{"xmlId":"65797","NOAAStudyId":"26793","studyName":"Birch - George LaRoi Forest Plot - PPTR - ITRDB CANA561","doi":"https://doi.org/10.25921/feqv-gn55","uuid":"e0367997-f639-4ecf-a0c8-343b780a3c6d","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site."},"dataType":"TREE RING","investigators":"Birch, J.D.","investigatorDetails":[{"firstName":"Joseph","lastName":"Birch","initials":"J.D.","orcId":"0000-0001-8644-7345"}],"version":"1.0","funding":[{"fundingAgency":"Natural Sciences and Engineering Research Council of Canada (NSERC)","fundingGrant":null}],"studyNotes":"Chronologies of four co-occurring tree species within a long-term forest plot at the southern ecotone of the Canadian boreal forest. The naming format for each species' cores is as follows: Picea glauca (GLP01A), Betula papyrifera (GLB01A), Pinus banksiana (GLJ01A), Populus tremuloides (GLA01A). NOAA Template Raw Measurements file added 2019-08-22.","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/26793","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-26793.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-tree-26793.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/tree-ring","studyCode":"CANA561","scienceKeywords":["Populus tremuloides Michx.","quaking aspen","PPTR"],"reconstruction":"N","contributionDate":"2019-05-15","entryId":"noaa-tree-26793","earliestYearBP":19,"mostRecentYearBP":-67,"earliestYearCE":1931,"mostRecentYearCE":2017,"publication":[{"author":{"name":"Joseph D. Birch, James A. Lutz, E. H. Hogg, Suzanne W. Simard, Rick Pelletier, George H. LaRoi, Justine Karst"},"pubYear":2019,"title":"Decline of an ecotone forest: 50 years of demography in the southern boreal forest","journal":"Ecosphere","volume":"10","edition":null,"issue":"4","pages":null,"reportNumber":null,"citation":"Joseph D. Birch, James A. Lutz, E. H. Hogg, Suzanne W. Simard, Rick Pelletier, George H. LaRoi, Justine Karst. 2019. Decline of an ecotone forest: 50 years of demography in the southern boreal forest. Ecosphere, 10(4). doi: 10.1002/ecs2.2698","type":"publication","identifier":{"type":"doi","id":"10.1002/ecs2.2698","url":"http://dx.doi.org/10.1002/ecs2.2698"},"abstract":"Variation in tree recruitment, mortality, and growth can alter forest community composition and structure. Because tree recruitment and mortality events are generally infrequent, long-time scales are needed to confirm trends in forests. We performed a 50-yr demographic census of a forest plot located on the southern edge of the Canadian boreal forest, a region currently experiencing forest die-back in response to direct and indirect effects of recent severe droughts. Here, we show that over the last 30 yr biomass, basal area, growth, and recruitment have decreased along with a precipitous rise in mortality across the dominant tree species. The stand experienced periods of drought in combination with multiple outbreaks of forest tent caterpillar (Malacosoma disstria) and bark beetles. These insect disturbances interacted to increase mortality rates within the stand and decrease stand density. The interaction of endogenous and exogenous factors may shift forests in this region onto novel successional trajectories with the possibility of changes in regional vegetation type.","pubRank":"1"}],"site":[{"NOAASiteId":"57874","siteName":"George LaRoi Forest Plot","siteCode":null,"mappable":"Y","locationName":"Continent>North America>Canada>Alberta","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["53.40765","-113.7517"]},"properties":{"southernmostLatitude":"53.40765","northernmostLatitude":"53.40765","westernmostLongitude":"-113.7517","easternmostLongitude":"-113.7517","minElevationMeters":"712","maxElevationMeters":"712"}},"paleoData":[{"dataTableName":"CANA561","NOAADataTableId":"39156","earliestYear":1931,"mostRecentYear":2017,"timeUnit":"CE","earliestYearBP":19,"mostRecentYearBP":-67,"earliestYearCE":1931,"mostRecentYearCE":2017,"coreLengthMeters":null,"dataTableNotes":null,"species":[{"speciesCode":"PPTR","scientificName":"Populus tremuloides Michx.","resourceId":null,"commonName":["quaking aspen"]}],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana561.txt","urlDescription":"Correlation Stats","linkText":"cana561.txt","variables":[],"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana561.rwl","urlDescription":"Raw Measurements","linkText":"cana561.rwl","variables":[{"cvDataType":"TREE RING","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>year Common Era","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"TREE RING","cvWhat":"physical property>width>total ring width","cvMaterial":null,"cvError":null,"cvUnit":"length unit>millimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999","cvFormat":"Numeric","cvShortName":null}],"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana561-rwl-noaa.txt","urlDescription":"Raw Measurements - NOAA Template File","linkText":"cana561-rwl-noaa.txt","variables":[{"cvDataType":"TREE RING","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>year Common Era","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":"age_CE"},{"cvDataType":"TREE RING","cvWhat":"physical property>width>total ring width","cvMaterial":null,"cvError":null,"cvUnit":"length unit>millimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Tree ID: GLA01A; 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