Comparison of soil organic carbon and nitrogen dynamics between urban impervious surfaces and vegetation

Dados Bibliográficos

ID21648867
AutoresXiaolin Dou (0000-0002-5417-3842, State Key Laboratory of Urban and Regional Ecology, Research Center for Eco‐Environmental Sciences Chinese Academy of Sciences Beijing PR China), Meng Lü (0000-0002-6850-581X, School of Ecology and Environmental Sciences Yunnan University Kunming PR China), Liding Chen (0000-0001-8713-8552, State Key Laboratory of Urban and Regional Ecology, Research Center for Eco‐Environmental Sciences Chinese Academy of Sciences Beijing PR China, autor correspondente)
Ano2021
Volume32
Fascículo18
Páginas5455-5467
Data de publicação2021-12-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoLand Degradation and Development (JOURNAL)
Identificadores do periódicoISSN: 1085-3278 • E-ISSN: 1099-145X
EditoraWiley (PUBLISHER • GB)
DOI10.1002/ldr.4121
OpenAlexW3203842101
IdiomaEN
Referências citadas46

Impervious surfaces (IS) are widespread globally due to increasing urbanization, and relatively static carbon (C) and nitrogen (N) processes are usually expected in these soils. However, an understanding of how soil organic carbon (SOC) and soil organic nitrogen (SON) dynamics under IS in comparison with urban vegetation is still lacking. Here we used soil fractionation and stable isotopic analysis to examine C and N dynamics in IS soils and soils that were vegetated for 20–30 years in Guangzhou and Shenzhen, China. Soil samples from bare land (CK) and other land uses (grass, forest, and IS) were split into different chemical fractions. The C and N content, C:N ratio, δ 13 C, δ 15 N, C and N recalcitrant indices (RIC, RIN), and mean residence time (MRT) were analyzed. The results showed that soil C and N stocks increased in the first (20 years) as reflected in the enhanced labile (LP) and recalcitrant C pools (RP), but then stabilized or decreased after 30 years with the IS ages in both cities. IS had a lower SOC decomposition rate and thus resulted in 5–10‐times longer MRT (259–465 years) than that in vegetated soils (39–55 years). The study showed that IS caused remarkable changes in soil C and N pools and turnover rates compared with vegetated lands. Our results are potentially useful for better understanding, predicting, and managing soil C dynamics under urbanization

Biology · Carbon fibers · Impervious surface · Nitrogen · Soil carbon · Soil water · Total organic carbon · Urbanization · Chemistry · Environmental Science · Land Use and Ecosystem Services · Soil erosion and sediment transport · Urban Heat Island Mitigation · Ecology · Environmental Chemistry · Soil Science