| Title |
Organic Layer Serves as a Hotspot of Microbial Activity and Abundance in Arctic Tundra Soils
|
|---|---|
| Published in |
Microbial Ecology, September 2012
|
| DOI | 10.1007/s00248-012-0125-8 |
| Pubmed ID | |
| Authors |
Seung-Hoon Lee, Inyoung Jang, Namyi Chae, Taejin Choi, Hojeong Kang |
| Abstract |
Tundra ecosystem is of importance for its high accumulation of organic carbon and vulnerability to future climate change. Microorganisms play a key role in carbon dynamics of the tundra ecosystem by mineralizing organic carbon. We assessed both ecosystem process rates and community structure of Bacteria, Archaea, and Fungi in different soil layers (surface organic layer and subsurface mineral soil) in an Arctic soil ecosystem located at Spitsbergen, Svalbard during the summer of 2008 by using biochemical and molecular analyses, such as enzymatic assay, terminal restriction fragment length polymorphism (T-RFLP), quantitative polymerase chain reaction (qPCR), and pyrosequencing. Activity of hydrolytic enzymes showed difference according to soil type. For all three microbial communities, the average gene copy number did not significantly differ between soil types. However, archaeal diversities appeared to differ according to soil type, whereas bacterial and fungal diversity indices did not show any variation. Correlation analysis between biogeochemical and microbial parameters exhibited a discriminating pattern according to microbial or soil types. Analysis of the microbial community structure showed that bacterial and archaeal communities have different profiles with unique phylotypes in terms of soil types. Water content and hydrolytic enzymes were found to be related with the structure of bacterial and archaeal communities, whereas soil organic matter (SOM) and total organic carbon (TOC) were related with bacterial communities. The overall results of this study indicate that microbial enzyme activity were generally higher in the organic layer than in mineral soils and that bacterial and archaeal communities differed between the organic layer and mineral soils in the Arctic region. Compared to mineral soil, peat-covered organic layer may represent a hotspot for secondary productivity and nutrient cycling in this ecosystem. |
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 81 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 3 | 4% |
| Mexico | 2 | 2% |
| Sweden | 1 | 1% |
| Canada | 1 | 1% |
| Denmark | 1 | 1% |
| Belgium | 1 | 1% |
| Unknown | 72 | 89% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 26 | 32% |
| Student > Master | 15 | 19% |
| Researcher | 10 | 12% |
| Student > Bachelor | 6 | 7% |
| Professor | 4 | 5% |
| Other | 11 | 14% |
| Unknown | 9 | 11% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 43 | 53% |
| Biochemistry, Genetics and Molecular Biology | 10 | 12% |
| Environmental Science | 10 | 12% |
| Chemistry | 2 | 2% |
| Unspecified | 1 | 1% |
| Other | 4 | 5% |
| Unknown | 11 | 14% |
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 18 September 2012.
All research outputs
#20,166,700
of 22,678,224 outputs
Outputs from Microbial Ecology
#1,834
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Outputs of similar age
#150,286
of 168,699 outputs
Outputs of similar age from Microbial Ecology
#12
of 12 outputs
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