نتایج جستجو برای: bacterial community

تعداد نتایج: 555623  

2017
Rafael Grossi Botelho Sérgio Henrique Monteiro Valdemar Luiz Tornisielo

In recent years, pharmaceutical pollution in the environment has been a great concern due to the potential effects on the human and animal health. Some of the most used classes such as antibiotics, which are used to prevent and treat bacterial infections and promote the growth of livestock, deserve to be highlighted since their intensive use has contaminated environmental matrices such as soil,...

2014
Hye Min Kim Ji Young Jung Etienne Yergeau Chung Yeon Hwang Larry Hinzman Sungjin Nam Soon Gyu Hong Ok-Sun Kim Jongsik Chun Yoo Kyung Lee

The subarctic region is highly responsive and vulnerable to climate change. Understanding the structure of subarctic soil microbial communities is essential for predicting the response of the subarctic soil environment to climate change. To determine the composition of the bacterial community and its relationship with soil properties, we investigated the bacterial community structure and proper...

Journal: :Ecology letters 2009
Noah Fierer Michael S Strickland Daniel Liptzin Mark A Bradford Cory C Cleveland

Although belowground ecosystems have been studied extensively and soil biota play integral roles in biogeochemical processes, surprisingly we have a limited understanding of global patterns in belowground biomass and community structure. To address this critical gap, we conducted a meta-analysis of published data (> 1300 datapoints) to compare belowground plant, microbial and faunal biomass acr...

Journal: :Molecular ecology 2013
Kamlesh Jangid William B Whitman Leo M Condron Benjamin L Turner Mark A Williams

The physicochemical and biological gradients of soil and vegetative succession along the Franz Josef chrono sequence in New Zealand were used to test whether bacterial communities show patterns of change associated with long-term ecosystem development. Pyrosequencing was conducted on soil-derived 16S rRNA genes at nine stages of ecosystem progression and retrogression, ranging in age from 60 to...

2010
David H. Green Mark C. Hart Susan I. Blackburn Christopher J. S. Bolch

Gymnodinium catenatum Graham (Dinophyceae) is one of several marine dinoflagellates responsible for outbreaks of paralytic shellfish poisoning (PSP), a problem that is considered to be increasing globally. Bacteria associated with these dinoflagellates have been implicated as potentially involved with the production of PSP toxins, and this study sought to identify whether there was a link betwe...

2014
Jun Zhao Tian Ni Yong Li Wu Xiong Wei Ran Biao Shen Qirong Shen Ruifu Zhang

Soil physicochemical properties, soil microbial biomass and bacterial community structures in a rice-wheat cropping system subjected to different fertilizer regimes were investigated in two seasons (June and October). All fertilizer regimes increased the soil microbial biomass carbon and nitrogen. Both fertilizer regime and time had a significant effect on soil physicochemical properties and ba...

Journal: :Applied and environmental microbiology 1997
T C Gsell W E Holben R M Ventullo

The cell density, activity, and community structure of the bacterial community in wetland sediments were monitored over a 13-month period. The study was performed at Cedar Bog, an alkaline fen. The objective was to characterize the relationship between the sediment bacterial community in groundwater upwelling zones and the physical and chemical factors which might influence the community struct...

Journal: :Environmental toxicology and chemistry 2007
Ales Lapanje Maja Rupnik Damjana Drobne

Prokaryotes are of high importance in the assessment of environmental pollution effects. Due to fast responsiveness of bacterial communities to environmental physicochemical factors, it is difficult to compare results of bacterial community investigations on the temporal and spatial scale. To reduce the effects of variable physicochemical environmental conditions on bacterial microbiota when in...

Journal: :Applied and environmental microbiology 2007
Christian Winter Thomas Hein Gerhard Kavka Robert L Mach Andreas H Farnleitner

The Danube River is the second longest river in Europe, and its bacterial community composition has never been studied before over its entire length. In this study, bacterial community composition was determined by denaturing gradient gel electrophoresis (DGGE) analysis of PCR-amplified portions of the bacterial 16S rRNA gene from a total of 98 stations on the Danube River (73 stations) and its...

2015
Arnab Pramanik Pijush Basak Satabdi Banerjee Sanghamitra Sengupta Dhrubajyoti Chattopadhyay Maitree Bhattacharyya

Brackish water lake is the most extraordinary reservoir for bacterial community with an adaptability of tolerance to saline stress. In the present study, metagenomic approach was implemented utilising 454-pyrosequencing platform to gain deeper insights into the bacterial diversity profile of the soil sediment of Chilika Lake, Odisha, India. Metagenome contained 68,150 sequences with 31,896,430 ...

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