Impacts of bioturbation on temporal variation in bacterial and archaeal nitrogen-cycling gene abundance in coastal sediments

Laverock, B, Tait, K, Gilbert, J, Osborn, A and Widdicombe, S 2014, 'Impacts of bioturbation on temporal variation in bacterial and archaeal nitrogen-cycling gene abundance in coastal sediments', Environmental Microbiology Reports, vol. 6, no. 1, pp. 113-121.


Document type: Journal Article
Collection: Journal Articles

Title Impacts of bioturbation on temporal variation in bacterial and archaeal nitrogen-cycling gene abundance in coastal sediments
Author(s) Laverock, B
Tait, K
Gilbert, J
Osborn, A
Widdicombe, S
Year 2014
Journal name Environmental Microbiology Reports
Volume number 6
Issue number 1
Start page 113
End page 121
Total pages 9
Publisher Wiley-Blackwell Publishing
Abstract In marine environments, macrofauna living in or on the sediment surface may alter the structure, diversity and function of benthic microbial communities. In particular, microbial nitrogen (N)-cycling processes may be enhanced by the activity of large bioturbating organisms. Here, we study the effect of the burrowing mud shrimp Upogebia deltaura upon temporal variation in the abundance of genes representing key N-cycling functional guilds. The abundance of bacterial genes representing different N-cycling guilds displayed different temporal patterns in burrow sediments in comparison with surface sediments, suggesting that the burrow provides a unique environment where bacterial gene abundances are influenced directly by macrofaunal activity. In contrast, the abundances of archaeal ammonia oxidizers varied temporally but were not affected by bioturbation, indicating differential responses between bacterial and archaeal ammonia oxidizers to environmental physicochemical controls. This study highlights the importance of bioturbation as a control over the temporal variation in nitrogen-cycling microbial community dynamics within coastal sediments.
DOI - identifier 10.1111/1758-2229.12115
Copyright notice © 2013 The Authors. Environmental Microbiology Reports published by Society for Applied Microbiology and John Wiley & Sons Ltd.
ISSN 1758-2229
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