20171027
Author : Hamed Majidzadeh, B. Graeme Lockaby, Robin Governo
Title : Effect of home construction on soil carbon storage-A chronosequence case study
Journal : Environmental Pollution
Comment : Previous research documents a significant reduction in SOC and TN, however, it is unclear if this decrease is a result of top soil removal or long-term soil sealing.
In this study, soil biogeochemical properties were quantified beneath homes built on a crawl space at two depths (0-10 cm, and 10-20 cm). All homes, 11-114 years in age, were sampled in the Piedmont region of Alabama and Georgia, USA.
The difference in SOC beneath homes and adjoining urban lawns showed a quadratic relation with age. Maximum SOC loss occurred at approximately fifty years. The same pattern was observed for Microbial biomass carbon : C ratio suggesting that the SOC content was decreasing beneath the homes for first fifty years, then increased afterward.
The average SOC and TN content in the top 10 cm were respectively 61.86% (±4.42%), and 65.77% (±5.65%) lower underneath the homes in comparison to urban lawns.
Microbial biomass carbon, and nitrogen were significantly lower below the homes compared to the
urban lawns, while bulk density and phosphorus content were higher beneath the homes.
Comment : Previous research documents a significant reduction in SOC and TN, however, it is unclear if this decrease is a result of top soil removal or long-term soil sealing.
In this study, soil biogeochemical properties were quantified beneath homes built on a crawl space at two depths (0-10 cm, and 10-20 cm). All homes, 11-114 years in age, were sampled in the Piedmont region of Alabama and Georgia, USA.
The difference in SOC beneath homes and adjoining urban lawns showed a quadratic relation with age. Maximum SOC loss occurred at approximately fifty years. The same pattern was observed for Microbial biomass carbon : C ratio suggesting that the SOC content was decreasing beneath the homes for first fifty years, then increased afterward.
The average SOC and TN content in the top 10 cm were respectively 61.86% (±4.42%), and 65.77% (±5.65%) lower underneath the homes in comparison to urban lawns.
Microbial biomass carbon, and nitrogen were significantly lower below the homes compared to the
urban lawns, while bulk density and phosphorus content were higher beneath the homes.
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