. 1760-1760 ◽  
Author(s):  
Daniel L. Preston ◽  
Sarah A. Orlofske ◽  
John P. McLaughlin ◽  
Pieter T. J. Johnson
Keyword(s):  
Food Web ◽  
Infectious Agents ◽  
Freshwater Pond
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