Denitrification in a large river: consideration of geomorphic controls on microbial activity and community structure

Ecology ◽  
2013 ◽  
Vol 94 (10) ◽  
pp. 2249-2262 ◽  
Author(s):  
Corianne Tatariw ◽  
Elise L. Chapman ◽  
Ryan A. Sponseller ◽  
Behzad Mortazavi ◽  
Jennifer W. Edmonds
Keyword(s):  
Community Structure ◽  
Microbial Activity ◽  
Large River

Microbial activity and community structure in degraded soils on the Loess Plateau of China

2009 ◽  
Vol 172 (1) ◽  
pp. 118-126 ◽  
Author(s):  
Ute Hamer ◽  
Franz Makeschin ◽  
Shaoshan An ◽  
Fenli Zheng
Keyword(s):  
Community Structure ◽  
Microbial Activity ◽  
Loess Plateau ◽  
The Loess Plateau

scholarly journals Rare microbes from diverse Earth biomes dominate community activity

2019 ◽  
Author(s):  
Rohan Sachdeva ◽  
Barbara J. Campbell ◽  
John F. Heidelberg
Keyword(s):  
Community Structure ◽  
Microbial Activity ◽  
Ecosystem Function ◽  
Total Activity ◽  
Reaction Rates ◽  
Community Activity ◽  
Crucial Component ◽  
Tightly Coupled ◽  
The Relationship

AbstractMicrobes are the Earth’s most numerous organisms and are instrumental in driving major global biological and chemical processes. Microbial activity is a crucial component of all ecosystems, as microbes have the potential to control any major biochemical process. In recent years, considerable strides have been made in describing the community structure,i.e. diversity and abundance, of microbes from the Earth’s major biomes. In virtually all environments studied, a few highly abundant taxa dominate the structure of microbial communities. Still, microbial diversity is high and is concentrated in the less abundant, or rare, fractions of the community,i.e. the “long tail” of the abundance distribution. The relationship between microbial community structure and activity, specifically the role of rare microbes, and its connection to ecosystem function, is not fully understood. We analyzed 12.3 million metagenomic and metatranscriptomic sequence assemblies and their genes from environmental, human, and engineered microbiomes, and show that microbial activity is dominated by rare microbes (96% of total activity) across all measured biomes. Further, rare microbial activity was comprised of traits that are fundamental to ecosystem and organismal health,e.g. biogeochemical cycling and infectious disease. The activity of rare microbes was also tightly coupled to temperature, revealing a link between basic biological processes,e.g. reaction rates, and community activity. Our study provides a broadly applicable and predictable paradigm that implicates rare microbes as the main microbial drivers of ecosystem function and organismal health.

Impact of bovine urine deposition on soil microbial activity, biomass, and community structure

2010 ◽  
Vol 44 (1) ◽  
pp. 89-100 ◽  
Author(s):  
K.H. Orwin ◽  
J.E. Bertram ◽  
T.J. Clough ◽  
L.M. Condron ◽  
R.R. Sherlock ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Activity ◽  
Soil Microbial Activity ◽  
Bovine Urine ◽  
Soil Microbial

Experimentally induced effects of heavy metal on microbial activity and community structure of forest mor layers

2007 ◽  
Vol 44 (1) ◽  
pp. 79-91 ◽  
Author(s):  
Staffan Åkerblom ◽  
Erland Bååth ◽  
Lage Bringmark ◽  
Ewa Bringmark
Keyword(s):  
Heavy Metal ◽  
Community Structure ◽  
Microbial Activity ◽  
Experimentally Induced
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