| Title |
Relationships Between Nitrogen Transformation Rates and Gene Abundance in a Riparian Buffer Soil
|
|---|---|
| Published in |
Environmental Management, August 2012
|
| DOI | 10.1007/s00267-012-9929-z |
| Pubmed ID | |
| Authors |
Lin Wu, Deanna L. Osmond, Alexandria K. Graves, Michael R. Burchell, Owen W. Duckworth |
| Abstract |
Denitrification is a critical biogeochemical process that results in the conversion of nitrate to volatile products, and thus is a major route of nitrogen loss from terrestrial environments. Riparian buffers are an important management tool that is widely utilized to protect water from non-point source pollution. However, riparian buffers vary in their nitrate removal effectiveness, and thus there is a need for mechanistic studies to explore nitrate dynamics in buffer soils. The objectives of this study were to examine the influence of specific types of soluble organic matter on nitrate loss and nitrous oxide production rates, and to elucidate the relationships between these rates and the abundances of functional genes in a riparian buffer soil. Continuous-flow soil column experiments were performed to investigate the effect of three types of soluble organic matter (citric acid, alginic acid, and Suwannee River dissolved organic carbon) on rates of nitrate loss and nitrous oxide production. We found that nitrate loss rates increased as citric acid concentrations increased; however, rates of nitrate loss were weakly affected or not affected by the addition of the other types of organic matter. In all experiments, rates of nitrous oxide production mirrored nitrate loss rates. In addition, quantitative polymerase chain reaction (qPCR) was utilized to quantify the number of genes known to encode enzymes that catalyze nitrite reduction (i.e., nirS and nirK) in soil that was collected at the conclusion of column experiments. Nitrate loss and nitrous oxide production rates trended with copy numbers of both nir and 16s rDNA genes. The results suggest that low-molecular mass organic species are more effective at promoting nitrogen transformations than large biopolymers or humic substances, and also help to link genetic potential to chemical reactivity. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 48 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Germany | 1 | 2% |
| Indonesia | 1 | 2% |
| Ireland | 1 | 2% |
| India | 1 | 2% |
| Canada | 1 | 2% |
| China | 1 | 2% |
| United States | 1 | 2% |
| Unknown | 41 | 85% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 15 | 31% |
| Researcher | 7 | 15% |
| Student > Master | 6 | 13% |
| Student > Bachelor | 5 | 10% |
| Other | 4 | 8% |
| Other | 5 | 10% |
| Unknown | 6 | 13% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 17 | 35% |
| Agricultural and Biological Sciences | 6 | 13% |
| Engineering | 4 | 8% |
| Biochemistry, Genetics and Molecular Biology | 2 | 4% |
| Medicine and Dentistry | 2 | 4% |
| Other | 5 | 10% |
| Unknown | 12 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 22 September 2012.
All research outputs
#22,758,309
of 25,373,627 outputs
Outputs from Environmental Management
#1,820
of 1,914 outputs
Outputs of similar age
#168,103
of 186,153 outputs
Outputs of similar age from Environmental Management
#24
of 26 outputs
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