scholarly journals Bacterial abundance and diversity in pond water supplied with different feeds

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ya Qin ◽  
Jie Hou ◽  
Ming Deng ◽  
Quansheng Liu ◽  
Chongwei Wu ◽  
...  
Keyword(s):  
Bacterial Abundance ◽  
Pond Water ◽  
Abundance And Diversity

Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions

2019 ◽  
Vol 129 ◽  
pp. 29-38 ◽  
Author(s):  
Yuanyuan Yang ◽  
Raphael A. Viscarra Rossel ◽  
Shuo Li ◽  
Andrew Bissett ◽  
Juhwan Lee ◽  
...  
Keyword(s):  
Bacterial Abundance ◽  
Transfer Functions ◽  
Soil Bacterial ◽  
Abundance And Diversity

Variation in Biological Soil Crust Bacterial Abundance and Diversity as a Function of Climate in Cold Steppe Ecosystems in the Intermountain West, USA

2017 ◽  
Vol 74 (3) ◽  
pp. 691-700 ◽  
Author(s):  
Erika S. Blay ◽  
Stacy G. Schwabedissen ◽  
Timothy S. Magnuson ◽  
Ken A. Aho ◽  
Peter P. Sheridan ◽  
...  
Keyword(s):  
Bacterial Abundance ◽  
Biological Soil Crust ◽  
Soil Crust ◽  
Intermountain West ◽  
Steppe Ecosystems ◽  
Abundance And Diversity

scholarly journals Bacterial Abundance and Community Composition in Pond Water From Shrimp Aquaculture Systems With Different Stocking Densities

2018 ◽  
Vol 9 ◽  
Author(s):  
Yustian Rovi Alfiansah ◽  
Christiane Hassenrück ◽  
Andreas Kunzmann ◽  
Arief Taslihan ◽  
Jens Harder ◽  
...  
Keyword(s):  
Community Composition ◽  
Bacterial Abundance ◽  
Pond Water ◽  
Shrimp Aquaculture

scholarly journals Dynamics of Bacterial and Viral Communities in Paddy Soil with Irrigation and Urea Application

Viruses ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 347 ◽  
Author(s):  
Yuting Li ◽  
Hao Sun ◽  
Weichao Yang ◽  
Guanxiong Chen ◽  
Hui Xu
Keyword(s):  
Bacterial Abundance ◽  
Nitrogen Addition ◽  
Nitrogen Fixing ◽  
Short Term ◽  
Nitrogen Fixing Bacteria ◽  
Ecological Processes ◽  
N Accumulation ◽  
Natural Systems ◽  
Viral Communities ◽  
Abundance And Diversity

Viruses are ubiquitous in natural systems. By influencing bacterial abundance (BA) and community structure through lysis-lysogenic conversion, viruses are involved in various ecological processes. In agricultural management, nitrogen addition and irrigation should be considered as important factors that can modify soil viral dynamics but have been ignored. In our study, short-term dynamics of autochthonous soil viral and bacterial abundance and diversity after irrigation and urea application were examined in a long-term experimental paddy field. Urea addition delayed the emergence of peak viral abundance for three days, suggesting that viruses are sensitive to N addition. Under short-term eutrophic conditions through urea application, viruses undertake a lysogenic-biased strategy. Moreover, nitrogen-fixing bacteria were most likely specifically lysed in urea-treated soil, which suggests that soil viruses block N accumulation by killing nitrogen-fixing bacteria. To the best of our knowledge, this study is the first to investigate dynamic changes in autochthonous viruses in paddy fields.

scholarly journals Office Space Bacterial Abundance and Diversity in Three Metropolitan Areas

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e37849 ◽  
Author(s):  
Krissi M. Hewitt ◽  
Charles P. Gerba ◽  
Sheri L. Maxwell ◽  
Scott T. Kelley
Keyword(s):  
Bacterial Abundance ◽  
Metropolitan Areas ◽  
Office Space ◽  
Abundance And Diversity

scholarly journals Comparison of Innovative Molecular Approaches and Standard Spore Assays for Assessment of Surface Cleanliness

2011 ◽  
Vol 77 (15) ◽  
pp. 5438-5444 ◽  
Author(s):  
Moogega Cooper ◽  
Myron T. La Duc ◽  
Alexander Probst ◽  
Parag Vaishampayan ◽  
Christina Stam ◽  
...  
Keyword(s):  
Dna Microarray ◽  
Dna Microarrays ◽  
Bacterial Abundance ◽  
State Of The Art ◽  
Molecular Techniques ◽  
Molecular Approaches ◽  
Abundance And Diversity ◽  
Classical Culture ◽  
Genetic Signatures ◽  
Sample Set

ABSTRACTA bacterial spore assay and a molecular DNA microarray method were compared for their ability to assess relative cleanliness in the context of bacterial abundance and diversity on spacecraft surfaces. Colony counts derived from the NASA standard spore assay were extremely low for spacecraft surfaces. However, the PhyloChip generation 3 (G3) DNA microarray resolved the genetic signatures of a highly diverse suite of microorganisms in the very same sample set. Samples completely devoid of cultivable spores were shown to harbor the DNA of more than 100 distinct microbial phylotypes. Furthermore, samples with higher numbers of cultivable spores did not necessarily give rise to a greater microbial diversity upon analysis with the DNA microarray. The findings of this study clearly demonstrated that there is not a statistically significant correlation between the cultivable spore counts obtained from a sample and the degree of bacterial diversity present. Based on these results, it can be stated that validated state-of-the-art molecular techniques, such as DNA microarrays, can be utilized in parallel with classical culture-based methods to further describe the cleanliness of spacecraft surfaces.

scholarly journals CHLORINE DEMAND AND BACTERIAL ABUNDANCE OF SHRIMP POND WATER UNDER DIFFERENT SUSPENDED SOLID CONCENTRATIONS

2017 ◽  
Vol 7 (1) ◽  
pp. 16
Author(s):  
Husnah Husnah
Keyword(s):  
Bacterial Abundance ◽  
Pond Water ◽  
Suspended Solid ◽  
Indigenous Bacteria ◽  
Shrimp Pond ◽  
Chlorine Demand ◽  
Brackish Pond

An experiment has been conducted to evaluate the chlorine demand and efficacy of 6 chlorine concentrations in brackish pond water, to control indigenous bacteria in shrimps pond.

scholarly journals Use of the frc gene as a molecular marker to characterize oxalate-oxidizing bacterial abundance and diversity structure in soil

2009 ◽  
Vol 76 (2) ◽  
pp. 120-127 ◽  
Author(s):  
Nadia Khammar ◽  
Gaëtan Martin ◽  
Katia Ferro ◽  
Daniel Job ◽  
Michel Aragno ◽  
...  
Keyword(s):  
Molecular Marker ◽  
Bacterial Abundance ◽  
Abundance And Diversity ◽  
Diversity Structure

scholarly journals Pesticides Decrease Bacterial Diversity and Abundance of Irrigated Rice Fields

2020 ◽  
Vol 8 (3) ◽  
pp. 318 ◽  
Author(s):  
Michael Onwona-Kwakye ◽  
Kimberly Plants-Paris ◽  
Kadiatou Keita ◽  
Jessica Lee ◽  
Paul J. Van den Brink ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
Bacterial Abundance ◽  
Management Strategies ◽  
Diversity Indices ◽  
Rice Fields ◽  
Irrigated Rice ◽  
Operational Taxonomic Units ◽  
Soil Ecosystems ◽  
Abundance And Diversity ◽  
Aerobic And Anaerobic

Bacteria play an important role in soil ecosystems and their activities are crucial in nutrient composition and recycling. Pesticides are extensively used in agriculture to control pests and improve yield. However, increased use of pesticides on agricultural lands results in soil contamination, which could have adverse effect on its bacterial communities. Here, we investigated the effect of pesticides commonly used on irrigated rice fields on bacterial abundance and diversity. Irrigated soil samples collected from unexposed, pesticide-exposed, and residual exposure areas were cultured under aerobic and anaerobic conditions. DNA was extracted and analysed by 16S rRNA sequencing. The results showed overall decrease in bacterial abundance and diversity in areas exposed to pesticides. Operational taxonomic units of the genera Enterobacter, Aeromonas, Comamonas, Stenotrophomonas, Bordetella, and Staphylococcus decreased in areas exposed to pesticides. Conversely, Domibacillus, Acinetobacter, Pseudomonas, and Bacillus increased in abundance in pesticide-exposed areas. Simpson and Shannon diversity indices and canonical correspondence analysis demonstrated a decrease in bacterial diversity and composition in areas exposed to pesticides. These results suggest bacteria genera unaffected by pesticides that could be further evaluated to identify species for bioremediation. Moreover, there is a need for alternative ways of improving agricultural productivity and to educate farmers to adopt innovative integrated pest management strategies to reduce deleterious impacts of pesticides on soil ecosystems.

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