Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.5194/bgd-9-6293-2012 |
| Titel (primär) | Sensitivity of North Patagonian temperate rainforests to changes in rainfall regimes: a process-based, dynamic forest model |
| Autor | Gutiérrez, A.G.; Armesto, J.J.; Díaz, M.F.; Huth, A. |
| Quelle | Biogeosciences Discussions |
| Erscheinungsjahr | 2012 |
| Department | OESA |
| Band/Volume | 9 |
| Heft | 6 |
| Seite von | 6293 |
| Seite bis | 6333 |
| Sprache | englisch |
| Abstract | Rainfall changes due to climate change and
their potential impacts on forests demand the
development of predictable tools coupling vegetation dynamics to
hydrologic processes. Such tools
need to be accurate at local scales (i.e. < 100 ha) to develop
efficient forest
management strategies for climate change adaptation. In this study, we
developed and tested
a dynamic forest model to predict hydrological balance of North
Patagonian temperate rainforests
on Chiloé Island, Chile (42° S). The developed model includes detailed
calculations
of forest water fluxes and incorporates the dynamical linkage of
rainfall regimes to soil
moisture, and individual tree growth. We confronted model results with
detailed field measurements
of water fluxes in a young secondary stand (YS). We used the model to
compare forest sensitivity
in the YS and an old-growth stand (OG, > 500 yr-old), i.e. changes
in forest
evapotranspiration, soil moisture and forest structure (biomass and
basal area). We evaluated sensitivity using changes in rainfall regimes
comparable to future climatic scenarios for this
century in the study region. The model depicted well the hydrological
balance of temperate
rainforests. We found a higher evapotranspiration in OG than YS under
current climatic
conditions. Dryer climatic conditions predicted for this century in
the study area led to changes
in the hydrological balance that impacted forest structure, with
stronger impacts in OG. Changes
in climatic parameters decreased evapotranspiration (up to 15 % in OG
compared to current
values) and soil moisture to 32 % . These changes in water fluxes
induced decreases in
above-ground biomass in OG (up to 27 %). Our results support the use
of the model for
detailed analyses of climate change impacts on hydrological balance of
forests. Also, it provides
a tool suitable for analyses of the impacts of multiple drivers of
global change on forest
processes (e.g., climate change, fragmentation, forest management). |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=12773 |
| Gutiérrez, A.G., Armesto, J.J., Díaz, M.F., Huth, A. (2012): Sensitivity of North Patagonian temperate rainforests to changes in rainfall regimes: a process-based, dynamic forest model Biogeosciences Discussions 9 (6), 6293 - 6333 10.5194/bgd-9-6293-2012 |
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