Microbial responses to soil rewetting in erosional and depositional environments in relation to the organic carbon dynamics

Jinquan Huang, Zhongwu Li, Xiaodong Nie, Jiachao Zhang, Zhenghong Tang, Wenming Ma, Wei Yu, Guangming Zeng

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In order to investigate the microbial responses to soil rewetting in erosional and depositional environments in relation to organic carbon dynamics, three contrastive plots (in erosional, transitional, and depositional areas) were imposed with varying erosion or deposit characteristics in a typical sloping cropland of the red soil region in south China. The cropland was rewetted uniformly by a simulated rainfall under field conditions, and the three plots in the land were sampled before and 180. h after rewetting. Soil organic carbon (SOC) pools, DNA-based microbial abundance, and community structure were measured. In response to rewetting, the erosional area had greater microbial abundance than the transitional or depositional sites. The variations in bacterial and fungal abundance were not significantly correlated with the dynamics of soil carbon pools at site or during the whole experimental period. Bacterial diversity increased immediately after rewetting at downslope positions, especially in the depositional area. Fungal community structure was less sensitive to rewetting than that of bacteria and was rather dynamic at the erosional site compared with the depositional site. Together with site variables, the carbon data set significantly (P<. 0.01) explained the variations of bacterial and fungal community structures after rewetting. To conclude, site erosion or deposit characteristics may affect the drying/rewetting (D/R) susceptibility of soil biogeochemical carbon cycles by inducing shifts in functional microbial communities with different responses to rewetting.

Original languageEnglish (US)
Pages (from-to)256-264
Number of pages9
JournalGeomorphology
Volume204
DOIs
StatePublished - Jan 1 2014

Fingerprint

rewetting
depositional environment
organic carbon
soil
community structure
erosion
red soil
soil carbon
carbon cycle
microbial community
DNA
rainfall
bacterium
carbon

Keywords

  • Bacteria
  • Community composition
  • Fungi
  • Rewetting
  • Soil carbon dynamics
  • Soil erosion

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Microbial responses to soil rewetting in erosional and depositional environments in relation to the organic carbon dynamics. / Huang, Jinquan; Li, Zhongwu; Nie, Xiaodong; Zhang, Jiachao; Tang, Zhenghong; Ma, Wenming; Yu, Wei; Zeng, Guangming.

In: Geomorphology, Vol. 204, 01.01.2014, p. 256-264.

Research output: Contribution to journalArticle

Huang, Jinquan ; Li, Zhongwu ; Nie, Xiaodong ; Zhang, Jiachao ; Tang, Zhenghong ; Ma, Wenming ; Yu, Wei ; Zeng, Guangming. / Microbial responses to soil rewetting in erosional and depositional environments in relation to the organic carbon dynamics. In: Geomorphology. 2014 ; Vol. 204. pp. 256-264.
@article{f69dbb75e51148698018b7f2f7bb628f,
title = "Microbial responses to soil rewetting in erosional and depositional environments in relation to the organic carbon dynamics",
abstract = "In order to investigate the microbial responses to soil rewetting in erosional and depositional environments in relation to organic carbon dynamics, three contrastive plots (in erosional, transitional, and depositional areas) were imposed with varying erosion or deposit characteristics in a typical sloping cropland of the red soil region in south China. The cropland was rewetted uniformly by a simulated rainfall under field conditions, and the three plots in the land were sampled before and 180. h after rewetting. Soil organic carbon (SOC) pools, DNA-based microbial abundance, and community structure were measured. In response to rewetting, the erosional area had greater microbial abundance than the transitional or depositional sites. The variations in bacterial and fungal abundance were not significantly correlated with the dynamics of soil carbon pools at site or during the whole experimental period. Bacterial diversity increased immediately after rewetting at downslope positions, especially in the depositional area. Fungal community structure was less sensitive to rewetting than that of bacteria and was rather dynamic at the erosional site compared with the depositional site. Together with site variables, the carbon data set significantly (P<. 0.01) explained the variations of bacterial and fungal community structures after rewetting. To conclude, site erosion or deposit characteristics may affect the drying/rewetting (D/R) susceptibility of soil biogeochemical carbon cycles by inducing shifts in functional microbial communities with different responses to rewetting.",
keywords = "Bacteria, Community composition, Fungi, Rewetting, Soil carbon dynamics, Soil erosion",
author = "Jinquan Huang and Zhongwu Li and Xiaodong Nie and Jiachao Zhang and Zhenghong Tang and Wenming Ma and Wei Yu and Guangming Zeng",
year = "2014",
month = "1",
day = "1",
doi = "10.1016/j.geomorph.2013.08.010",
language = "English (US)",
volume = "204",
pages = "256--264",
journal = "Geomorphology",
issn = "0169-555X",
publisher = "Elsevier",

}

TY - JOUR

T1 - Microbial responses to soil rewetting in erosional and depositional environments in relation to the organic carbon dynamics

AU - Huang, Jinquan

AU - Li, Zhongwu

AU - Nie, Xiaodong

AU - Zhang, Jiachao

AU - Tang, Zhenghong

AU - Ma, Wenming

AU - Yu, Wei

AU - Zeng, Guangming

PY - 2014/1/1

Y1 - 2014/1/1

N2 - In order to investigate the microbial responses to soil rewetting in erosional and depositional environments in relation to organic carbon dynamics, three contrastive plots (in erosional, transitional, and depositional areas) were imposed with varying erosion or deposit characteristics in a typical sloping cropland of the red soil region in south China. The cropland was rewetted uniformly by a simulated rainfall under field conditions, and the three plots in the land were sampled before and 180. h after rewetting. Soil organic carbon (SOC) pools, DNA-based microbial abundance, and community structure were measured. In response to rewetting, the erosional area had greater microbial abundance than the transitional or depositional sites. The variations in bacterial and fungal abundance were not significantly correlated with the dynamics of soil carbon pools at site or during the whole experimental period. Bacterial diversity increased immediately after rewetting at downslope positions, especially in the depositional area. Fungal community structure was less sensitive to rewetting than that of bacteria and was rather dynamic at the erosional site compared with the depositional site. Together with site variables, the carbon data set significantly (P<. 0.01) explained the variations of bacterial and fungal community structures after rewetting. To conclude, site erosion or deposit characteristics may affect the drying/rewetting (D/R) susceptibility of soil biogeochemical carbon cycles by inducing shifts in functional microbial communities with different responses to rewetting.

AB - In order to investigate the microbial responses to soil rewetting in erosional and depositional environments in relation to organic carbon dynamics, three contrastive plots (in erosional, transitional, and depositional areas) were imposed with varying erosion or deposit characteristics in a typical sloping cropland of the red soil region in south China. The cropland was rewetted uniformly by a simulated rainfall under field conditions, and the three plots in the land were sampled before and 180. h after rewetting. Soil organic carbon (SOC) pools, DNA-based microbial abundance, and community structure were measured. In response to rewetting, the erosional area had greater microbial abundance than the transitional or depositional sites. The variations in bacterial and fungal abundance were not significantly correlated with the dynamics of soil carbon pools at site or during the whole experimental period. Bacterial diversity increased immediately after rewetting at downslope positions, especially in the depositional area. Fungal community structure was less sensitive to rewetting than that of bacteria and was rather dynamic at the erosional site compared with the depositional site. Together with site variables, the carbon data set significantly (P<. 0.01) explained the variations of bacterial and fungal community structures after rewetting. To conclude, site erosion or deposit characteristics may affect the drying/rewetting (D/R) susceptibility of soil biogeochemical carbon cycles by inducing shifts in functional microbial communities with different responses to rewetting.

KW - Bacteria

KW - Community composition

KW - Fungi

KW - Rewetting

KW - Soil carbon dynamics

KW - Soil erosion

UR - http://www.scopus.com/inward/record.url?scp=84887227589&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84887227589&partnerID=8YFLogxK

U2 - 10.1016/j.geomorph.2013.08.010

DO - 10.1016/j.geomorph.2013.08.010

M3 - Article

AN - SCOPUS:84887227589

VL - 204

SP - 256

EP - 264

JO - Geomorphology

JF - Geomorphology

SN - 0169-555X

ER -