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| Titel |
A meta-analysis on the impacts of partial cutting on forest structure and carbon storage |
| VerfasserIn |
D. Zhou, S. Q. Zhao, S. Liu, J. Oeding |
| 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. 6 ; Nr. 10, no. 6 (2013-06-05), S.3691-3703 |
| Datensatznummer |
250018278
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| Publikation (Nr.) |
 copernicus.org/bg-10-3691-2013.pdf |
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| Zusammenfassung |
| Partial cutting, which removes some individual trees from a forest, is one of
the major and widespread forest management practices that can significantly
alter both forest structure and carbon (C) storage. Using 748 observations
from 81 studies published between 1973 and 2011, we synthesized the impacts
of partial cutting on three variables associated with forest structure (mean
annual growth of diameter at breast height (DBH), stand basal area, and
volume) and four variables related to various C stock components (aboveground
biomass C (AGBC), understory C, forest floor C, and mineral soil C). Results
show that the growth of DBH increased by 111.9% after partial cutting,
compared to the uncut control, with a 95% bootstrapped confidence
interval ranging from 92.2 to 135.9%, while stand basal area and volume
decreased immediately by 34.2% ([−37.4%, −31.2%]) and
28.4% ([−32.0%, −25.1%]), respectively. On average,
partial cutting reduced AGBC by 43.4% ([−47.7%, −39.3%]),
increased understory C storage by 391.5% ([220.0%, 603.8%]),
but did not show significant effects on C stocks on forest floor and in
mineral soil. All the effects, if significant (i.e., on DBH growth, stand
basal area, volume, and AGBC), intensified linearly with cutting intensity
and decreased linearly over time. Overall, cutting intensity had more strong
impacts than the length of recovery time on the responses of those variables
to partial cutting. Besides the significant influence of cutting intensity
and recovery time, other factors such as climate zone and forest type also
affected forest responses to partial cutting. For example, a large fraction
of the changes in DBH growth remains unexplained, suggesting the factors not
included in the analysis may play a major role. The data assembled in this
synthesis were not sufficient to determine how long it would take for a
complete recovery after cutting because long-term experiments were scarce.
Future efforts should be tailored to increase the duration of the experiments
and balance geographic locations of field studies. |
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