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| Titel |
Bimodality of woody cover and biomass across the precipitation gradient in West Africa |
| VerfasserIn |
Z. Yin, S. C. Dekker, B. J. J. M. van den Hurk, H. A. Dijkstra |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 5, no. 2 ; Nr. 5, no. 2 (2014-07-10), S.257-270 |
| Datensatznummer |
250115364
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| Publikation (Nr.) |
 copernicus.org/esd-5-257-2014.pdf |
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| Zusammenfassung |
| Multiple states of woody cover under similar climate conditions are found in
both conceptual models and observations. Due to the limitation of the
observed woody cover data set, it is unclear whether the observed bimodality
is caused by the presence of multiple stable states or is due to dynamic
growth processes of vegetation. In this study, we combine a woody cover data
set with an aboveground biomass data set to investigate the simultaneous
occurrences of savanna and forest states under the same precipitation
forcing. To interpret the results we use a recently developed vegetation
dynamics model (the Balanced Optimality Structure Vegetation Model), in which
the effect of fires is included. Our results show that bimodality also exists
in aboveground biomass and retrieved vegetation structure. In addition, the
observed savanna distribution can be understood as derived from a stable
state and a slightly drifting (transient) state, the latter having the
potential to shift to the forest state. Finally, the results indicate that
vegetation structure (horizontal vs. vertical leaf extent) is a crucial
component for the existence of bimodality. |
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