Drought Resistance Across California Ecosystems: Evaluating Changes In Carbon Dynamics Using Satellite Imagery

dc.creatorMalone
dc.creatorSparkle L.; Tulbure
dc.creatorMirela G.; Perez-Luque
dc.creatorAntonio J.; Assal
dc.creatorTimothy J.; Bremer
dc.creatorLeah L.; Drucker
dc.creatorDebora P.; Hillis
dc.creatorVicken; Varela
dc.creatorSara; Goulden
dc.creatorMichael L.
dc.date2016
dc.datenov
dc.date2017-11-13T13:44:35Z
dc.date2017-11-13T13:44:35Z
dc.date.accessioned2018-03-29T05:59:14Z
dc.date.available2018-03-29T05:59:14Z
dc.identifierEcosphere. Wiley-blackwell, v. 7, p. , 2016.
dc.identifier2150-8925
dc.identifierWOS:000392207600018
dc.identifier10.1002/ecs2.1561
dc.identifierhttp://onlinelibrary.wiley.com/doi/10.1002/ecs2.1561/abstract
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/328805
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1365830
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionDrought is a global issue that is exacerbated by climate change and increasing anthropogenic water demands. The recent occurrence of drought in California provides an important opportunity to examine drought response across ecosystem classes (forests, shrublands, grasslands, and wetlands), which is essential to understand how climate influences ecosystem structure and function. We quantified ecosystem resistance to drought by comparing changes in satellite-derived estimates of water-use efficiency (WUE = net primary productivity [NPP]/evapotranspiration [ET]) under normal (i.e., baseline) and drought conditions (Delta WUE = WUE2014 - baseline WUE). With this method, areas with increasing WUE under drought conditions are considered more resilient than systems with declining WUE. Baseline WUE varied across California (0.08 to 3.85 g C/mm H2O) and WUE generally increased under severe drought conditions in 2014. Strong correlations between Delta WUE, precipitation, and leaf area index (LAI) indicate that ecosystems with a lower average LAI (i.e., grasslands) also had greater C-uptake rates when water was limiting and higher rates of carbon-uptake efficiency (CUE = NPP/LAI) under drought conditions. We also found that systems with a baseline WUE <= 0.4 exhibited a decline in WUE under drought conditions, suggesting that a baseline WUE <= 0.4 might be indicative of low drought resistance. Drought severity, precipitation, and WUE were identified as important drivers of shifts in ecosystem classes over the study period. These findings have important implications for understanding climate change effects on primary productivity and C sequestration across ecosystems and how this may influence ecosystem resistance in the future.
dc.description7
dc.description11
dc.descriptionNational Science Foundation at the National Center for Ecological Analysis and Synthesis (NCEAS), a center - University of California, Santa Barbara [OCI-1216894]
dc.descriptionState of California
dc.descriptionNCEAS
dc.descriptionMICINN (Spanish Government) [PTA 2011-6322-I]
dc.descriptionUSAID
dc.descriptionU.S. Department of State through the Sustainable landscapes Brazil program
dc.descriptionAustralian Research Council [DE140101608]
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageEnglish
dc.publisherWiley-Blackwell
dc.publisherHoboken
dc.relationEcosphere
dc.rightsaberto
dc.sourceWOS
dc.subjectCarbon-uptake Efficiency
dc.subjectDrought Effects
dc.subjectEcosystem Resistance
dc.subjectEcosystem Type Conversions
dc.subjectPrimary Productivity
dc.subjectWater-use Efficiency
dc.titleDrought Resistance Across California Ecosystems: Evaluating Changes In Carbon Dynamics Using Satellite Imagery
dc.typeArtículos de revistas


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