 |
| Titel |
Responses of aboveground and belowground forest carbon stocks to disturbances in boreal forests of Northeastern China |
| VerfasserIn |
Chao Huang, Hong S. He, Todd J. Hawbaker, Yu Liang, Peng Gong, Wuzhiwei Wu, Zhiliang Zhu |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250130223
|
| Publikation (Nr.) |
 EGU/EGU2016-10445.pdf |
|
|
|
|
|
| Zusammenfassung |
| Boreal forests represents about 1/3 of forest area and 1/3 of forest carbon on earth. Carbon
dynamics of boreal forests are sensitive to climate change, natural (e.g., fire) and
anthropogenic (e.g., harvest) disturbances. Field-based studies suggest that disturbances alter
species composition, stand structure, and litter decomposition, and have significant effects on
boreal forest carbon dynamics. Most of these studies, however, covered a relatively short
period of time (e.g., few decades), which is limited in revealing such long-term effects of
disturbances. Models are therefore developed as important tools in exploring the long-term
(e.g., hundreds of years) effects of disturbances on forest carbon dynamics. In this study, we
applied a framework of coupling forest ecosystem and landscape model to evaluating the
effect of fire, harvest and their interactions on carbon stocks in a boreal forest landscape of
Northeastern China. We compared the simulation results under fire, harvest and fire-harvest
interaction scenarios with the simulated value of succession scenario at 26 landtypes
over 150 years at a 10-year time step. Our results suggest that aboveground and
belowground carbon are significantly reduced by fire and harvest over 150years. Fire
reduced aboveground carbon by 2.3±0.6 ton/ha, harvest by 6.0±1.4 ton/ha, and fire
and harvest interaction by 8.0±1.9 tons/ha. Fire reduced belowground carbon by
4.6±3.4 ton/ha, harvest by 5.0±3.5 ton/ha, and fire-harvest interaction by 5.7±3.7
tons/ha. The divergent response of carbon stocks among landtypes and between
disturbance scenarios was due to the spatial interactions between fire, harvest, and species
composition. Our results indicated that boreal forests carbon stocks prediction needs
to consider the effects of fire and harvest for improving the estimation accuracy. |
|
|
|
|
|
|