Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China
Abstract Tree-ring δ13C and δ18O of dominant Dahurian larch and Mongolia pine in the permafrost region of the northern Great Higgnan Mountains, China were used to elucidate species-specific ecophysiological responses to warming temperatures and increasing CO2 over the past century. Larch and pine st...
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Oxford University Press (OUP)
2018
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Online Access: | http://dx.doi.org/10.1093/treephys/tpy060 http://academic.oup.com/treephys/article-pdf/39/1/88/33043829/tpy060.pdf |
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croxfordunivpr:10.1093/treephys/tpy060 2024-09-15T18:29:55+00:00 Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China Liu, Xiaohong Zhao, Liangju Voelker, Steven Xu, Guobao Zeng, Xiaomin Zhang, Xuanwen Zhang, Lingnan Sun, Weizhen Zhang, Qiuliang Wu, Guoju Li, Xiaoqin Cernusak, Lucas National Natural Science Foundation of China Fundamental Research Funds for the Central Universities 2018 http://dx.doi.org/10.1093/treephys/tpy060 http://academic.oup.com/treephys/article-pdf/39/1/88/33043829/tpy060.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Tree Physiology volume 39, issue 1, page 88-103 ISSN 1758-4469 journal-article 2018 croxfordunivpr https://doi.org/10.1093/treephys/tpy060 2024-08-05T04:29:06Z Abstract Tree-ring δ13C and δ18O of dominant Dahurian larch and Mongolia pine in the permafrost region of the northern Great Higgnan Mountains, China were used to elucidate species-specific ecophysiological responses to warming temperatures and increasing CO2 over the past century. Larch and pine stable carbon discrimination (Δ13C) 13C and δ18O in tree rings both showed synchronous changes during the investigated period (1901–2010), but with species-specific isotopic responses to atmospheric enriched CO2 and warming. Tree-ring Δ13C and δ18O were controlled by both maximum temperature and moisture conditions (precipitation, relative humidity and vapor pressure deficit), but with different growth periods (Δ13C in June–July and δ18O in July–August, respectively). In addition, stable isotopes of larch showed relatively greater sensitivity to moisture deficits than pine. Climatic conditions from 1920 to 1960 strongly and coherently regulated tree-ring Δ13C and δ18O through stomatal conductance. However, climatic-sensitivities of tree-ring Δ13C and δ18O recently diverged, implying substantial adjustments of stomatal conductance, photosynthetic rate and altered water sources over recent decades, which reveal the varied impacts of each factor on tree-ring Δ13C and δ18O over time. Based on expected changes in leaf gas-exchange, we isolated the impacts of atmospheric CO2 and climate change on intrinsic water-use efficiency (iWUE) over the past century. Higher intracellular CO2 in pine than larch from 1960 onwards suggests this species may be more resilient to severe droughts in the future. Our data also illustrated no weakening of the iWUE response to increasing CO2 in trees from this permafrost region. The overall pattern of CO2 enrichment and climate impacts on iWUE of pine and larch were similar, but warming increased iWUE of larch to a greater extent than that of pine over recent two decades. Taken together, our findings highlight the importance of considering how leaf gas-exchange responses to atmospheric CO2 ... Article in Journal/Newspaper permafrost Oxford University Press Tree Physiology 39 1 88 103 |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Tree-ring δ13C and δ18O of dominant Dahurian larch and Mongolia pine in the permafrost region of the northern Great Higgnan Mountains, China were used to elucidate species-specific ecophysiological responses to warming temperatures and increasing CO2 over the past century. Larch and pine stable carbon discrimination (Δ13C) 13C and δ18O in tree rings both showed synchronous changes during the investigated period (1901–2010), but with species-specific isotopic responses to atmospheric enriched CO2 and warming. Tree-ring Δ13C and δ18O were controlled by both maximum temperature and moisture conditions (precipitation, relative humidity and vapor pressure deficit), but with different growth periods (Δ13C in June–July and δ18O in July–August, respectively). In addition, stable isotopes of larch showed relatively greater sensitivity to moisture deficits than pine. Climatic conditions from 1920 to 1960 strongly and coherently regulated tree-ring Δ13C and δ18O through stomatal conductance. However, climatic-sensitivities of tree-ring Δ13C and δ18O recently diverged, implying substantial adjustments of stomatal conductance, photosynthetic rate and altered water sources over recent decades, which reveal the varied impacts of each factor on tree-ring Δ13C and δ18O over time. Based on expected changes in leaf gas-exchange, we isolated the impacts of atmospheric CO2 and climate change on intrinsic water-use efficiency (iWUE) over the past century. Higher intracellular CO2 in pine than larch from 1960 onwards suggests this species may be more resilient to severe droughts in the future. Our data also illustrated no weakening of the iWUE response to increasing CO2 in trees from this permafrost region. The overall pattern of CO2 enrichment and climate impacts on iWUE of pine and larch were similar, but warming increased iWUE of larch to a greater extent than that of pine over recent two decades. Taken together, our findings highlight the importance of considering how leaf gas-exchange responses to atmospheric CO2 ... |
author2 |
Cernusak, Lucas National Natural Science Foundation of China Fundamental Research Funds for the Central Universities |
format |
Article in Journal/Newspaper |
author |
Liu, Xiaohong Zhao, Liangju Voelker, Steven Xu, Guobao Zeng, Xiaomin Zhang, Xuanwen Zhang, Lingnan Sun, Weizhen Zhang, Qiuliang Wu, Guoju Li, Xiaoqin |
spellingShingle |
Liu, Xiaohong Zhao, Liangju Voelker, Steven Xu, Guobao Zeng, Xiaomin Zhang, Xuanwen Zhang, Lingnan Sun, Weizhen Zhang, Qiuliang Wu, Guoju Li, Xiaoqin Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
author_facet |
Liu, Xiaohong Zhao, Liangju Voelker, Steven Xu, Guobao Zeng, Xiaomin Zhang, Xuanwen Zhang, Lingnan Sun, Weizhen Zhang, Qiuliang Wu, Guoju Li, Xiaoqin |
author_sort |
Liu, Xiaohong |
title |
Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
title_short |
Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
title_full |
Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
title_fullStr |
Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
title_full_unstemmed |
Warming and CO2 enrichment modified the ecophysiological responses of Dahurian larch and Mongolia pine during the past century in the permafrost of northeastern China |
title_sort |
warming and co2 enrichment modified the ecophysiological responses of dahurian larch and mongolia pine during the past century in the permafrost of northeastern china |
publisher |
Oxford University Press (OUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1093/treephys/tpy060 http://academic.oup.com/treephys/article-pdf/39/1/88/33043829/tpy060.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Tree Physiology volume 39, issue 1, page 88-103 ISSN 1758-4469 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/treephys/tpy060 |
container_title |
Tree Physiology |
container_volume |
39 |
container_issue |
1 |
container_start_page |
88 |
op_container_end_page |
103 |
_version_ |
1810471396520755200 |