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Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau

Knowledge about the spatiotemporal tree growth variability and its associations with climate provides key insights into forest dynamics under future scenarios of climate change. We synthesized 17 tree-ring width chronologies from four tree species at the high-elevation sites in the southeast Tibetan...

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Autores principales: Zhou, Feifei, Fang, Keyan, Zhang, Fen, Dong, Zhipeng, Chen, Dan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4892591/
https://www.ncbi.nlm.nih.gov/pubmed/27257971
http://dx.doi.org/10.1371/journal.pone.0156126
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author Zhou, Feifei
Fang, Keyan
Zhang, Fen
Dong, Zhipeng
Chen, Dan
author_facet Zhou, Feifei
Fang, Keyan
Zhang, Fen
Dong, Zhipeng
Chen, Dan
author_sort Zhou, Feifei
collection PubMed
description Knowledge about the spatiotemporal tree growth variability and its associations with climate provides key insights into forest dynamics under future scenarios of climate change. We synthesized 17 tree-ring width chronologies from four tree species at the high-elevation sites in the southeast Tibetan Plateau (SETP) to study the regional tree growth variability and climate-growth relationships. Despite of diverse habitats and different physiological characteristics of these species, these tree-ring chronologies shared a significant common variance in SETP. An unprecedented increase in the shared variance is found along the latter half of the 20th century, coinciding with the enhancement of the frequency of extreme rings among chronologies. It is found that minimum winter temperature tends to be the dominant climate for trees in this region. The site-specific responses in cold (1965–1980) and warm (1990–2005) intervals by means of Fuzzy Cmeans (FCM) clustering reveal that the remarkable enhancement of growth synchrony among trees mainly occur in warm conditions. This is different from previous findings indicating that increased consistence among temperature sensitive tree rings in cold periods. This may be related to the reduced temperature sensitivity of regional tree growth as winter minimum temperature is lower than a certain threshold, which is in agreement with the “principle of ecological amplitude”. In addition, it is worth noting that precipitation in June have started to restrain the tree growth since the beginning of the 1980s, which is possibly an important contributor for synchronized growth among trees in SETP.
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spelling pubmed-48925912016-06-16 Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau Zhou, Feifei Fang, Keyan Zhang, Fen Dong, Zhipeng Chen, Dan PLoS One Research Article Knowledge about the spatiotemporal tree growth variability and its associations with climate provides key insights into forest dynamics under future scenarios of climate change. We synthesized 17 tree-ring width chronologies from four tree species at the high-elevation sites in the southeast Tibetan Plateau (SETP) to study the regional tree growth variability and climate-growth relationships. Despite of diverse habitats and different physiological characteristics of these species, these tree-ring chronologies shared a significant common variance in SETP. An unprecedented increase in the shared variance is found along the latter half of the 20th century, coinciding with the enhancement of the frequency of extreme rings among chronologies. It is found that minimum winter temperature tends to be the dominant climate for trees in this region. The site-specific responses in cold (1965–1980) and warm (1990–2005) intervals by means of Fuzzy Cmeans (FCM) clustering reveal that the remarkable enhancement of growth synchrony among trees mainly occur in warm conditions. This is different from previous findings indicating that increased consistence among temperature sensitive tree rings in cold periods. This may be related to the reduced temperature sensitivity of regional tree growth as winter minimum temperature is lower than a certain threshold, which is in agreement with the “principle of ecological amplitude”. In addition, it is worth noting that precipitation in June have started to restrain the tree growth since the beginning of the 1980s, which is possibly an important contributor for synchronized growth among trees in SETP. Public Library of Science 2016-06-03 /pmc/articles/PMC4892591/ /pubmed/27257971 http://dx.doi.org/10.1371/journal.pone.0156126 Text en © 2016 Zhou et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Zhou, Feifei
Fang, Keyan
Zhang, Fen
Dong, Zhipeng
Chen, Dan
Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title_full Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title_fullStr Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title_full_unstemmed Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title_short Climate-Driven Synchronized Growth of Alpine Trees in the Southeast Tibetan Plateau
title_sort climate-driven synchronized growth of alpine trees in the southeast tibetan plateau
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4892591/
https://www.ncbi.nlm.nih.gov/pubmed/27257971
http://dx.doi.org/10.1371/journal.pone.0156126
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