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| Titel |
Vegetation dynamics and soil water balance in a water-limited Mediterranean ecosystem on Sardinia, Italy |
| VerfasserIn |
N. Montaldo, J. D. Albertson, M. Mancini |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 12, no. 6 ; Nr. 12, no. 6 (2008-11-25), S.1257-1271 |
| Datensatznummer |
250010955
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| Publikation (Nr.) |
 copernicus.org/hess-12-1257-2008.pdf |
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| Zusammenfassung |
| Mediterranean ecosystems are commonly heterogeneous savanna-like ecosystems,
with contrasting plant functional types (PFTs, e.g. grass and woody
vegetation) competing for water. Mediterranean ecosystems are also commonly
characterized by strong inter-annual rainfall variability, which influences
the distributions of PFTs that vary spatially and temporally. An extensive
field campaign in a Mediterranean setting was performed with the objective to
investigate interactions between vegetation dynamics, soil water budget and
land-surface fluxes in a water-limited ecosystem. Also a vegetation dynamic
model (VDM) is coupled to a 3-component (bare soil, grass and woody
vegetation) Land surface model (LSM). The case study is in Orroli, situated
in the mid-west of Sardegna within the Flumendosa river basin. The landscape
is a mixture of Mediterranean patchy vegetation types: trees, including wild
olives and cork oaks, different shrubs and herbaceous species. Land surface
fluxes, soil moisture and vegetation growth were monitored during the May
2003–June 2006 period. Interestingly, hydrometeorological conditions of the
monitored years strongly differ, with dry and wet years in turn, such that a
wide range of hydrometeorological conditions can be analyzed. The coupled
VDM-LSM model is successfully tested for the case study, demonstrating high
model performance for the wide range of eco-hydrologic conditions. Results
demonstrate also that vegetation dynamics are strongly influenced by the
inter-annual variability of atmospheric forcing, with grass leaf area index
changing significantly each spring season according to seasonal rainfall
amount. |
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