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| Titel |
Changes in soil carbon sequestration in Pinus massoniana forests along an urban-to-rural gradient of southern China |
| VerfasserIn |
H. Chen, W. Zhang, F. Gilliam, L. Liu, J. Huang, T. Zhang, W. Wang, J. Mo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 10 ; Nr. 10, no. 10 (2013-10-22), S.6609-6616 |
| Datensatznummer |
250085370
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| Publikation (Nr.) |
 copernicus.org/bg-10-6609-2013.pdf |
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| Zusammenfassung |
| Urbanization is accelerating globally, causing a variety of environmental
changes such as increases in air temperature, precipitation, atmospheric
CO2, and nitrogen (N) deposition. However, the effects of these changes
on forest soil carbon (C) sequestration remain largely unclear. Here, we used
urban-to-rural environmental gradients in Guangdong Province, southern China,
to address the potential effects of these environmental changes on soil C
sequestration in Pinus massoniana forests. In contrast to our
expectations and earlier observations, soil C content in urban sites was
significantly lower than that in suburban and rural sites. Lower soil C pools
in urban sites were correlated with a significant decrease in fine root
biomass and a potential increase in soil organic C decomposition. Variation
of soil C pools was also a function of change in soil C fractions. Heavy
fraction C content in urban sites was significantly lower than that in
suburban and rural sites. By contrast, light fraction C content did not vary
significantly along the urban-to-rural gradient. Our results suggest that
urbanization-induced environmental changes may have a negative effect on
forest soil C in the studied region. |
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