Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 42, Issue 10, Pages 1888-1891Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2010.06.020
Keywords
15N; Ammonia oxidizer; amoA; Archaea; Bacteria; Nitrification; qPCR; TRFLP; Water filled pore space
Categories
Funding
- ARC [DP0985832]
- Australian Research Council [DP0985832] Funding Source: Australian Research Council
Ask authors/readers for more resources
This study examined the effect of water filled pore space (WFPS) on gross N fluxes and community structure and abundance of ammonia oxidizing archaea and bacteria in a semi-arid soil. Different WFPS altered the community structure of both AOA and AOB. Ammonia oxidizer communities (for both archaea and bacteria) from 'wet' soils (95, 85 and 75% WFPS) and 'dry' soils (25, 45 and 55% WFPS) were distinctly different from one another. Additionally there was a significant relationship between community structure and gross rates of nitrification. There was also a significant relationship between WFPS and bacterial amoA abundance but not archaeal amoA abundance suggesting that bacterial ammonia oxidizers are more responsive to changes in soil water availability. These results are in agreement with other studies suggesting that both groups of ammonia oxidizers have distinct physiological characteristics and ecological niches with consequences for nitrification in response to WFPS. Overall findings from this study indicate that nitrification, both in terms of process rates and populations responsible for nitrification activity, is highly responsive to soil water availability. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available