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Millennial-Scale Solar Variability in Tree Rings of Northern Fennoscandia at the End of the Holocene Tree Ring Res. (IF 1.6) Pub Date : 2022-10-31 Elena A. Kasatkina, Oleg I. Shumilov, Mauri Timonen, Evgeniy O. Potorochin
To investigate the possible Sun–climate connection during the Holocene, the Finnish super-long tree-ring chronology covering the period from 5634 B.C. to A.D. 2004 was analyzed. As an indicator of solar activity, we used a reconstruction of total solar irradiance (TSI) covering 9300 years, which is based on a composite using the cosmogenic radionuclide 10Be measured in polar ice cores, and also on
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Is There a Response Pattern between Radial Growth of Trees and Elevation Gradient? Tree Ring Res. (IF 1.6) Pub Date : 2022-10-31 Liliana Cuapio-Hernández, José Luis Reyes-Ortiz, Amparo Borja De La Rosa, Numa P. Pavón, Maritza López-Herrera, José Villanueva-Díaz, Arturo Sánchez-González
Improving our understanding of the growth dynamics of trees along elevation gradients could help us predict their potential to store carbon and their vulnerability to changes in local and global environmental conditions, such as deforestation and climate change. This study is a review and analysis of the results obtained in recent dendrochronological studies of the effect of elevation and climate (temperature
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The First Network of Tree-Ring Chronologies for Co-Occurring Nothofagus nervosa and Nothofagus obliqua Along a Precipitation Gradient in Patagonia, Argentina Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 Anabela Bonada, Mariano Amoroso, Ze'ev Gedalof
We present the first network of tree-ring chronologies for co-occurring Nothofagus nervosa and Nothofagus obliqua in Argentina. Using standard dendrochronological techniques, we developed seven tree-ring width chronologies for each species, encompassing their east-west distribution along a precipitation gradient. Chronology statistics indicated that N. nervosa and N. obliqua are strong contenders for
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Co-Occurring Wyoming Pinus Species Exhibit Differing Climate–Growth Relationships Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 Laura A. Dye, Jessie K. Pearl, Laura Smith, Bethany L. Coulthard, Cori Butkiewicz, Zane Cooper, James DeGrand, Jared Friedman, Inga K. Homfeld, Hilary Howard, Leroy Ironcloud, Shannon Wray
The North American Dendroecological Field week (NADEF) is an intensive dendrochronology workshop, funded in part by the National Science Foundation. The 2019 Introductory Group at NADEF developed two precisely-dated tree-ring width chronologies for Pinus contorta (lodgepole pine) and Pinus flexilis (limber pine) at the Wolf Knob site ∼5 km west of Beartooth Lake, WY within the bounds of the Shoshone
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Pith Eccentricity, Basal Area Increments and Disturbances Inferred from Tree-Ring Growth Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 Marcos González-Cásares, Marín Pompa-García, Jaime Roberto Padilla-Martínez
Forest management constantly seeks tools that can optimize the production of goods and services. As natural archives, tree rings have proven to be effective in terms of refining the dynamics of growth on a temporal basis. This study evaluates the application of these tree rings in estimating the effect of pith eccentricity on forest growth, modeling the increase in basal area (BAI) and identifying
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Culturally Modified Trees: Peeled and Scarred Ponderosa Pine Trees in the Zuni Mountains, New Mexico, USA Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 Ronald H. Towner, Rebecca R. Renteria
Modification of forest trees can occur due to a variety of factors. Both cultural and natural processes can injure trees and many injuries can be dated dendrochronologically. Distinguishing between types of injuries, however, is important for understanding past human land-use practices and delineating different activities or processes that impacted the forest. In the Zuni Mountains of New Mexico, USA
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Using Dendroecology to Strengthen the Historic Integrity of Cumberland Homesteads Tower in Crossville, Tennessee Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 Savannah A. Collins-Key, Maegen L. Rochner, Lauren A. Stachowiak, Elizabeth A. Schneider
The Cumberland Homesteads Historic District, located on the Cumberland Plateau in East Tennessee, is home to one of the first and largest Homesteads projects attempted during the New Deal era. Although the settlement did not succeed in its original objective, the history of the Cumberland Homesteads has become a valued foundation of the local community, which in turn strives to protect the legacy of
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Absolute Age Determinations of Rural Basque Furniture Using Dendrochronology: A Pilot Study of Four Granary Chests and a Wardrobe Tree Ring Res. (IF 1.6) Pub Date : 2021-12-07 J. Susperregi, E. Jansma
Dendrochronological research in NW Spain is focussed on the development of reference chronologies of oak (Quercus sp.) that are suitable for absolute age determinations of cultural heritage from the Basque Country. So far dating research in this region has focussed on rural architecture such as farmhouses and barns. In order to extend the application range of Basque dendrochronology, the current study
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In Memoriam Stepan G. Shiyatov 1933–2021 Tree Ring Res. (IF 1.6) Pub Date : 2022-01-24 Leonid Agafonov,Rashit Hantemirov,Malcolm K. Hughes,Valeri Mazepa,Irina Panyushkina,Vladimir Shishov,Eugene A. Vaganov
StepanGrigorievich Shiyatov diedOctober 23, 2021, in Yekaterinburg, Russia. Professor Shiyatov was a leading pioneer of dendroecological and dendroclimatic studies in northern Eurasia and internationally. He had a well-deserved reputation for rigor in the central process of dendrochronology– crossdating. He early tackled other basic problems such as detrending of ring-width series and the realworld
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Assessing Dendrochronological Potential of Escallonia myrtilloides in the High Andes of Peru Tree Ring Res. (IF 1.6) Pub Date : 2021-05-21 Edilson J. Requena-Rojas, Mariano M. Amoroso, Ginette Ticse-Otarola, Doris B. Crispin-Delacruz
There is a significant dendrochronological gap in the Puna of the central Andes of Peru, which motivates research on new species. In this study, we present the first tree-ring chronologies of Escallonia myrtilloides. We collected samples at San Pedro Saño and Sapallanga in Peru, analyzed the anatomical characteristics that delimit the annual growth rings, and developed two tree-ring chronologies through
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Long Oak Tree-Ring Chronologies from Central Russia and Their Potential for Dating Tree Ring Res. (IF 1.6) Pub Date : 2021-05-21 B. F. Khasanov, A. A. Karpukhin, N. A. Krenke, M. M. Pevzner, O. A. Tarabardina, D. D. Vasyukov, M. V. Yermokhin, A. B. Savinetsky
New oak tree-ring chronologies for European Russia built with subfossil oak wood excavated from the alluvial deposits of the Zapadnaya Dvina (Daugava) River and archaeological samples from Novgorod and Vyazma are presented. They have been matched with the nearest absolutely dated tree-ring chronology constructed in Polotsk (Republic of Belarus) and dated to the periods AD 649–1382 (Zapadnaya Dvina)
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Oceanic Influence on Chiricahua Mountains Drought Observed in a 383-Year Douglas-Fir Reconstruction Tree Ring Res. (IF 1.6) Pub Date : 2021-05-21 Jose Abella-Gutiérrez, Ramzi Touchan, Jehren Boehm, Kasey Bolles, Aleyda M. Treviño, Kelly Swarts, Lis Uliana, David M. Meko
Drought in the North American Southwest is a recurring phenomenon. The knowledge of drought recurrence and severity is crucial for sustainable water resource management in the region. Tree-ring reconstructions of climate variables provide valuable indirect evidence of climate variability and elucidate the relationship between large-scale circulation anomalies and the climate in the region. Here we
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The Growth Responses of Picea abies (L.) Karst. to Increment Borer Wounding Tree Ring Res. (IF 1.6) Pub Date : 2021-05-21 Andrea Fabiánová, Karel Šilhán
As the use of the increment borer is supposed to be invasive, there is a question of how coring affects subsequent growth or the health of various tree species. Ten Picea abies (L.) Karst. trees in the Beskydy Mts. (Czech Republic) were analysed nine years after coring by an increment borer (June 2011) to determine their anatomical and growth responses to the coring. Cores (13 per tree) were extracted
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Gigapixel Macro Photography of Tree Rings Tree Ring Res. (IF 1.6) Pub Date : 2021-05-21 Daniel Griffin, Samantha T. Porter, Matthew L. Trumper, Kate E. Carlson, Daniel J. Crawford, Daniel Schwalen, Colin H. McFadden
High quality specimen digitization is becoming standard across the sciences, is relevant for curation of natural history collections, and must become a priority for dendrochronology. This paper overviews the enduring role of imaging in dendrochronology, summarizes the potential relevance of gigapixel macro photography of polished specimens, offers a long-term review of a commercial imaging system,
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The Dendroclimatological Potential of Common Yew (Taxus baccata L.) from Southern Azerbaijan Tree Ring Res. (IF 1.6) Pub Date : 2021-01-21 Farid Seyfullayev, Scott St. George, Vahid Farzaliyev, Sébastien Guillet, Markus Stoffel, Uday Kunwar Thapa
Paleoclimate reconstructions from tree rings have so far been restricted to the western and northern Caucasus, and there have been no published tree-ring studies on any topic from the Republic of Azerbaijan in the eastern Caucasus. Here we report the first tree-ring study conducted in Azerbaijan and show that, in the southern part of the country, the common yew (Taxus baccata L.) has potential to provide
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In MemoriamMinze Stuiver 1929-2020 Tree Ring Res. (IF 1.6) Pub Date : 2021-03-15 Steven W. Leavitt
Minze Stuiver, Professor Emeritus of the Quaternary Research Center at the University of Washington where he founded the Quaternary Isotope Laboratory (QIL), passed away on December 26, 2020. Minze was born at the beginning of the Depression on October 25, 1929, in Vlagtwedde, the Netherlands, where he grew up in a rudimentary home with his five family members, a single cold water faucet and stove
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Correcting Eccentric Growth Rings Using Basal Area Increment: A Case Study for a Desert Shrub in Northwestern China Tree Ring Res. (IF 1.6) Pub Date : 2020-12-08 Ai-Jun Ding, Sheng-Chun Xiao, Quan-Yan Tian, Chao Han
Because of the eccentric radial growth for shrubs, climatic signals recorded by their ring-width series tend to be distorted. We hypothesized that measured Basal Area Increment (BAI) can overcome such a weakness. We used the desert shrub Zygophyllum xanthoxylum, with eccentric radial growth to test this hypothesis. RWI (mRWI) and BAI standard chronologies were established based on the ring-width data
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A Review of Oak Dendrochronology in Eastern Europe Tree Ring Res. (IF 1.6) Pub Date : 2020-12-08 Irena Sochová, Tomáš Kolář, Michal Rybníček
Over the recent decades, a many oak tree-ring width chronologies have been used for archaeological, climatological and ecological studies, particularly across western, southern and central Europe. However, a general summary of research in the easternmost distribution of European oaks, represented mainly by Quercus robur L. and Quercus petraea (Matt.) Liebl., has been missing. Therefore, we herein overview
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Tree Story: The History of the World Written in Rings Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Katarina Čufar
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In MemoriamFritz Hans Schweingruber 1936–2020 Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Georg von Arx, Paolo Cherubini, Patrick Fonti, Daniel Nievergelt, Loïc Schneider, Kerstin Treydte, Anne Verstege, Holger Gärtner
Fritz H. Schweingruber, pioneer of tree-ring research and wood anatomy, passed away on January 7, 2020, at the age of nearly 84. Fritz was born on February 29, 1936, in Krauchthal (Canton Bern, Switzerland). From 1956 to 1965, he was a primary school teacher and an organist. Although he liked teaching, he discovered his curiosity for botany and archaeology. This was the beginning of what turned out
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Dendrochronology of a Rare, Long-Lived Mediterranean Shrub Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Ellis Q. Margolis, Keith Lombardo, Andrew Smith
ABSTRACT Ceanothus verrucosus (CEVE) is a globally rare, long-lived, chaparral shrub endemic to coastal southern California (CA) and northern Mexico. There is concern for CEVE persistence because of habitat loss, fire, and climate change, yet little is known about basic features of the plant, including whether it contains annual rings, plant age, and climate–growth response. Growth-ring analysis was
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Using Complementary Drought Proxies Improves Interpretations of Fire Histories in Montane Forests Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Raphaël D. Chavardès, Lori D. Daniels, Bianca N. I. Eskelson, Ze'ev Gedalof
ABSTRACT To investigate drought influences on mixed-severity fire regimes in montane forests of southeastern British Columbia, we developed a Douglas-fir latewood-width chronology and tested its associations with drought records across the fire season. Associations were strong between drought and latewood-widths particularly for June–August. Based on the chronology, we reconstructed the summer Drought
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Microelevational Differences Affect Longleaf Pine (Pinus palustris Mill.) Sensitivity to Tropical Cyclone Precipitation: A Case Study Using Lidar Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Evan E. Montpellier, Paul A. Knapp, Peter T. Soulé, Justin T. Maxwell
ABSTRACT Latewood ring widths of longleaf pine (Pinus palustris Mill.) growing on Carolina bay sand rims on the coastal plains of North Carolina are effective recorders of tropical cycone precipitation (TCP). Longleaf pine are hypothesized to be effective recorders of TCP because of their extensive lateral root structure that is exposed to enhanced soil moisture when TCP events raise the water table
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A Network for Advancing Dendrochronology, Dendrochemistry and Dendrohydrology in South America Tree Ring Res. (IF 1.6) Pub Date : 2020-08-31 Isabella Aguilera-Betti, Christine Lucas, María Eugenia Ferrero, Ariel A. Muñoz
ABSTRACT Tree-ring research (TRR) in South America (SA) continues to make important contributions in multiple sub-disciplines, including dendrochemistry and dendrohydrology. This report describes some of the advances in TRR in SA presented in a two-day International Meeting Research entitled “An International Network to Promote Advances in Dendrochronology in South America”, organized by the Laboratory
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A DIRECT COMPARISON OF SYMPATRIC HIGH-LATITUDE PINUS CONTORTA AND PICEA ALBERTIANA RING-WIDTH CHRONOLOGIES Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Wayne L Strong
ABSTRACT An emerging trend in tree-ring research is use of multiple species for reconstructing paleoclimates, but the possible simultaneous use of boreal-cordilleran species is untested. In this study, ring-width chronologies of sympatric Pinus contorta (lodgepole pine, n = 116 series) and Picea albertiana (western white spruce, n = 348 series) were constructed to assess their temporal (dis)similarities
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FIRE HISTORY ACROSS FOREST TYPES IN THE SOUTHERN BEARTOOTH MOUNTAINS, WYOMING Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Sabrina R. Brown, Ashley Baysinger, Peter M. Brown, Justin L. Cheek, Jeffrey M. Diez, Christopher M. Gentry, Thomas A. Grant, Jeannine-Marie St. Jacques, David A. Jordan, Morgan L. Leef, Mary K. Rourke, James H. Speer, Carrie E. Spradlin, Jens T. Stevens, Jeffery R. Stone, Brian Van Winkle, Nickolas E. Zeibig-Kichas
ABSTRACT Fire is a critical ecosystem process that has played a key role in shaping forests throughout the Beartooth Mountains in northwestern Wyoming. The highly variable topography of the area provides ideal conditions to compare fire regimes across contiguous forest types, yet pyro-dendrochronological research in this area is limited. We reconstructed fire frequency, tree age structure, and post-fire
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INCREMENT CORING INDUCED TRAUMATIC RESIN DUCTS IN WHITE SPRUCE BUT NOT IN LODGEPOLE PINE Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Jennifer G. Klutsch, Chen X. Kee, Eduardo P. Cappa, Blaise Ratcliffe, Barb R. Thomas, Nadir Erbilgin
ABSTRACT Injury from sampling increment cores may induce defense responses in trees, which may vary between species and reflect differing defense allocation strategies against attack by insects and pathogens. We recorded presence of systemic induction of traumatic resin ducts from early-season increment coring in mature white spruce (Picea glauca) and lodgepole pine (Pinus contorta var. latifolia)
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EDGE EFFECTS MODIFY THE GROWTH DYNAMICS AND CLIMATE SENSITIVITY OF ARAUCARIA ANGUSTIFOLIA TREES Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Alci Albiero-Júnior, Alejandro Venegas-González, Milagros Rodríguez-Catón, Juliano Morales Oliveira, Tomaz Longhi-Santos, Franklin Galvão, Livia Godinho Temponi, Paulo Cesar Botosso
ABSTRACT Edge effects are a major cause of natural dynamics of fragmented forests; however, studies that evaluate edge effects during the lifetime of trees are relatively rare. Through a long-term perspective of tree growth, dendroecology can contribute to a better understanding of the influence of edge effects. In order to frame our interpretation, we raised the following hypotheses: (1) trees located
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A DENDROECOLOGICAL FIRE HISTORY FOR CENTRAL CORSICA/FRANCE Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Sonja Szymczak, Achim Bräuning, Martin Häusser, Emilie Garel, Frédéric Huneau, Sébastien Santoni
ABSTRACT Forest fires are an important factor shaping Mediterranean ecosystems and determine the distribution of different species. Information about past forest fires can be obtained with pyrodendroecology. Here, we present a fire history for three sites in the mountain forest belt on the island of Corsica in the Mediterranean Basin. The dating of scars from cores, stem discs, and wedges from 101
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Wallace (“Wally”) S. Broecker 1931–2019 Tree Ring Res. (IF 1.6) Pub Date : 2020-01-21 Steven W. Leavitt
World-renowned geochemist Wallace “Wally” Broecker, 87, died on February 18, 2019. Wally was born November 29, 1931, in Chicago, Illinois, and later attendedWheaton College and then Columbia University for his graduate work and Ph.D. He was Newberry Professor in the Department of Earth and Environmental Sciences at Columbia University, a scientist at Columbia’s Lamont-Doherty Earth Observatory (LDEO)
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Finding Methuselah: New Light on an Old Story Tree Ring Res. (IF 1.6) Pub Date : 2019-12-08 Daniel W. Pritchett
Edmund Schulman is rightly honored for quantifying the age of bristlecone pines and discovering individuals significantly older than giant sequoias (Sequoiadendron gigantea), previously thought to be the oldest living things. However, George Engelmann inferred the potential for great age in his description of bristlecone pine (Pinus aristata) almost a century before, in 1863. Staff from Inyo National
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METEOROLOGICAL FACTORS ASSOCIATED WITH FROST RINGS IN ROCKY MOUNTAIN BRISTLECONE PINE AT MT. GOLIATH, COLORADO Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Ana Carolina Barbosa, David W. Stahle, Dorian J. Burnette, Max C. A. Torbenson, Edward R. Cook, Matthew J. Bunkers, Gregg Garfin, Ricardo Villalba
ABSTRACT The meteorological factors involved in the formation of earlywood frost rings in Rocky Mountain bristlecone pine (Pinus aristata) have not been described in detail. This study used 51 tree-ring dated Rocky Mountain bristlecone pine trees growing at ca. 3500 m a.s.l. on Mt. Goliath, Colorado, to develop earlywood and latewood frost ring chronologies dating from 1930 to 2010 for investigation
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TOWARDS A MORE ECOLOGICAL DENDROECOLOGY Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Rubén D. Manzanedo, Neil Pederson
ABSTRACT The use of tree-ring methods to study ecological processes, known as dendroecology, has been booming over the last decade. We believe that the incredible methodological strides in this subdiscipline over the last half century will be further advanced by purposefully integrating with other ecological subdisciplines and broadening the scope of dendroecology both in terms of methods and theory
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In MemoriamHarold Clark Fritts 1928–2019 Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Steven W. Leavitt, Edward R. Cook, Malcolm K. Hughes
Harold C. Fritts [known to many as “Hal”] passed away at his home in Tucson, Arizona, on January 10, 2019, at the age of 90. Hal was born December 17, 1928, in Rochester, New York, and was raised in the town of Pittsford where he developed a growing interest in nature. He attended Pittsford High School where he graduated as class salutatorian in 1947. Hal then enrolled at Oberlin College in Ohio where
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A 307-YEAR TREE-RING SPEI RECONSTRUCTION INDICATES MODERN DROUGHT IN WESTERN NEPAL HIMALAYAS Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Sanjaya Bhandari, Narayan Prasad Gaire, Santosh K. Shah, James H. Speer, Dinesh Raj Bhuju, Uday Kunwar Thapa
ABSTRACT Western Nepal has experienced a severe drought in the past two decades, but observation records across Nepal are too short to place the recent drought in a longer context to understand the full range of natural variability in the climate system. In the present study we have collected tree core samples of Tsuga dumosa from two sites, Chhetti and Ranghadi, in the Api Nampa Conservation Area
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FIRE HISTORY OF AN OLD-GROWTH PONDEROSA PINE STAND IN THE SHEEP RANGE, DESERT NATIONAL WILDLIFE REFUGE, NEVADA, USA Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Mackenzie Kilpatrick, James Roberts, Franco Biondi
ABSTRACT Southwestern ponderosa pine forests have experienced reduced fire frequency since Euro-American settlement generally because of successful fire suppression policies. We report here on the fire history of a ponderosa pine stand located in the Sheep Range, which is part of the Desert National Wildlife Refuge, in the Mojave Desert. A total of 22 dominant, fire-scarred ponderosa pines were sampled
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IDENTIFYING AND QUANTIFYING TREE-RING CHRONOLOGY VARIANCE ARTEFACTS RELATED TO CO-OCCURRING CHANGES IN GROWTH RATE Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Anthony M. Fowler, Gretel Boswijk, Andrew Lorrey
ABSTRACT Expectations that a warming world will be associated with more hydro-climatological extremes has motivated research exploring if an associated signal is evident in paleoclimate archives. Tree-ring chronologies are central to this work because of their high temporal resolution, but they are also potentially compromised by variance artefacts associated with the evolving composition of the chronology
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DENDRO-EDUCATION REPORTTREE-RING EXPEDITIONS (TREX): ONLINE LABS THAT GUIDE UNDERGRADS TO THINK LIKE SCIENTISTS Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Nicole Davi, Patrick Pringle, Jeff Lockwood, Francesco Fiondella, Rose Oelkers
ABSTRACT Here we describe five publicly available online labs, geared to undergraduate students, which focus on foundational tree-ring research. Students are introduced to basic dendrochronological concepts and practices (Lab 1) while learning about research that has implications for human well-being. Students learn about the way scientists use tree-ring records to reconstruct drought in the Hudson
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SEASONAL PRECIPITATION SIGNAL IN EARLYWOOD AND LATEWOOD RING WIDTH CHRONOLOGIES OF PINUS ROXBURGHII Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 A. Nautiyal, G. S. Rawat, K. Ramesh, R. Kannan, S. L. Stephenson
ABSTRACT The growth response of earlywood and latewood to precipitation in chir pine (Pinus roxburghii) was studied by examining a series of core samples from the Garhwal Himalaya, India. Earlywood and latewood were observed to contribute about equal proportions towards the total ring width. Comparison of tree-ring data with the CRU TS3.22 (land) precipitation dataset indicates that earlywood is positively
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TWO RECONSTRUCTIONS OF AUGUST–JULY PRECIPITATION FOR CENTRAL NORTHERN ARIZONA FROM TREE RINGS Tree Ring Res. (IF 1.6) Pub Date : 2019-08-07 Tamara Fletcher, Ramzi Touchan, Kai Lepley, Nesrine Rouini, Robert Bloye, Thomas S. Tremarelli, Kelly Peña, David M. Meko
ABSTRACT This study reports two multi-century regional reconstructions of annual precipitation based on Pinus ponderosa and P. edulis from four sites in central northern Arizona. It compares standard regional and time-nested methods to generate reconstructions from 1581–2016 C.E. and 1529–2016 C.E., respectively. The strongest climate relationship is a positive correlation between total ring width
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NITROGEN CAN LIMIT OVERSTORY TREE GROWTH FOLLOWING EXTREME STAND DENSITY INCREASE IN A PONDEROSA PINE FOREST Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 L.A. Marshall, Donald A. Falk, Nate G. Mcdowell
ABSTRACT Extreme stand density increases have occurred in ponderosa pine forests throughout the western U.S. since the early 20th Century, with adverse implications for growth, physiological functioning, and mortality risk. Identifying primary stressors on large, old overstory trees in dense forests can inform management decisions to promote resilience and survival. We tested the impact of stand density
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NO SIGNIFICANT INCREASE IN TREE MORTALITY FOLLOWING CORING IN A TEMPERATE HARDWOOD FOREST Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Ryan Helcoski, Alan J. Tepley, Jennifer C. Mcgarvey, Erika Gonzalez-Akre, Victoria Meakem, Jonathan R. Thompson, Kristina J. Anderson-Teixeira
ABSTRACT The collection of tree-ring data from living trees is widespread and highly valuable in ecological and dendro-climatological research, yet there is concern that coring injures trees, potentially contributing to mortality. Unlike resinous conifers that can quickly compartmentalize wounds, less decay-resistant angiosperms may face more pronounced risk of injury from coring. To test if coring
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DATING THE METHUSELAH WALK BRISTLECONE PINE FLOATING CHRONOLOGIES Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Matthew W. Salzer, Charlotte L. Pearson, Christopher H. Baisan
ABSTRACT Two floating, ring-width chronologies predate the long bristlecone pine (Pinus longaeva) absolutely-dated, ring-width chronology from the Methuselah Walk (MWK) site in the White Mountains of California. The two non-overlapping floating chronologies were derived from samples that crossdate internally but are temporally unconnected to each other and to the nearly 9000-year, ring-width sequence
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SAPWOOD RINGS ESTIMATION FOR PINUS SYLVESTRIS L. IN LITHUANIA AND LATVIA Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Adomas Vitas, Māris Zunde
ABSTRACT Pinus sylvestris L. is the predominant tree species used for wooden constructions in the Baltic area. Accordingly, the timber of Pinus is the most important object for investigation and dating carried out by dendrochronologists of the Baltic countries. However, the dating of historical Pinus is often challenging when the outer sapwood rings are missing in the wood samples. In Pinus, sapwood
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UTILITY OF HERBACEOUS ANNUAL RINGS AS MARKERS OF PLANT RESPONSE TO DISTURBANCE: A CASE STUDY USING ROOTS OF A COMMON MILKWEED SPECIES OF THE US TALLGRASS PRAIRIE Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Justin R. Dee, Michael W. Palmer
ABSTRACT Herb-chronology, the study of annual growth rings in the root to shoot transitional zone of perennial forbs, involves efforts mostly devoted to finding correlations between growth increment and annual climate. The potential of using growth rings as markers of plant growth response to more ecological phenomena such as periodic disturbance still remains mostly untapped. By monitoring the 2016
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CLIMATE-GROWTH RESPONSES FROM PINUS PONDEROSA TREES USING MULTIPLE MEASURES OF ANNUAL RADIAL GROWTH Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Peter T. Soulé, Justin T. Maxwell, Paul A. Knapp
ABSTRACT When using old-growth trees from semiarid, open-canopy environments, basal area increment (BAI), an absolute measure of radial growth, is sometimes used instead of the more commonly used ‘conservative techniques’ (negative exponential or linear regression with a negative slope; NegX) because narrow rings have been shown to potentially bias results. In this study we explore the relationship
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IDENTIFYING OLD TREES TO INFORM ECOLOGICAL RESTORATION IN MONTANE FORESTS OF THE CENTRAL ROCKY MOUNTAINS, USA Tree Ring Res. (IF 1.6) Pub Date : 2019-03-01 Peter M. Brown, Benjamin Gannon, Mike A. Battaglia, Paula J. Fornwalt, Laurie S. Huckaby, Antony S. Cheng, L. Scott Baggett
ABSTRACT Old trees (defined here as ≥150 years old) can be rare in many forests because of past timber harvest, uncharacteristically severe wildfires, and – increasingly – climate change. Old trees provide unique structural, ecological, scientific, and aesthetic values missing in forests containing only younger trees. Here we compile crossdated ages from over 10,000 living and dead trees sampled in
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Tree-Ring Carbon Isotope Records from the Western Oregon Cascade Mountains Primarily Record Summer Maximum Temperatures Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 Christopher J. Ratcliff, Steven L. Voelker, Anne W. Nolin
Abstract Here we examine climatic influences on inter-annual variation in latewood tree growth (i.e. ring-width indices, RWILW) and stable-carbon isotope discrimination (Δ13CLW) from 1950 to 2013 at two SNOTEL snowpack monitoring sites in the Oregon Cascade Mountains. Douglas-fir and mountain hemlock trees were sampled at the lower and upper elevation sites where annual peak snow water equivalent (SWE)
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The Climate Response of Cedrela Fissilis Annual Ring Width in the Rio São Francisco Basin, Brazil Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 Gabriel de Assis Pereira, Ana Carolina Maioli Campos Barbosa, Max Carl Arne Torbenson, David William Stahle, Daniela Granato-Souza, Rubens Manoel Dos Santos, João Paulo Delfino Barbosa
Abstract The São Francisco River basin is one of the most drought-prone regions of Brazil. Seasonally dry tropical forests (SDTF) are widely distributed in the basin and we developed a short chronology of Cedrela fissilis annual ring widths from SDTF fragments based on 89 cores from 44 trees dating from 1961 to 2015. The average correlation among all radii (RBAR) is 0.52. The tree-ring chronology is
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Dendrogeomorphological Evidence of Flood Frequency Changes and Human Activities (Portainé Basin, Spanish Pyrenees) Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 M. Génova, A. Díez-Herrero, G. Furdada, M. Guinau, A. Victoriano
Abstract The Portainé mountain catchment, containing the Port Ainé ski resort (Lleida, Spanish Pyrenees), displays active erosional and depositional phenomena caused by periodic torrential floods. These events present a potential risk and incur significant economic losses. In ungauged remote catchments (like Portainé), trees might be the only paleohydrological source of information regarding past floods
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Climatic Drivers of Ponderosa Pine Growth in Central Idaho Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 Joseph L. Pettit, R. Justin Derose, James N. Long
Abstract Despite the widespread use of ponderosa pine as an important hydroclimate proxy, we actually understand very little about its climate response in the Northern Rockies. Here, we analyze two new ponderosa pine chronologies to investigate how climate influences annual growth. Despite differences in precipitation amount and timing and large elevation differences (1820 m versus 1060 m), ring width
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Dendroecological Approach to Assessing Carbon Accumulation Dynamics in Two Pinus Species from Northern Mexico Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 Marín Pompa-García, Alejandro Venegas-GonzáLez, Alci Albiero Júnior, José A. Sigala-Rodríguez
Abstract Global climate change will alter forests by shifting species ranges, which has implications for their ecological functions. Annual tree-ring widths and wood density are useful proxies for carbon cycle studies across a range of species. Here, using a dendroecological approach we sought to understand the carbon accumulation rates of two representative pine species growing on contrasting wet
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Determination of Death Dates of Coarse Woody Debris of Multiple Species in the Central Hardwood Region (Indiana, USA) Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 M. Ross Alexander, Christine R. Rollinson, David J. P. Moore, James H. Speer, Darrin L. Rubino
Abstract Coarse woody debris (CWD; i.e. downed limbs and boles) serves numerous ecosystem functions, which vary according to the degree of decay. CWD decay is often described using five categories based on readily observed physical characteristics ranging from freshly fallen (Class I) to advanced decay with little structural integrity (Class V). Though useful in categorizing downed wood in a forest
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A Machine Learning Approach to Analyzing the Relationship Between Temperatures and Multi-Proxy Tree-Ring Records Tree Ring Res. (IF 1.6) Pub Date : 2018-07-01 Jernej Jevšenak, Sašo Džeroski, Saša Zavadlav, Tom Levanič
Abstract Machine learning (ML) is a widely unexplored field in dendroclimatology, but it is a powerful tool that might improve the accuracy of climate reconstructions. In this paper, different ML algorithms are compared to climate reconstruction from tree-ring proxies. The algorithms considered are multiple linear regression (MLR), artificial neural networks (ANN), model trees (MT), bagging of model
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Climate Signal in Cork-Ring Chronologies: Case Studies in Southwestern Portugal and Northwestern Algeria Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Amina Ghalem, Inês Barbosa, Rachid Tarik Bouhraoua, Augusta Costa
Abstract In temperate regions, the analysis of climate signals encoded in the wood rings allows assessing tree sensitivity to climate and its potential effects on growth and yield. In Mediterranean regions, the cork oak (Quercus suber L.) has received limited attention for dendrochronological studies because tree rings are faint and cork rings with a clear annual banding have been rather neglected
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The First Dendrochronological Dating of Timber from Tajikistan – Potential for Developing a Millennial Tree-Ring Record Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Magdalena Opała-Owczarek, Piotr Owczarek, Oimahmad Rahmonov, Tadeusz Niedźwiedź
Abstract We are reporting the first dendrochronological dating of timber from Tajikistan. Thirty samples were collected from two old buildings from a village located in the western Pamir-Alay; eight cores were taken from temple. Most of the construction wood was juniper species. The object chronologies crossdated well with the previously published chronology based on living juniper trees from western
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Sensitivity of Three Dominant Tree Species from the Upper Boundary of Their Forest Type to Climate Change at Changbai Mountain, Northeastern China Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Lushuang Gao, Yun Zhang, Xiaoming Wang, Chunyu Zhang, Yihan Zhao, Lanmei Liu
Abstract We quantified the growth dynamics and climatic responses of three tree species that have dominated Changbai Mountain: Korean pine (Pinus koraiensis), Yeddo spruce (Picea jezoensis), and Erman's birch (Betula ermanii). Standardization curves and moving correlations were used to assess growth rate trends and analyze changes in growth-climate relationships of trees at their upper forest boundaries
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Tree-Ring Research of Mexican Beech (Fagus Grandifolia Subsp. Mexicana) A Relict Tree Endemic to Eastern Mexico Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Ernesto Chanes Rodríguez-Ramírez, Isolda Luna-Vega, Vicente Rozas
Abstract Mexican beech (Fagus grandifolia subsp. mexicana) has been classified as an endangered species because of its restricted distribution. The current distribution of Mexican beech, which is considered a Miocene relict, is limited to Tropical Montane Cloud Forests (TMCF) in the mountains of the Sierra Madre Oriental in eastern Mexico. We used dendroclimatic techniques to evaluate the effects of
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Growth-Ring Boundary Anatomy and Dendrochronological Potential in a Moist Tropical Forest in Northeastern Bangladesh Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Mahmuda Islam, Mizanur Rahman, Achim Bräuning
Abstract We present the microscopic analysis of growth-ring boundary anatomy of 27 tree species from a moist tropical forest in Bangladesh and evaluate their dendrochronological potential. We observed high inter-species variability in the anatomical features that define growth-ring boundaries. Marginal parenchyma, fibre zones, and thick-walled latewood fibres were identified as the dominant anatomical
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South American Dendroecological Fieldweek 2016: Exploring Dendrochronological Research in Northern Patagonia Tree Ring Res. (IF 1.6) Pub Date : 2018-01-01 Mariano M. Amoroso, James H. Speer, Lori D. Daniels, Ricardo Villalba, Edward Cook, David Stahle, Ana Srur, Jacques Tardif, France Conciatori, Eugenia Aciar, Julieta Arco, Anabela Bonada, Bethany Coulthard, Jennifer Haney, Miriam Isaac-Renton, Juliana Magalhães, Eugenia Marcotti, Pablo Meglioli, María Sol Montepeluso, Rose Oelkers, Jessie Pearl, Marin Pompa Garcia, Johanna Robson, Milagros Rodriguez
Abstract The South American Dendroecological Fieldweek (SADEF) associated with the Third American Dendrochronology Conference was held in El Bolsón, Argentina, in March 2016. The main objective of the SADEF was to teach the basics of dendrochronology while applying specific knowledge to selected research questions. The course included participants and instructors from six different countries. This