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Soil Organic Carbon Signature under Impervious Surfaces

Wang, Ying-Hui ; Shi, Ya-Meng ; Sun, Guo-Dong ; Li, Jintao LU ; Chen, Huan ; Chow, Alex T. ; Yang, Zhi-Bing ; Majidzadeh, Hamed and Wang, Jun-Jian (2020) In ACS Earth and Space Chemistry 4(10). p.1785-1792
Abstract
While impervious surface expands with global urbanization, understanding the quality and quantity changes of soil organic carbon (SOC) under impervious surfaces is essential to assess the impacts of urbanization on the SOC pool and cycling. By comparing soils under impervious surfaces with surface and subsurface soils from adjoining open areas, we present a systematic study on the SOC signature under impervious surfaces. SOC concentration barely changed when comparing soils under impervious surfaces with subsurface soil from the nearby open area; however, the depletion on SOC was 35–62% when it was compared with surface soils. Regardless of comparison with surface or subsurface soils, bulk-level 13C NMR spectra and specific molecular... (More)
While impervious surface expands with global urbanization, understanding the quality and quantity changes of soil organic carbon (SOC) under impervious surfaces is essential to assess the impacts of urbanization on the SOC pool and cycling. By comparing soils under impervious surfaces with surface and subsurface soils from adjoining open areas, we present a systematic study on the SOC signature under impervious surfaces. SOC concentration barely changed when comparing soils under impervious surfaces with subsurface soil from the nearby open area; however, the depletion on SOC was 35–62% when it was compared with surface soils. Regardless of comparison with surface or subsurface soils, bulk-level 13C NMR spectra and specific molecular biomarkers showed a depletion in carbohydrates and an increase in aromatics in SOC composition. Such an alteration was greater with coverage by concrete slabs than simulated home structures built on crawl spaces and was greater as the coverage duration of residential home structures increased. Long-term coverage of residential home structures suppressed microbial degradation and selectively increased the sequestration of plant suberin- and lignin-derived carbon, which would likely increase the residence time of SOC. This study highlights a possible impact of urbanization on the SOC signature and emphasizes that biogeochemical impacts on SOC vary with the type of impervious surface and coverage time.

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author
; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
ACS Earth and Space Chemistry
volume
4
issue
10
pages
1785 - 1792
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85096292829
ISSN
2472-3452
DOI
10.1021/acsearthspacechem.0c00174
language
English
LU publication?
no
id
eeee6b9e-c43c-4d7d-8940-a1eeccfabca2
date added to LUP
2022-03-12 03:32:09
date last changed
2022-04-25 22:51:19
@article{eeee6b9e-c43c-4d7d-8940-a1eeccfabca2,
  abstract     = {{While impervious surface expands with global urbanization, understanding the quality and quantity changes of soil organic carbon (SOC) under impervious surfaces is essential to assess the impacts of urbanization on the SOC pool and cycling. By comparing soils under impervious surfaces with surface and subsurface soils from adjoining open areas, we present a systematic study on the SOC signature under impervious surfaces. SOC concentration barely changed when comparing soils under impervious surfaces with subsurface soil from the nearby open area; however, the depletion on SOC was 35–62% when it was compared with surface soils. Regardless of comparison with surface or subsurface soils, bulk-level 13C NMR spectra and specific molecular biomarkers showed a depletion in carbohydrates and an increase in aromatics in SOC composition. Such an alteration was greater with coverage by concrete slabs than simulated home structures built on crawl spaces and was greater as the coverage duration of residential home structures increased. Long-term coverage of residential home structures suppressed microbial degradation and selectively increased the sequestration of plant suberin- and lignin-derived carbon, which would likely increase the residence time of SOC. This study highlights a possible impact of urbanization on the SOC signature and emphasizes that biogeochemical impacts on SOC vary with the type of impervious surface and coverage time.<br/><br/>}},
  author       = {{Wang, Ying-Hui and Shi, Ya-Meng and Sun, Guo-Dong and Li, Jintao and Chen, Huan and Chow, Alex T. and Yang, Zhi-Bing and Majidzadeh, Hamed and Wang, Jun-Jian}},
  issn         = {{2472-3452}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{10}},
  pages        = {{1785--1792}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Earth and Space Chemistry}},
  title        = {{Soil Organic Carbon Signature under Impervious Surfaces}},
  url          = {{http://dx.doi.org/10.1021/acsearthspacechem.0c00174}},
  doi          = {{10.1021/acsearthspacechem.0c00174}},
  volume       = {{4}},
  year         = {{2020}},
}