نتایج جستجو برای: microbial community

تعداد نتایج: 461090  

2014
Takeshi Miki Taichi Yokokawa Kazuaki Matsui

Ecosystems have a limited buffering capacity of multiple ecosystem functions against biodiversity loss (i.e. low multifunctional redundancy). We developed a novel theoretical approach to evaluate multifunctional redundancy in a microbial community using the microbial genome database (MBGD) for comparative analysis. In order to fully implement functional information, we defined orthologue richne...

Journal: :Ecology 2011
Daniela F Cusack Whendee L Silver Margaret S Torn Sarah D Burton Mary K Firestone

Microbial communities and their associated enzyme activities affect the amount and chemical quality of carbon (C) in soils. Increasing nitrogen (N) deposition, particularly in N-rich tropical forests, is likely to change the composition and behavior of microbial communities and feed back on ecosystem structure and function. This study presents a novel assessment of mechanistic links between mic...

2005
Y. LAN M. W. A. VERSTEGEN S. TAMMINGA B. A. WILLIAMS

To understand the relationship between the gastrointestinal inhabiting microbial community and broiler health, a literature review is presented. The available information on the development of gut microbial community, the relationship between commensal microflora and digestive function, the role of gut microorganisms on competitive exclusion of chickens against pathogens, and modulation of the ...

Journal: :Applied and environmental microbiology 2012
Xiaohui Wang Man Hu Yu Xia Xianghua Wen Kun Ding

To determine if there is a core microbial community in the microbial populations of different wastewater treatment plants (WWTPs) and to investigate the effects of wastewater characteristics, operational parameters, and geographic locations on microbial communities, activated sludge samples were collected from 14 wastewater treatment systems located in 4 cities in China. High-throughput pyroseq...

Journal: :Applied and environmental microbiology 2007
Catherine A Lozupone Micah Hamady Scott T Kelley Rob Knight

The assessment of microbial diversity and distribution is a major concern in environmental microbiology. There are two general approaches for measuring community diversity: quantitative measures, which use the abundance of each taxon, and qualitative measures, which use only the presence/absence of data. Quantitative measures are ideally suited to revealing community differences that are due to...

Journal: :International journal of food microbiology 2004
Mark Powell Wayne Schlosser Eric Ebel

The potential for competitive inhibition to limit the growth of microbial pathogens in food raises questions about the external validity of typical predictive microbiology studies and suggests the need to consider microbial community dynamics in food safety risk assessment. Ecological theory indicates, however, that community dynamics are highly complex and may be very sensitive to initial cond...

2010
Lawrence P. Wackett

CAMERA – Community Cyberinfrastructure for Advanced Marine Microbial Ecology Research and Analysis http://camera.calit2.net/ CMAERA is a tool to aid people using metagenomics to study microbial community ecology. A major emphasis is on marine microbial ecosystems. Genomes on Line: Metagenomes http://www.genomesonline.org/gold.cgi?want= Metagenomes The Genomes on line database (GOLD) is an excel...

R. Valizadeh S.H. Ebrahimi, V. Heidarian Miri

Swiss Saanen goat is a widespread breed frequently found in commercial herds across the world. The present study aimed to identify the rumen microbial community of exotic Saanen goats adapted to a fibrous diet using barcoded pyrosequencing. Rumen content samples were collected from the four animals via a stomach tube after the morning graze and freeze-dried for DNA extraction. Bacterial and arc...

2015
Stephen M. Techtmann Julian L. Fortney Kati A. Ayers Dominique C. Joyner Thomas D. Linley Susan M. Pfiffner Terry C. Hazen

The waters of the Eastern Mediterranean are characterized by unique physical and chemical properties within separate water masses occupying different depths. Distinct water masses are present throughout the oceans, which drive thermohaline circulation. These water masses may contain specific microbial assemblages. The goal of this study was to examine the effect of physical and geological pheno...

2014
Masanori Fujimoto Gregory A. Moyerbrailean Sifat Noman Jason P. Gizicki Michal L. Ram Phyllis A. Green Jeffrey L. Ram

The impact of NaOH as a ballast water treatment (BWT) on microbial community diversity was assessed using the 16S rRNA gene based Ion Torrent sequencing with its new 400 base chemistry. Ballast water samples from a Great Lakes ship were collected from the intake and discharge of both control and NaOH (pH 12) treated tanks and were analyzed in duplicates. One set of duplicates was treated with t...

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