25Environmental Symbiosis Science DivisionEnvironmental Symbiosis Science DivisionLaboratory of Wild Resource Plant ScienceLaboratory for Forest EnvironmentTeruoARASEAssociateProfessor,Ph.D.,CuratorKoh YASUEAssociate Professor, Ph.D.Plantecology,Phytogeography,Planttaxonomy,Utilization&evaluationofwildresourceplant,Vegetationrecovery,StatisticsforfieldscienceDendrochronology, Wood anatomy,Climate change,Radial growth,Tree ringTreetrunkplaystwoimportantroleinreductionofatmosphericCO2concentration,1)majorsinkofcarboninterrestrialecosystemsand2)sustainablecarbonneutralmaterials.Wetargetedontherelationshipbetweenclimatechangeandtreeradialgrowththatdevelopswood.Tree ring is an indicator of responses of trees to environmental changes. We utilize tree rings for estimation of changes in radial growth to future climate changes. We can also reconstruct past climate changes using dendroclimatologicaltechniques.ThepurposeoftheLaboratoryofWildResourcePlantScienceistostudytheecologyandtaxonomyofwildplants(e.g.edibleplants,medicinalplants,orplantsavailableforvegetationrecovery),fortheiruseinagronomyandsilviculture.WemanagetheonlyherbariumintheFacultyofAgriculturewherenumeroustaxonomicspecimensaregarnered.Tree radial growth and climate changeDendrochronologyWe focused on tree ring structures such as density, cell dimensions. Observations on seasonal radial growth and stable isotopes in annual rings can provide good information for understanding wood formation and environmental changes.Wood anatomy and formationEcology, phytogeography, taxonomy of wild plantsUtilization and evaluation of wild resource plantsEcology of wild birds related to vegetation recovery, agronomy and silvicultureCreation, conservation and management of biotopeStatistics for field science, especially for vegetation, ecological succession, and plant morphologyHerbarium specimens managed in our laboratorySamples of edible and medicinal fruits (left)Vegetation survey by students (right) ABCDABCABDCStudy sites in circum-polarClarification of radial growth mechanisms by anatomical observation and stable isotope tracing experiment.Dendroecological studies at various sites among Japan and circumpolar region.
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