Evaluating theories of drought-induced vegetation mortality using a multimodel-experiment framework

Evaluating theories of drought-induced vegetation mortality using a multimodel-experiment framework

No claim to original US goverment works. New Phytologist © 2013 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1990. - 200(2013), 2 vom: 01. Okt., Seite 304-321
1. Verfasser: McDowell, Nate G (VerfasserIn)
Weitere Verfasser: Fisher, Rosie A, Xu, Chonggang, Domec, J C, Hölttä, Teemu, Mackay, D Scott, Sperry, John S, Boutz, Amanda, Dickman, Lee, Gehres, Nathan, Limousin, Jean Marc, Macalady, Alison, Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Plaut, Jennifer A, Ogée, Jérôme, Pangle, Robert E, Rasse, Daniel P, Ryan, Michael G, Sevanto, Sanna, Waring, Richard H, Williams, A Park, Yepez, Enrico A, Pockman, William T
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Review carbon starvation cavitation die-off dynamic global vegetation models (DGVMs) hydraulic failure photosynthesis process-based models Water mehr... 059QF0KO0R Carbon 7440-44-0
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100 1 |a McDowell, Nate G  |e verfasserin  |4 aut 
245 1 0 |a Evaluating theories of drought-induced vegetation mortality using a multimodel-experiment framework 
264 1 |c 2013 
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500 |a Date Completed 15.04.2014 
500 |a Date Revised 09.03.2022 
500 |a published: Print-Electronic 
500 |a Citation Status MEDLINE 
520 |a No claim to original US goverment works. New Phytologist © 2013 New Phytologist Trust. 
520 |a SUMMARY: Model-data comparisons of plant physiological processes provide an understanding of mechanisms underlying vegetation responses to climate. We simulated the physiology of a piñon pine-juniper woodland (Pinus edulis-Juniperus monosperma) that experienced mortality during a 5 yr precipitation-reduction experiment, allowing a framework with which to examine our knowledge of drought-induced tree mortality. We used six models designed for scales ranging from individual plants to a global level, all containing state-of-the-art representations of the internal hydraulic and carbohydrate dynamics of woody plants. Despite the large range of model structures, tuning, and parameterization employed, all simulations predicted hydraulic failure and carbon starvation processes co-occurring in dying trees of both species, with the time spent with severe hydraulic failure and carbon starvation, rather than absolute thresholds per se, being a better predictor of impending mortality. Model and empirical data suggest that limited carbon and water exchanges at stomatal, phloem, and below-ground interfaces were associated with mortality of both species. The model-data comparison suggests that the introduction of a mechanistic process into physiology-based models provides equal or improved predictive power over traditional process-model or empirical thresholds. Both biophysical and empirical modeling approaches are useful in understanding processes, particularly when the models fail, because they reveal mechanisms that are likely to underlie mortality. We suggest that for some ecosystems, integration of mechanistic pathogen models into current vegetation models, and evaluation against observations, could result in a breakthrough capability to simulate vegetation dynamics 
650 4 |a Journal Article 
650 4 |a Review 
650 4 |a carbon starvation 
650 4 |a cavitation 
650 4 |a die-off 
650 4 |a dynamic global vegetation models (DGVMs) 
650 4 |a hydraulic failure 
650 4 |a photosynthesis 
650 4 |a process-based models 
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650 7 |a Carbon  |2 NLM 
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700 1 |a Fisher, Rosie A  |e verfasserin  |4 aut 
700 1 |a Xu, Chonggang  |e verfasserin  |4 aut 
700 1 |a Domec, J C  |e verfasserin  |4 aut 
700 1 |a Hölttä, Teemu  |e verfasserin  |4 aut 
700 1 |a Mackay, D Scott  |e verfasserin  |4 aut 
700 1 |a Sperry, John S  |e verfasserin  |4 aut 
700 1 |a Boutz, Amanda  |e verfasserin  |4 aut 
700 1 |a Dickman, Lee  |e verfasserin  |4 aut 
700 1 |a Gehres, Nathan  |e verfasserin  |4 aut 
700 1 |a Limousin, Jean Marc  |e verfasserin  |4 aut 
700 1 |a Macalady, Alison  |e verfasserin  |4 aut 
700 1 |a Martínez-Vilalta, Jordi  |e verfasserin  |4 aut 
700 1 |a Mencuccini, Maurizio  |e verfasserin  |4 aut 
700 1 |a Plaut, Jennifer A  |e verfasserin  |4 aut 
700 1 |a Ogée, Jérôme  |e verfasserin  |4 aut 
700 1 |a Pangle, Robert E  |e verfasserin  |4 aut 
700 1 |a Rasse, Daniel P  |e verfasserin  |4 aut 
700 1 |a Ryan, Michael G  |e verfasserin  |4 aut 
700 1 |a Sevanto, Sanna  |e verfasserin  |4 aut 
700 1 |a Waring, Richard H  |e verfasserin  |4 aut 
700 1 |a Williams, A Park  |e verfasserin  |4 aut 
700 1 |a Yepez, Enrico A  |e verfasserin  |4 aut 
700 1 |a Pockman, William T  |e verfasserin  |4 aut 
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773 1 8 |g volume:200  |g year:2013  |g number:2  |g day:01  |g month:10  |g pages:304-321 
856 4 0 |u http://dx.doi.org/10.1111/nph.12465  |3 Volltext 
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