Laboratory of SilvicultureTetsuoOKANOProfessor,Ph.D.Longtermdynamics,Forestregeneration,Plantsociology,SilvicultureandForestSoils.Togettheforestecosystemservicessustainablyinthechangingworld,theecologicalandreasonableforestmanagementisrequired.Torealizeourobject,wetrytounderstandthebehaviorofwoodyplants,thedynamicsofforestecosystemsandtheirresponsetothehumanactivity.Becauseforestecosystemsreactsluggishlytonaturaldisturbancesandhumanimpacts,andtheirresponsesaredifferentdependingonfieldcharacteristics,weadoptthreestrategiesinourlaboratory:(1)simplelong-termmonitoring,(2)theaccumulationofdatabasedonpracticalfieldworks,(3)comparisonofthefielddatawiththetheoreticalmodels.Life History and its strategy of Woody Plants: Woody plants represent various shape and size. However, we can find the rules such as the pipe model, the elasticity model and so on. We try to integrate them under the concept of the metabolic ecology. ABCDABC写真、図Long-term monitoring site in natural oak forest in Hokkaido. Research on damaged tree. 写真、図Long-term monitoring site in Kiso to examine the regeneration process of Hinoki cypress.Vegetation Structure and Dynamics: Different plant species and its population is a unit of the vegetation. The competitive and cooperative interactions among resource and environment will result in their relationships.Silviculture and Forest Management: The objects of silviculture have been changed in the history. We try to act the conservation biodiversity in artificial forest at low cost. We also try to success the recruitment of trees in disturbed or sasa-covered land.Environmental Symbiosis Science Division26Laboratory for Watershed ConservationShinya HIRAMATSUProfessor,Ph.D.•Hillslopestability•Hydrologic properties in forest soil•Landslidesmodel•Debrisflow•SedimentyieldInJapan,sediment-relateddisastersoccurfrequentlyduetobrisksedimentyieldandsedimentdischarge.Topreventdisastersaffectingourlivesandproperties,accuratepredictionofsuchdisastersisgreatlyneeded.Therefore,fordisasterprediction,itisnecessarytounderstandandmakeclearmechanismsofsedimentproductionandsedimentyield,andallprocessesthataffectslopestability,suchasrainfallinfiltrationandrunoff.Inourlaboratory,weconductresearchonmechanismsofsediment-relateddisasterssuchashillsideslandslidesanddebrisflowinmountainousareas,andrainfall-runoffprocesses,basedonfieldmeasurementsandexperiments,fromtheviewpointofdisasterpreventionandwatershedconservation.Effects of impact force caused by earthquake on slope stabilityABCDABCField monitoring and impact assessment of trail erosion in the Kirigamine wetland in NaganoInfluence of tree root systems on vertical infiltration processesof rainwaterStudies on the effect of forest on soil stability and its limitationMonitoring of water in forest soil layerExposed tree roots due to landslide implies the effect of forest on soil stability and its limitationDecayed rootΦ5.0cmSchematic of water samplingRoot100cc CylinderEnvironmental Symbiosis Science Division
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