Pub Date : 2017-08-22DOI: 10.3959/1536-1098-73.2.126
J. Susperregi, E. Jansma
Abstract Dendroarchaeology in the Basque country is directed at improving our understanding of the cultural heritage preserved in, or originating from, northwestern Spain. To this end the emphasis is on the compilation of absolutely-dated tree-ring chronologies that can serve as a reference for accurately dating ancient structures such as buildings and shipwrecks. The current study focuses on 41 samples from radially-split oak planks that were mostly stored for reuse in a carpentry workshop in this region. The general consensus among historians is that these planks, and hence the buildings they are part of, date from the 15th and 16th Centuries. Our results show that the trees from which the planks were derived were cut down in the 15th to 19th Centuries, thus refuting this narrow time frame. The similarity of the planks’ growth patterns to the annual variations of Basque chronology ARAB4 (AD 1277–1819), which we reworked slightly and renamed ARAB8, confirms that this chronology is well-suited for establishing the age of timbers preserved in the cultural heritage in this region. The inclusion of the new series into ARAB8 significantly improves the replication of this master chronology from ca. AD 1300 onwards and extends it forward to AD 1849. Résumé La dendrochronologie dans le pays Basque vise à améliorer notre compréhension du patrimoine culturel régional ou originaire du nord-ouest de l'Espagne. L'objectif est de rassembler des séries dendrochronologiques datées de manière absolue qui pourront servir de référentiels pour la datation de structures anciennes telles que les bâtiments et les épaves de bateaux. L'étude présentée ici porte sur 41 échantillons de chêne dérivés de planches fendues dans le sens radial, dont la plupart ont été stockés pour être réutilisées dans un atelier de charpenterie de cette région. Il est admis, d'après les historiens, que ces planches, et donc les bâtiments dont ils faisaient partie, datent des XVe et XVIe siècles. Or, nos résultats montrent que les arbres dont les planches ont été tirées ont été abattus du XVe au XIXe siècle, ce qui élargit considérablement la fourchette chronologique. La similitude entre les variations annuelles des cernes sur les planches et celles de la chronologie basque ARAB4 (AD 1277 à 1819), revue par nos soins et renommée ARAB8, confirme que cette chronologie est bien adaptée pour dater les bois du patrimoine culturel de cette région. L'inclusion des nouvelles séries au sein de la moyenne ARAB8 améliore de manière significative la puissance de la moyenne de cette référence de AD 1300 jusqu’à AD 1849. Resumen La investigación dendrocronológica en el País Vasco está orientada a la profundización en el conocimiento del patrimonio cultural originario de la región y del noroeste de España. Una de las prioridades es la recopilación de series dendrocronológicas datadas de forma absoluta, que puedan servir de referencias para la datación de estructuras antiguas como edificios o restos de barcos
巴斯克地区的树木考古旨在提高我们对西班牙西北部保存或起源于西班牙西北部的文化遗产的理解。为此，重点是编纂绝对年代的树木年轮年表，以作为精确测定建筑物和沉船等古代结构年代的参考。目前的研究集中在41个样本上，这些样本来自径向分裂的橡木板，这些样本大多储存在该地区的木工车间中以供重复使用。历史学家的普遍共识是，这些木板，以及它们所组成的建筑，可以追溯到15世纪和16世纪。我们的研究结果表明，制作木板的树木是在15至19世纪被砍伐的，因此反驳了这个狭窄的时间框架。木板的生长模式与巴斯克年表ARAB4(公元1277年至1819年)的年变化相似，我们稍微修改并更名为ARAB8，证实了这个年表非常适合确定该地区文化遗产中保存的木材的年龄。将新系列纳入ARAB8显着改善了从公元1300年开始的主年表的复制，并将其扩展到公元1849年。r年代学(La dendrochronologie dans le pays Basque)是指西班牙东北地区的传统文化(patrimoine culture)。我的目标是重新组装一个数据交换系统，数据交换系统，数据交换系统，数据交换系统，数据交换系统，数据交换系统，数据交换系统。L' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Il est admis, d' aprires les historens, que ces planches, et dondonles batiments not ils faisaient party, datent des XVe et XVIe si。或者，没有任何一个改过自新的组织，例如，没有改过自新的组织，没有改过自新的组织，没有改过自新的组织，没有改过自新的组织。La similenentre les variations annuelles des cernes sur les planches et celles de La chronologie basque ARAB4 (AD 1277 1819)， revue par nos soins et renomicemobe ARAB8, confirme que ette chronologie est bien adaptsame pour dater les bois du patrimoine culrel de castericemoine。在公元1300年，在公元1849年，新加入的 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -简历La investigación dendrocronológica en el País Vasco estorientada和La profundización en el conconimiento del patrimonio del cultural originario de La región和del noroeste de España。unas优先级为recopilación de series dendrocronológicas绝对形式的数据、数据和参考服务。unas优先级为datación de structuras de structuras de structuras de restres de barcos。El presente estustudio由El análisis de 41个tablas radiales程序组成，extraídas del tronco por inserción de cuñas y rajado a la veta, la mayor partite de las mismas almacenadas por uncarpintero de la región para su re-utilización。La hipótesis desarrollada穷人的历史学家sitúa La utilización de esta tancinica (y porporto los edificios que continenen este tipo de tablas) en los siglos十五至十六。在禁运期间，联合国的结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果是，联合国的调查结果。La similuud entre los patronones de las tablas通过las variaciones annuales de La cronología ARAB4 (1277-1819)， que ha sido revisada y re-nombrada como ARAB8, confirma La idoneidad de esta cronología para La datación de elements en madera del patrimonio cultural de La región。La inclusión de nuevas series en La cronología ARAB8 ha suputo una mejora significant en su replicación desde el año 1300 en adelante y su extensión hasta el año 1849。
{"title":"Towards A Better Chronology of Basque Heritage Using Time-Series from Renovation Waste","authors":"J. Susperregi, E. Jansma","doi":"10.3959/1536-1098-73.2.126","DOIUrl":"https://doi.org/10.3959/1536-1098-73.2.126","url":null,"abstract":"Abstract Dendroarchaeology in the Basque country is directed at improving our understanding of the cultural heritage preserved in, or originating from, northwestern Spain. To this end the emphasis is on the compilation of absolutely-dated tree-ring chronologies that can serve as a reference for accurately dating ancient structures such as buildings and shipwrecks. The current study focuses on 41 samples from radially-split oak planks that were mostly stored for reuse in a carpentry workshop in this region. The general consensus among historians is that these planks, and hence the buildings they are part of, date from the 15th and 16th Centuries. Our results show that the trees from which the planks were derived were cut down in the 15th to 19th Centuries, thus refuting this narrow time frame. The similarity of the planks’ growth patterns to the annual variations of Basque chronology ARAB4 (AD 1277–1819), which we reworked slightly and renamed ARAB8, confirms that this chronology is well-suited for establishing the age of timbers preserved in the cultural heritage in this region. The inclusion of the new series into ARAB8 significantly improves the replication of this master chronology from ca. AD 1300 onwards and extends it forward to AD 1849. Résumé La dendrochronologie dans le pays Basque vise à améliorer notre compréhension du patrimoine culturel régional ou originaire du nord-ouest de l'Espagne. L'objectif est de rassembler des séries dendrochronologiques datées de manière absolue qui pourront servir de référentiels pour la datation de structures anciennes telles que les bâtiments et les épaves de bateaux. L'étude présentée ici porte sur 41 échantillons de chêne dérivés de planches fendues dans le sens radial, dont la plupart ont été stockés pour être réutilisées dans un atelier de charpenterie de cette région. Il est admis, d'après les historiens, que ces planches, et donc les bâtiments dont ils faisaient partie, datent des XVe et XVIe siècles. Or, nos résultats montrent que les arbres dont les planches ont été tirées ont été abattus du XVe au XIXe siècle, ce qui élargit considérablement la fourchette chronologique. La similitude entre les variations annuelles des cernes sur les planches et celles de la chronologie basque ARAB4 (AD 1277 à 1819), revue par nos soins et renommée ARAB8, confirme que cette chronologie est bien adaptée pour dater les bois du patrimoine culturel de cette région. L'inclusion des nouvelles séries au sein de la moyenne ARAB8 améliore de manière significative la puissance de la moyenne de cette référence de AD 1300 jusqu’à AD 1849. Resumen La investigación dendrocronológica en el País Vasco está orientada a la profundización en el conocimiento del patrimonio cultural originario de la región y del noroeste de España. Una de las prioridades es la recopilación de series dendrocronológicas datadas de forma absoluta, que puedan servir de referencias para la datación de estructuras antiguas como edificios o restos de barcos","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"126 - 135"},"PeriodicalIF":1.6,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.2.126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44201313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.24
V. Angers, Y. Bergeron, P. Drapeau
ABSTRACT In trees experiencing stress prior to death, growth may be partially or totally suppressed, or may occur only in the upper part of the boles. This may induce inaccuracies when retrospectively crossdating dead trees. In this study, we investigated the occurrence and range of time lags between year of last ring production (YOLRP) in crossdated discs collected at the base, at breast height (BrH), and in the upper part (UP) of the boles of 145 snags and logs of four boreal species. We also assessed the influence of tree age and growth prior to death. When comparing YOLRP in the upper and lower part of trees, more than half the time lags departed from zero. Mean lags ranged from 0.6 to 4.6 years according to species, with lags up to 14 years. Negative time lags, i.e. ring production occurring in the lower part of boles while it has stopped in the upper part, were also observed in up to 26% of cases. We suggest that when reconstructing fine patterns of mortality where accuracy must be optimized, sampling entire discs at BrH should be considered, as well as sampling a disc in the UP when sampling old or slowly declining trees.
{"title":"Crossdating Dead Trees: Does Sampling Height Influence Results?","authors":"V. Angers, Y. Bergeron, P. Drapeau","doi":"10.3959/1536-1098-73.1.24","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.24","url":null,"abstract":"ABSTRACT In trees experiencing stress prior to death, growth may be partially or totally suppressed, or may occur only in the upper part of the boles. This may induce inaccuracies when retrospectively crossdating dead trees. In this study, we investigated the occurrence and range of time lags between year of last ring production (YOLRP) in crossdated discs collected at the base, at breast height (BrH), and in the upper part (UP) of the boles of 145 snags and logs of four boreal species. We also assessed the influence of tree age and growth prior to death. When comparing YOLRP in the upper and lower part of trees, more than half the time lags departed from zero. Mean lags ranged from 0.6 to 4.6 years according to species, with lags up to 14 years. Negative time lags, i.e. ring production occurring in the lower part of boles while it has stopped in the upper part, were also observed in up to 26% of cases. We suggest that when reconstructing fine patterns of mortality where accuracy must be optimized, sampling entire discs at BrH should be considered, as well as sampling a disc in the UP when sampling old or slowly declining trees.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"24 - 34"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.24","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43506901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.47
Ondrej Prokop, T. Kolář, T. Kyncl, M. Rybníček
ABSTRACT In recent years, a millennia-long oak tree-ring width chronology, consisting of 3194 samples from 387 locations, was developed in the Czech Republic. Despite the collection of such a huge dataset, the replication in the 19th Century was very low and the natural oak distribution in the Czech Republic was insufficiently covered by recent samples, especially in Western Bohemia. This study aimed to remove these weaknesses, which have limited the paleoclimatic potential of this dataset, and to determine the number of sapwood rings, which is crucial for dendrochronological dating. Therefore, new recent samples were randomly collected at numerous sawmills along the Czech-German border. The historical material was usually sampled using a Pressler borer from church belfry constructions traditionally made from oak. In total, 252 recent and 90 historical tree-ring width series were incorporated into the chronology. The newly built chronology cumulatively consists of 3536 series, which covers the continuous period of A.D. 352–2014. The resulting tree-ring width record shows robust signal strength and homogeneous coverage of the territory. We show that the number of sapwood rings is constant over time. Therefore, we recommend using an estimate of 5–24 sapwood rings for a more precise dating of historical wood findings in the Czech Republic.
{"title":"Updating the Czech Millennia-Long Oak Tree-Ring Width Chronology","authors":"Ondrej Prokop, T. Kolář, T. Kyncl, M. Rybníček","doi":"10.3959/1536-1098-73.1.47","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.47","url":null,"abstract":"ABSTRACT In recent years, a millennia-long oak tree-ring width chronology, consisting of 3194 samples from 387 locations, was developed in the Czech Republic. Despite the collection of such a huge dataset, the replication in the 19th Century was very low and the natural oak distribution in the Czech Republic was insufficiently covered by recent samples, especially in Western Bohemia. This study aimed to remove these weaknesses, which have limited the paleoclimatic potential of this dataset, and to determine the number of sapwood rings, which is crucial for dendrochronological dating. Therefore, new recent samples were randomly collected at numerous sawmills along the Czech-German border. The historical material was usually sampled using a Pressler borer from church belfry constructions traditionally made from oak. In total, 252 recent and 90 historical tree-ring width series were incorporated into the chronology. The newly built chronology cumulatively consists of 3536 series, which covers the continuous period of A.D. 352–2014. The resulting tree-ring width record shows robust signal strength and homogeneous coverage of the territory. We show that the number of sapwood rings is constant over time. Therefore, we recommend using an estimate of 5–24 sapwood rings for a more precise dating of historical wood findings in the Czech Republic.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"47 - 52"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.47","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47128587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.11
Thomas Wilding, C. Woodhouse
ABSTRACT This paper documents a pilot study investigating the potential use of pinyon pine (Pinus monophylla Torr. & Frem) growing in the White Mountains of eastern California for climate reconstructions. The single-leaf pinyon pine from this study exhibit a significant and stable relationship with annual (August–July) precipitation over the instrumental record (r = 0.69). This relationship is stronger than that of the lower forest border bristlecone pine (Pinus longaeva) growing nearby. Spatially, the climate-growth relationship remains strong beyond this localized region, extending over Southern California. Although pinyon pine is not as long lived as the bristlecone pine, these results indicate that the strength of the climate-growth relationship makes this species valuable in developing climate reconstructions in the future. Additionally, the presence of persistent remnant wood at all sampling sites offers an opportunity to extend pinyon records further back in time. Furthermore, the close proximity of pinyon pine to bristlecone pine at these sites presents the possibility of developing multi-species reconstructions using both species.
{"title":"Assessing the Potential of Pinyon Pine for Climate Reconstructions in Eastern California","authors":"Thomas Wilding, C. Woodhouse","doi":"10.3959/1536-1098-73.1.11","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.11","url":null,"abstract":"ABSTRACT This paper documents a pilot study investigating the potential use of pinyon pine (Pinus monophylla Torr. & Frem) growing in the White Mountains of eastern California for climate reconstructions. The single-leaf pinyon pine from this study exhibit a significant and stable relationship with annual (August–July) precipitation over the instrumental record (r = 0.69). This relationship is stronger than that of the lower forest border bristlecone pine (Pinus longaeva) growing nearby. Spatially, the climate-growth relationship remains strong beyond this localized region, extending over Southern California. Although pinyon pine is not as long lived as the bristlecone pine, these results indicate that the strength of the climate-growth relationship makes this species valuable in developing climate reconstructions in the future. Additionally, the presence of persistent remnant wood at all sampling sites offers an opportunity to extend pinyon records further back in time. Furthermore, the close proximity of pinyon pine to bristlecone pine at these sites presents the possibility of developing multi-species reconstructions using both species.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"11 - 23"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.11","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43553594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.42
J. Huffman, Monica T. Rother
ABSTRACT Few tree-ring based fire-history studies have been completed in pine ecosystems of the Southeastern Coastal Plain, in part because of difficulties in finding old fire-scarred material. We propose specialized field methods that improve the likelihood of locating fire scars in dead trees (i.e. stumps, snags, and logs). Classic fire-history field methods developed in the southwestern United States involve targeting only trees with evidence of repeated external scarring, but we have found this approach to be less effective in our region given that trees without any external scarring may contain an abundance of buried scars. The buried scars occur primarily near the ground surface and can be sampled by collecting full cross-sections from the bases of old dead trees. We hope our insights foster further fire-history research in the Southeastern Coastal Plain.
{"title":"Dendrochronological Field Methods for Fire History in Pine Ecosystems of the Southeastern Coastal Plain","authors":"J. Huffman, Monica T. Rother","doi":"10.3959/1536-1098-73.1.42","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.42","url":null,"abstract":"ABSTRACT Few tree-ring based fire-history studies have been completed in pine ecosystems of the Southeastern Coastal Plain, in part because of difficulties in finding old fire-scarred material. We propose specialized field methods that improve the likelihood of locating fire scars in dead trees (i.e. stumps, snags, and logs). Classic fire-history field methods developed in the southwestern United States involve targeting only trees with evidence of repeated external scarring, but we have found this approach to be less effective in our region given that trees without any external scarring may contain an abundance of buried scars. The buried scars occur primarily near the ground surface and can be sampled by collecting full cross-sections from the bases of old dead trees. We hope our insights foster further fire-history research in the Southeastern Coastal Plain.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"42 - 46"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.42","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49193346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.53
I. Aguilera-Betti, A. Muñoz, D. Stahle, Gino Figueroa, Fernando Duarte, Á. González-Reyes, D. Christie, A. Lara, Mauro E. González, P. Sheppard, D. Sauchyn, Andrés Moreira-Muñoz, Isadora Toledo-Guerrero, Matías Olea, Pablo Apaz, Alfonso Fernández
ISABELLA AGUILERA-BETTI1*, ARIEL A. MUÑOZ1, DANIEL STAHLE2, GINO FIGUEROA1,3, FERNANDO DUARTE1, ÁLVARO GONZÁLEZ-REYES4,5, DUNCAN CHRISTIE6, ANTONIO LARA6, MAURO E. GONZÁLEZ6, PAUL R. SHEPPARD7, DAVID SAUCHYN8, ANDRÉS MOREIRA-MUÑOZ9, ISADORA TOLEDO-GUERRERO1, MATÍAS OLEA1, PABLO APAZ1,10, and ALFONSO FERNANDEZ11 1Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
{"title":"The First Millennium-Age Araucaria Araucana in Patagonia","authors":"I. Aguilera-Betti, A. Muñoz, D. Stahle, Gino Figueroa, Fernando Duarte, Á. González-Reyes, D. Christie, A. Lara, Mauro E. González, P. Sheppard, D. Sauchyn, Andrés Moreira-Muñoz, Isadora Toledo-Guerrero, Matías Olea, Pablo Apaz, Alfonso Fernández","doi":"10.3959/1536-1098-73.1.53","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.53","url":null,"abstract":"ISABELLA AGUILERA-BETTI1*, ARIEL A. MUÑOZ1, DANIEL STAHLE2, GINO FIGUEROA1,3, FERNANDO DUARTE1, ÁLVARO GONZÁLEZ-REYES4,5, DUNCAN CHRISTIE6, ANTONIO LARA6, MAURO E. GONZÁLEZ6, PAUL R. SHEPPARD7, DAVID SAUCHYN8, ANDRÉS MOREIRA-MUÑOZ9, ISADORA TOLEDO-GUERRERO1, MATÍAS OLEA1, PABLO APAZ1,10, and ALFONSO FERNANDEZ11 1Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"53 - 56"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.53","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46658050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.57
P. Sheppard
Paul C. Van Deusen, 62, died on August 21, 2015. Paul was born June 25, 1953, in Allford, Massachusetts. Growing up, Paul enjoyed school, especially math, which became a part of his life’s work. Paul earned a BS degree in forest management from the University of Massachusetts in 1975, a Master’s degree in forest biometrics from Mississippi State University in 1979, and a PhD in forest biometrics from the University of California, Berkeley, in 1984. He also served two years in the Peace Corps in Jamaica, assisting in forestry work with land surveying, inventorying natural forests, and preparing management plans. Paul was a principal research scientist with the National Council for Air and Stream Improvement (NCASI), working with the Statistics and Model Development Group on forest inventory and analysis methods. He also developed and maintained a suite of online tools to facilitate spatially explicit forest-harvest scheduling, visualizing and analyzing forest inventory and analysis (FIA) data, estimating forest carbon, and analyzing wildlife habitat selection. Paul authored many publications on such topics as the design of field methods for forest inventory, methods for analyzing forest inventory data, economic effects of constraints on forest
Paul C.Van Deusen，62岁，于2015年8月21日去世。保罗于1953年6月25日出生于马萨诸塞州的奥尔福德。在成长过程中，保罗喜欢上学，尤其是数学，这已成为他一生工作的一部分。Paul于1975年获得马萨诸塞大学森林管理学士学位，1979年获得密西西比州立大学森林生物识别硕士学位，1984年获得加州大学伯克利分校森林生物识别博士学位。他还在牙买加和平队服役两年，协助林业工作，包括土地调查、天然林清查和制定管理计划。Paul是国家空气和溪流改善委员会（NCASI）的首席研究科学家，与统计和模型开发小组合作研究森林清查和分析方法。他还开发并维护了一套在线工具，以促进空间上明确的森林采伐计划、可视化和分析森林库存和分析（FIA）数据、估计森林碳以及分析野生动物栖息地选择。Paul撰写了许多关于森林清查实地方法设计、森林清查数据分析方法、约束对森林的经济影响等主题的出版物
{"title":"Paul C. Van Deusen 1953–2015","authors":"P. Sheppard","doi":"10.3959/1536-1098-73.1.57","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.57","url":null,"abstract":"Paul C. Van Deusen, 62, died on August 21, 2015. Paul was born June 25, 1953, in Allford, Massachusetts. Growing up, Paul enjoyed school, especially math, which became a part of his life’s work. Paul earned a BS degree in forest management from the University of Massachusetts in 1975, a Master’s degree in forest biometrics from Mississippi State University in 1979, and a PhD in forest biometrics from the University of California, Berkeley, in 1984. He also served two years in the Peace Corps in Jamaica, assisting in forestry work with land surveying, inventorying natural forests, and preparing management plans. Paul was a principal research scientist with the National Council for Air and Stream Improvement (NCASI), working with the Statistics and Model Development Group on forest inventory and analysis methods. He also developed and maintained a suite of online tools to facilitate spatially explicit forest-harvest scheduling, visualizing and analyzing forest inventory and analysis (FIA) data, estimating forest carbon, and analyzing wildlife habitat selection. Paul authored many publications on such topics as the design of field methods for forest inventory, methods for analyzing forest inventory data, economic effects of constraints on forest","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"57 - 58"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49667684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.1
C. Nie, Qibin Zhang, Lixin Lyu
ABSTRACT Millennium-aged trees are rare in natural forests. Here we present an 1184-year-long tree-ring width chronology from living juniper trees in the Biru area on the southeastern Tibetan Plateau. Growth-climate response analysis shows that the Biru chronology is significantly and positively correlated with late-spring (May-June) Standardized Precipitation Evaporation Index (SPEI) (r = 0.67, n = 53, p < 0.01). The tree-ring chronology explains 44.5% of the total variance of SPEI during the period AD 1957–2010. Reconstruction of May-June SPEI shows that there was a two-century-long megadrought during the late 13th to late 15th Centuries, and a seven-decade-long megadrought during AD 1630s to 1690s. Comparisons with other moisture records in the region suggest that the two-century megadrought identified in our reconstruction might be a widespread phenomenon most likely reflecting a stage of reduced Southwest Asian Summer Monsoon. Our results provide new evidence on the megadrought events on the Tibetan Plateau for the last millennium.
{"title":"Millennium-Long Tree-Ring Chronology Reveals Megadroughts on the Southeastern Tibetan Plateau","authors":"C. Nie, Qibin Zhang, Lixin Lyu","doi":"10.3959/1536-1098-73.1.1","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.1","url":null,"abstract":"ABSTRACT Millennium-aged trees are rare in natural forests. Here we present an 1184-year-long tree-ring width chronology from living juniper trees in the Biru area on the southeastern Tibetan Plateau. Growth-climate response analysis shows that the Biru chronology is significantly and positively correlated with late-spring (May-June) Standardized Precipitation Evaporation Index (SPEI) (r = 0.67, n = 53, p < 0.01). The tree-ring chronology explains 44.5% of the total variance of SPEI during the period AD 1957–2010. Reconstruction of May-June SPEI shows that there was a two-century-long megadrought during the late 13th to late 15th Centuries, and a seven-decade-long megadrought during AD 1630s to 1690s. Comparisons with other moisture records in the region suggest that the two-century megadrought identified in our reconstruction might be a widespread phenomenon most likely reflecting a stage of reduced Southwest Asian Summer Monsoon. Our results provide new evidence on the megadrought events on the Tibetan Plateau for the last millennium.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"1 - 10"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46848309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-06DOI: 10.3959/1536-1098-73.1.35
C. A. Copenheaver, Dylan E. Dawson, M. N. Garza, Deborah G. Nemens
ABSTRACT Maple syrup is a regional, non-timber forest product in the United States that depends upon healthy, mature sugar maple (Acer saccharum Marshall). We examined whether tapping for maple syrup altered the dendroclimatic response of sugar maple. Ring width indices from two sites (tapped and reference) in central Pennsylvania were correlated with regional temperature, precipitation, and Palmer Drought Severity Index (PDSI). Both sites had significant correlations between summer and fall PDSI and radial growth. Spring PDSI was significantly correlated with growth at the reference site, but not at the tapped site. Both tapped and reference trees experienced below-average growth during years with dry spring conditions (PSDI < 0), but tapped trees had a higher percentage of years (27%) with below-average growth during years with moist spring conditions (PDSI > 0) compared to reference trees (15%). These results indicate that tapping for maple syrup may have altered the dendroclimatic response of sugar maple to moisture availability during the spring months.
{"title":"Dendroclimatic Responses of Sugar Maple Tapped for Maple Syrup: A Case Study from Pennsylvania","authors":"C. A. Copenheaver, Dylan E. Dawson, M. N. Garza, Deborah G. Nemens","doi":"10.3959/1536-1098-73.1.35","DOIUrl":"https://doi.org/10.3959/1536-1098-73.1.35","url":null,"abstract":"ABSTRACT Maple syrup is a regional, non-timber forest product in the United States that depends upon healthy, mature sugar maple (Acer saccharum Marshall). We examined whether tapping for maple syrup altered the dendroclimatic response of sugar maple. Ring width indices from two sites (tapped and reference) in central Pennsylvania were correlated with regional temperature, precipitation, and Palmer Drought Severity Index (PDSI). Both sites had significant correlations between summer and fall PDSI and radial growth. Spring PDSI was significantly correlated with growth at the reference site, but not at the tapped site. Both tapped and reference trees experienced below-average growth during years with dry spring conditions (PSDI < 0), but tapped trees had a higher percentage of years (27%) with below-average growth during years with moist spring conditions (PDSI > 0) compared to reference trees (15%). These results indicate that tapping for maple syrup may have altered the dendroclimatic response of sugar maple to moisture availability during the spring months.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"73 1","pages":"35 - 41"},"PeriodicalIF":1.6,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-73.1.35","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48629088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-01DOI: 10.3959/1536-1098-72.01.23
Marzena Kłusek, Michael Grabner
ABSTRACT The processing of subfossil wood poses some difficulties in densitometric research. Problems arise because of the physiochemical changes of wood occurring in the sedimentation environment. Subfossil wood modification can result from the uptake of mineral and organic substances into the wood tissue. It can also occur as the effect of microbiological degradation of wood. The goal of this study was to identify the appropriate method of subfossil wood preparation for the densitometric research. For this purpose the wood of Norway spruce from Lake Schwarzensee was subjected to extraction in de-ionized water, acetone and diluted acetic acid. The application of acetic acid did not significantly influence the density of the wood and acetone seemed to be too aggressive. The best result was obtained by rinsing the samples in cold de-ionized water. This extraction procedure allowed removal of unwanted water-soluble, organic and inorganic compounds from wood and simultaneously did not lead to the degradation of subfossil samples.
{"title":"X-RAY DENSITOMETRY OF NORWAY SPRUCE SUBFOSSIL WOOD FROM THE AUSTRIAN ALPS.","authors":"Marzena Kłusek, Michael Grabner","doi":"10.3959/1536-1098-72.01.23","DOIUrl":"https://doi.org/10.3959/1536-1098-72.01.23","url":null,"abstract":"ABSTRACT The processing of subfossil wood poses some difficulties in densitometric research. Problems arise because of the physiochemical changes of wood occurring in the sedimentation environment. Subfossil wood modification can result from the uptake of mineral and organic substances into the wood tissue. It can also occur as the effect of microbiological degradation of wood. The goal of this study was to identify the appropriate method of subfossil wood preparation for the densitometric research. For this purpose the wood of Norway spruce from Lake Schwarzensee was subjected to extraction in de-ionized water, acetone and diluted acetic acid. The application of acetic acid did not significantly influence the density of the wood and acetone seemed to be too aggressive. The best result was obtained by rinsing the samples in cold de-ionized water. This extraction procedure allowed removal of unwanted water-soluble, organic and inorganic compounds from wood and simultaneously did not lead to the degradation of subfossil samples.","PeriodicalId":54416,"journal":{"name":"Tree-Ring Research","volume":"72 1","pages":"23-34"},"PeriodicalIF":1.6,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3959/1536-1098-72.01.23","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34380112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：