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| Titel |
Typhoons exert significant but differential impacts on net ecosystem carbon exchange of subtropical mangrove forests in China |
| VerfasserIn |
H. Chen, W. Lu, G. Yan, S. Yang, G. Lin |
| 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 ; 11, no. 19 ; Nr. 11, no. 19 (2014-10-02), S.5323-5333 |
| Datensatznummer |
250117620
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| Publikation (Nr.) |
 copernicus.org/bg-11-5323-2014.pdf |
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| Zusammenfassung |
| Typhoons are very unpredictable natural disturbances to subtropical mangrove
forests in Asian countries, but little information is available on how these
disturbances affect ecosystem level carbon dioxide (CO2) exchange of
mangrove wetlands. In this study, we examined short-term effect of frequent
strong typhoons on defoliation and net ecosystem CO2 exchange (NEE) of
subtropical mangroves, and also synthesized 19 typhoons during a 4-year
period between 2009 and 2012 to further investigate the regulation
mechanisms of typhoons on ecosystem carbon and water fluxes following
typhoon disturbances. Strong wind and intensive rainfall caused defoliation
and local cooling effect during the typhoon season. Daily total NEE values
decreased by 26–50% following some typhoons (e.g., W28-Nockten,
W35-Molave and W35-Lio-Fan), but significantly increased (43–131%)
following typhoon W23-Babj and W38-Megi. The magnitudes and trends of daily
NEE responses were highly variable following different typhoons, which were
determined by the balance between the variances of gross ecosystem
production (GEP) and ecosystem respiration (RE). Furthermore, results from
our synthesis indicated that the landfall time of typhoon, wind speed and
rainfall were the most important factors controlling the CO2 fluxes
following typhoon events. These findings indicate that different types of
typhoon disturbances can exert very different effects on CO2 fluxes of
mangrove ecosystems and that typhoon will likely have larger impacts on
carbon cycle processes in subtropical mangrove ecosystems as the intensity
and frequency of typhoons are predicted to increase under future global
climate change scenarios. |
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