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Microbial characteristic of soils on a latitudinal transect in Siberia

Santruckova, H; Bird, MI; Kalashnikov, YN; Grund, M; Simek, M; Grigoriev, S; Gleixner, G; Arneth, Almut LU and Schulze, ED (2003) In Global Change Biology 9(7). p.1106-1117
Abstract
Soil microbial properties were studied from localities on a transect along the Yenisei River, Central Siberia. The 1000 km-long transect, from 56°N to 68°N, passed through tundra, taiga and pine forest characteristic of Northern Russia. Soil microbial properties were characterized by dehydrogenase activity, microbial biomass, composition of microbial community (PLFAs), respiration rates, denitrification and N mineralization rates. Relationships between vegetation, latitude, soil quality (pH, texture), soil organic carbon (SOC) and the microbial properties were examined using multivariate analysis. In addition, the temperature responses of microbial growth (net growth rate) and activity (soil respiration rate) were tested by laboratory... (More)
Soil microbial properties were studied from localities on a transect along the Yenisei River, Central Siberia. The 1000 km-long transect, from 56°N to 68°N, passed through tundra, taiga and pine forest characteristic of Northern Russia. Soil microbial properties were characterized by dehydrogenase activity, microbial biomass, composition of microbial community (PLFAs), respiration rates, denitrification and N mineralization rates. Relationships between vegetation, latitude, soil quality (pH, texture), soil organic carbon (SOC) and the microbial properties were examined using multivariate analysis. In addition, the temperature responses of microbial growth (net growth rate) and activity (soil respiration rate) were tested by laboratory experiments. The major conclusions of the study are as follows:



1. Multivariate analysis of the data revealed significant differences in microbial activity. SOC clay content was positively related to clay content. Soil texture and SOC exhibited the dominant effect on soil microbial parameters, while the vegetation and climatic effects (expressed as a function of latitude) were weaker but still significant. The effect of vegetation cover is linked to SOC quality, which can control soil microbial activity.



2. When compared to fine-textured soils, coarse-textured soils have (i) proportionally more SOC bound in microbial biomass, which might result in higher susceptibility of SOC transformation to fluctuation of environmental factors, and (ii) low mineralization potential, but with a substantial part of the consumed C being transformed to microbial products.



3. The soil microbial community from the northernmost study region located within the permafrost zone appears to be adapted to cold conditions. As a result, microbial net growth rate became negative when temperature rose above 5 °C and C mineralization then exceeded C accumulation. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Global Change Biology
volume
9
issue
7
pages
1106 - 1117
publisher
Wiley-Blackwell
external identifiers
  • scopus:0043133527
ISSN
1354-1013
DOI
10.1046/j.1365-2486.2003.00596.x
language
English
LU publication?
no
id
757e52d7-052d-44f2-a8be-76702c10ac0c (old id 590306)
date added to LUP
2007-11-12 15:06:54
date last changed
2018-02-11 03:32:07
@article{757e52d7-052d-44f2-a8be-76702c10ac0c,
  abstract     = {Soil microbial properties were studied from localities on a transect along the Yenisei River, Central Siberia. The 1000 km-long transect, from 56°N to 68°N, passed through tundra, taiga and pine forest characteristic of Northern Russia. Soil microbial properties were characterized by dehydrogenase activity, microbial biomass, composition of microbial community (PLFAs), respiration rates, denitrification and N mineralization rates. Relationships between vegetation, latitude, soil quality (pH, texture), soil organic carbon (SOC) and the microbial properties were examined using multivariate analysis. In addition, the temperature responses of microbial growth (net growth rate) and activity (soil respiration rate) were tested by laboratory experiments. The major conclusions of the study are as follows:<br/><br>
<br/><br>
1. Multivariate analysis of the data revealed significant differences in microbial activity. SOC clay content was positively related to clay content. Soil texture and SOC exhibited the dominant effect on soil microbial parameters, while the vegetation and climatic effects (expressed as a function of latitude) were weaker but still significant. The effect of vegetation cover is linked to SOC quality, which can control soil microbial activity.<br/><br>
<br/><br>
2. When compared to fine-textured soils, coarse-textured soils have (i) proportionally more SOC bound in microbial biomass, which might result in higher susceptibility of SOC transformation to fluctuation of environmental factors, and (ii) low mineralization potential, but with a substantial part of the consumed C being transformed to microbial products.<br/><br>
<br/><br>
3. The soil microbial community from the northernmost study region located within the permafrost zone appears to be adapted to cold conditions. As a result, microbial net growth rate became negative when temperature rose above 5 °C and C mineralization then exceeded C accumulation.},
  author       = {Santruckova, H and Bird, MI and Kalashnikov, YN and Grund, M and Simek, M and Grigoriev, S and Gleixner, G and Arneth, Almut and Schulze, ED},
  issn         = {1354-1013},
  language     = {eng},
  number       = {7},
  pages        = {1106--1117},
  publisher    = {Wiley-Blackwell},
  series       = {Global Change Biology},
  title        = {Microbial characteristic of soils on a latitudinal transect in Siberia},
  url          = {http://dx.doi.org/10.1046/j.1365-2486.2003.00596.x},
  volume       = {9},
  year         = {2003},
}