Search results for "FOREST DECLINE"

showing 3 items of 3 documents

Modelling forest decline using SMOS soil moisture and vegetation optical depth

2018

Global change is increasing the risk of forest decline worldwide, impacting carbon and water cycles. Hence, there is an urgent need for predicting forest decline occurrence. To that purpose, this study links forest decline events in Catalonia, detected by the DEBOSCAT forest monitoring program, with information from the Soil Moisture and Ocean Salinity (SMOS) satellite. Firstly, this study reviews the role of the SMOS soil moisture in a previous forest decline episode occurred in 2012, where the authors concluded that dry soils increased the probability of observing decline in broadleaved forests. Secondly, the present study detects that forest decline in 2012 and 2016 was linked to very dr…

0106 biological sciences010504 meteorology & atmospheric sciencesArtificial satellites in navigationClimate changeGlobal change010603 evolutionary biology01 natural sciencesMonitoring programForest declineSalinitySatèl·lits artificials en navegacióHydric soil:Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció [Àrees temàtiques de la UPC]Soil waterEnvironmental scienceClimate changeVegetation optical depthPhysical geography:Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços [Àrees temàtiques de la UPC]Soil moistureSòls -- HumitatWater cycleWater content0105 earth and related environmental sciencesSMOS
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Statistical modelling and RCS detrending methods provide similar estimates of long-term trend in radial growth of common beech in north-eastern France

2011

International audience; Dendrochronological methods have greatly contributed to the documentation of past long-term trends in forest growth. These methods primarily focus on the high-frequency signals of tree ring chronologies. They require the removal of the ageing trend in tree growth, known as 'standardisation' or 'detrending', as a prerequisite to the estimation of such trends. Because the approach is sequential, it may however absorb part of the low-frequency historical signal. In this study, we investigate the effect of a sequential and a simultaneous estimation of the ageing trend on the chronology of growth. We formerly developed a method to estimate historical changes in growth, in…

0106 biological sciences[SDV.SA]Life Sciences [q-bio]/Agricultural sciences010504 meteorology & atmospheric sciencesFagus sylvatica[SDE.MCG]Environmental Sciences/Global ChangesMagnitude (mathematics)FOREST DECLINEstandardisationPlant Sciencegrowth trends01 natural sciencesAGING[SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/EcosystemsFagus sylvatica[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture forestryFORESTSSampling designDendrochronologyEconometricsSOIL FERTILITYHETRE COMMUNstatistical modellingBeech0105 earth and related environmental sciencesEstimationSequential estimation[STAT.AP]Statistics [stat]/Applications [stat.AP]EcologybiologydendrochronologyDEVELOPMENTAL STAGES ESTIMATIONSampling (statistics)STATISTICAL ANALYSIS15. Life on landbiology.organism_classificationEnvironmental scienceGROWTH Physical geographyGROWTH RINGS010606 plant biology & botany
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Changes in land use and physiological transitions of a Juniperus thurifera forest: from decline to recovery

2015

All Rights Reserved. Forest decline is frequently associated with infection; however, infections habitually affect trees that have been previously debilitated by environmental stress. Nevertheless, the causes and physiology of noninfectious forest decline are not well known. Some Juniperus thurifera L. forests presented severe (noninfectious) declines, with defoliations over 50%. The goal of this study was to determine the causes and characterize the physiology of this noninfectious decline, and we hypothesized that it could be related to environmental stress from increasing interspecific competition resulting from land abandonment. We randomly assigned60 trees to either a control group or …

Global and Planetary ChangeLand abandonmentForest managementEcologybiologyLand useEcologyForestrybiology.organism_classificationAffect (psychology)Forest declineEnvironmental stressJuniperus thuriferaJuniperus thuriferaGlobal changeCanadian Journal of Forest Research
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