{"xmlId":"73737","NOAAStudyId":"32074","studyName":"Boyd - Interior Alaska Aspen Site SA1032 - PPTR - ITRDB AK179","doi":"https://doi.org/10.25921/d3fp-8965","uuid":"59f60563-4b20-4f32-b88e-1a950d0566a3","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":"Boyd, M.; Berner, L.T.; Foster, A.; Goetz, S.; Rogers, B.; Walker, X.; Mack, M.","investigatorDetails":[{"firstName":"Melissa","lastName":"Boyd","initials":"M.","orcId":"0000-0003-2681-8567"},{"firstName":"Logan","lastName":"Berner","initials":"L.T.","orcId":"0000-0001-8947-0479"},{"firstName":"Adrianna","lastName":"Foster","initials":"A.","orcId":"0000-0002-7382-0013"},{"firstName":"Scott","lastName":"Goetz","initials":"S.","orcId":"0000-0002-6326-4308"},{"firstName":"Brendan","lastName":"Rogers","initials":"B.","orcId":"0000-0001-6711-8466"},{"firstName":"Xanthe","lastName":"Walker","initials":"X.","orcId":"0000-0002-2448-691X"},{"firstName":"Michelle","lastName":"Mack","initials":"M.","orcId":"0000-0003-1279-4242"}],"version":"1.0","funding":[{"fundingAgency":"US National Aeronautics and Space Administration (NASA)","fundingGrant":"NNX17AE44G"},{"fundingAgency":"Strategic Environmental Research and Development Program","fundingGrant":"RC18-C2-1183"},{"fundingAgency":"US National Science Foundation","fundingGrant":"DEB-1636476"},{"fundingAgency":"USDA Forest Service","fundingGrant":"RJVA-PNW-01-JV-11261952-231"}],"studyNotes":"This data file contains raw ring-width chronologies of individual trees that died (dying) and survived (living) an insect oubreak of Phyllocnistis populiella (outbreak period: 1997-2013) in Interior Alaska.  Living trees have ring-width measurements up to 2015 and the tree names are preceded by TA whereas dying tree ring-width measurements end in 1997-2013 and the tree names are preceded by TM. NOAA Template Raw Measurements file added 2021-02-22","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/32074","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-32074.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-tree-32074.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/tree-ring","studyCode":"AK179","scienceKeywords":["Populus tremuloides Michx.","quaking aspen","PPTR"],"reconstruction":"N","contributionDate":"2020-12-16","entryId":"noaa-tree-32074","earliestYearBP":39,"mostRecentYearBP":-65,"earliestYearCE":1911,"mostRecentYearCE":2015,"publication":[{"author":{"name":"Melissa A. Boyd, Logan T. Berner, Adrianna C. Foster, Scott J. Goetz, Brendan M. Rogers, Xanthe J. Walker, Michelle C. Mack"},"pubYear":2021,"title":"Historic declines in growth portend trembling aspen death during a contemporary leaf miner outbreak in Alaska","journal":"Ecosphere","volume":"12","edition":"e03569","issue":"6","pages":null,"reportNumber":null,"citation":"Melissa A. Boyd, Logan T. Berner, Adrianna C. Foster, Scott J. Goetz, Brendan M. Rogers, Xanthe J. Walker, Michelle C. Mack. 2021. Historic declines in growth portend trembling aspen death during a contemporary leaf miner outbreak in Alaska. Ecosphere, 12(6), e03569. doi: 10.1002/ecs2.3569","type":"publication","identifier":{"type":"doi","id":"10.1002/ecs2.3569","url":"http://dx.doi.org/10.1002/ecs2.3569"},"abstract":"Climate change-driven droughts and insect outbreaks are becoming more frequent and widespread, increasing forest vulnerability to mortality. By addressing the impacts of climate and insects on tree growth preceding death, we can better understand tree mortality risk under a changing climate. Here, we used tree stature and interannual growth (basal area increment; BAI) to assess processes leading to trembling aspen (Populus tremuloides) survival or mortality during an unprecedented leaf miner (Phyllocnistis populiella) outbreak in boreal North America. We identified eight sites (22 plots) in the longest running forest monitoring network in Alaska, spanning ~350 km of latitude, that experienced >=0.25 Mg ha-1 yr-1 aspen mortality during the outbreak. We compared the size and canopy position, growth patterns, and sensitivity to climate and leaf mining of aspen that survived (living; n = 84) vs. died (dying; n = 76) and linked the normalized difference vegetation index (NDVI) to plot-level aspen growth and stand biomass recruitment, growth, and mortality. Dying aspen were in the subcanopy, smaller in diameter, and after a drought in 1957 had lower growth than living aspen until death. Before the outbreak, growth of all trees was positively influenced by moisture and negatively by temperature, but only living trees maintained this climate response during the outbreak. Leaf mining reduced growth of both groups, exerting at least a twofold greater impact than climate. The NDVI captured plot-level tree growth and stand biomass growth and mortality, yet it was nearly two times more strongly associated with living than dying tree growth and 12 times more strongly associated with biomass growth than mortality. These differences suggest that NDVI may inadequately detect insect-driven dieback and dispersed mortality of aspen across the boreal biome. Our findings reveal that a historic drought triggered a multi-decadal growth decline that predisposed aspen to mortality during the leaf miner outbreak and that while aspen growth is influenced by moisture and temperature, it is more strongly affected by P. populiella. We conclude that as the climate warms and insect outbreaks increase in frequency and magnitude at high latitudes, we should expect to see persistent and greater declines in aspen growth and increases in mortality.","pubRank":"1"}],"site":[{"NOAASiteId":"58635","siteName":"Interior Alaska Aspen Site SA1032","siteCode":null,"mappable":"Y","locationName":"Continent>North America>United States Of America>Alaska","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["62.047","-145.4129"]},"properties":{"southernmostLatitude":"62.047","northernmostLatitude":"62.047","westernmostLongitude":"-145.4129","easternmostLongitude":"-145.4129","minElevationMeters":"116","maxElevationMeters":"116"}},"paleoData":[{"dataTableName":"AK179","NOAADataTableId":"44619","earliestYear":1911,"mostRecentYear":2015,"timeUnit":"CE","earliestYearBP":39,"mostRecentYearBP":-65,"earliestYearCE":1911,"mostRecentYearCE":2015,"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/ak179.txt","urlDescription":"Correlation Stats","linkText":"ak179.txt","variables":[],"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak179.rwl","urlDescription":"Raw Measurements","linkText":"ak179.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":"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":"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/usa/ak179-rwl-noaa.txt","urlDescription":"Raw Measurements - NOAA Template File","linkText":"ak179-rwl-noaa.txt","variables":[{"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: TA194; 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