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Differentiating drought legacy effects on vegetation growth over the temperate Northern Hemisphere

X. Wu, H. Liu, X. Li, P. Ciais, F. Babst, W. Guo, C. Zhang, V. Magliulo, M. Pavelka, S. Liu, Y. Huang, P. Wang, C. Shi, Y. Ma,

. 2018 ; 24 (1) : 504-516. [pub] 20171023

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc19001164

In view of future changes in climate, it is important to better understand how different plant functional groups (PFGs) respond to warmer and drier conditions, particularly in temperate regions where an increase in both the frequency and severity of drought is expected. The patterns and mechanisms of immediate and delayed impacts of extreme drought on vegetation growth remain poorly quantified. Using satellite measurements of vegetation greenness, in-situ tree-ring records, eddy-covariance CO2 and water flux measurements, and meta-analyses of source water of plant use among PFGs, we show that drought legacy effects on vegetation growth differ markedly between forests, shrubs and grass across diverse bioclimatic conditions over the temperate Northern Hemisphere. Deep-rooted forests exhibit a drought legacy response with reduced growth during up to 4 years after an extreme drought, whereas shrubs and grass have drought legacy effects of approximately 2 years and 1 year, respectively. Statistical analyses partly attribute the differences in drought legacy effects among PFGs to plant eco-hydrological properties (related to traits), including plant water use and hydraulic responses. These results can be used to improve the representation of drought response of different PFGs in land surface models, and assess their biogeochemical and biophysical feedbacks in response to a warmer and drier climate.

Citace poskytuje Crossref.org

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$a In view of future changes in climate, it is important to better understand how different plant functional groups (PFGs) respond to warmer and drier conditions, particularly in temperate regions where an increase in both the frequency and severity of drought is expected. The patterns and mechanisms of immediate and delayed impacts of extreme drought on vegetation growth remain poorly quantified. Using satellite measurements of vegetation greenness, in-situ tree-ring records, eddy-covariance CO2 and water flux measurements, and meta-analyses of source water of plant use among PFGs, we show that drought legacy effects on vegetation growth differ markedly between forests, shrubs and grass across diverse bioclimatic conditions over the temperate Northern Hemisphere. Deep-rooted forests exhibit a drought legacy response with reduced growth during up to 4 years after an extreme drought, whereas shrubs and grass have drought legacy effects of approximately 2 years and 1 year, respectively. Statistical analyses partly attribute the differences in drought legacy effects among PFGs to plant eco-hydrological properties (related to traits), including plant water use and hydraulic responses. These results can be used to improve the representation of drought response of different PFGs in land surface models, and assess their biogeochemical and biophysical feedbacks in response to a warmer and drier climate.
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$a Liu, Hongyan $u College of Urban and Environmental Science, Peking University, Beijing, China.
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$a Li, Xiaoyan $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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$a Ciais, Philippe $u CEA-CNRS-UVSQ, UMR8212-Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Gif-Sur-Yvette, France.
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$a Babst, Flurin $u Dendro Sciences, Swiss Federal Research Institute WSL, Birmensdorf, Switzerland. W. Szafer Institute of Botany, Polish Academy of Sciences, Krakow, Poland.
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$a Guo, Weichao $u College of Urban and Environmental Science, Peking University, Beijing, China.
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$a Zhang, Cicheng $u Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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$a Magliulo, Vincenzo $u National Research Council of Italy, Institute for Mediterranean Agriculture and Forest Systems (CNR-ISAFoM), Ercolano, Italy.
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$a Pavelka, Marian $u CzechGlobe-Global Change Research Institute CAS, Brno, Czech Republic.
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$a Liu, Shaomin $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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$a Huang, Yongmei $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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$a Wang, Pei $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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$a Shi, Chunming $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. College of Global Change and Earth System Science, Beijing Normal University, Beijing, China.
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$a Ma, Yujun $u State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China. Faculty of Geographical Science, Beijing Normal University, Beijing, China.
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