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Niche differentiation of ammonia-oxidising archaea (AOA) and bacteria (AOB) in response to paper and pulp mill effluent
Citation
Abell, GCJ and Ross, DJ and Keane, J and Holmes, BH and Robert, SS and Keough, MJ and Eyre, BD and Volkman, JK, Niche differentiation of ammonia-oxidising archaea (AOA) and bacteria (AOB) in response to paper and pulp mill effluent, Microbial Ecology, 67, (4) pp. 758-768. ISSN 0095-3628 (2014) [Refereed Article]
Copyright Statement
Copyright 2014 Springer Science+Business Media New York
DOI: doi:10.1007/s00248-014-0376-7
Abstract
Sediment organic loading has been shown to affect
estuarine nitrification and denitrification, resulting in changes
to sediment biogeochemistry and nutrient fluxes detrimental
to estuarine health. This study examined the effects of organic
loading on nutrient fluxes and microbial communities in sediments
receiving effluent from a paper and pulp mill (PPM) by
applying microcosm studies and molecular microbial ecology
techniques. Three sites near the PPM outfall were compared to
three control sites, one upstream and two downstream of the
outfall. The control sites showed coupled nitrification–denitrification
with minimal ammonia release from the sediment.
In contrast, the impacted sites were characterised by nitrate
uptake and substantial ammonia efflux from the sediments,
consistent with a decoupling of nitrification and denitrification.
Analysis of gene diversity demonstrated that the composition
of nitrifier communities was not significantly different
at the impacted sites compared to the control sites; however,
analysis of gene abundance indicated that whilst there was no
difference in total bacteria, total archaea or ammonia oxidising
archaea (AOA) abundance between the control
and impacted sites, there was a significant reduction in
ammonia-oxidising bacteria (AOB) at the impacted sites.
The results of this study demonstrate an effect of organic
loading on estuarine sediment biogeochemistry and highlight
an apparent niche differentiation between AOA and AOB.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and Estuarine Ecology (incl. Marine Ichthyology) |
| Objective Division: | Environment |
| Objective Group: | Ecosystem Assessment and Management |
| Objective Field: | Ecosystem Assessment and Management of Coastal and Estuarine Environments |
| Author: | Ross, DJ (Dr Jeff Ross) |
| Author: | Keane, J (Dr John Keane) |
| ID Code: | 91319 |
| Year Published: | 2014 |
| Web of Science® Times Cited: | 5 |
| Deposited By: | Sustainable Marine Research Collaboration |
| Deposited On: | 2014-05-14 |
| Last Modified: | 2017-11-03 |
| Downloads: | 0 |
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