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Title: Dominant role of plant physiology in trend and variability of gross primary productivity in North America

Abstract

Annual gross primary productivity (GPP) varies considerably due to climate-induced changes in plant phenology and physiology. However, the relative importance of plant phenology and physiology on annual GPP variation is not clear. In this study, a Statistical Model of Integrated Phenology and Physiology (SMIPP) was used to evaluate the relative contributions of maximum daily GPP (GPP max) and the start and end of growing season (GS start and GS end) to annual GPP variability, using a regional GPP product in North America during 2000-2014 and GPP data from 24 AmeriFlux sites. Climatic sensitivity of the three indicators was assessed to investigate the climate impacts on plant phenology and physiology. The SMIPP can explain 98% of inter-annual variability of GPP over mid- and high latitudes in North America. The long-term trend and inter-annual variability of GPP are dominated by GPP max both at the ecosystem and regional scales. During warmer spring and autumn, GS start is advanced and GS end delayed, respectively. GPP max responds positively to summer temperature over high latitudes (40-80°N), but negatively in mid-latitudes (25-40°N). This study demonstrates that plant physiology, rather than phenology, plays a dominant role in annual GPP variability, indicating more attention should be paidmore » to physiological change under futher climate change.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]
  1. Tsinghua Univ., Beijing (China); Princeton Univ., NJ (United States)
  2. Univ. of Oklahoma, Norman, OK (United States)
  3. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)
  4. Univ. of Oklahoma, Norman, OK (United States); Fudan Univ., Shanghai (China)
  5. Univ. of Oklahoma, Norman, OK (United States); Tsinghua Univ., Beijing (China)
  6. Princeton Univ., NJ (United States)
  7. Tsinghua Univ., Beijing (China); Qinghai Univ. (China)
  8. Tsinghua Univ., Beijing (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1567075
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Zhou, Sha, Zhang, Yao, Ciais, Philippe, Xiao, Xiangming, Luo, Yiqi, Caylor, Kelly K., Huang, Yuefei, and Wang, Guangqian. Dominant role of plant physiology in trend and variability of gross primary productivity in North America. United States: N. p., 2017. Web. doi:10.1038/srep41366.
Zhou, Sha, Zhang, Yao, Ciais, Philippe, Xiao, Xiangming, Luo, Yiqi, Caylor, Kelly K., Huang, Yuefei, & Wang, Guangqian. Dominant role of plant physiology in trend and variability of gross primary productivity in North America. United States. doi:10.1038/srep41366.
Zhou, Sha, Zhang, Yao, Ciais, Philippe, Xiao, Xiangming, Luo, Yiqi, Caylor, Kelly K., Huang, Yuefei, and Wang, Guangqian. Wed . "Dominant role of plant physiology in trend and variability of gross primary productivity in North America". United States. doi:10.1038/srep41366. https://www.osti.gov/servlets/purl/1567075.
@article{osti_1567075,
title = {Dominant role of plant physiology in trend and variability of gross primary productivity in North America},
author = {Zhou, Sha and Zhang, Yao and Ciais, Philippe and Xiao, Xiangming and Luo, Yiqi and Caylor, Kelly K. and Huang, Yuefei and Wang, Guangqian},
abstractNote = {Annual gross primary productivity (GPP) varies considerably due to climate-induced changes in plant phenology and physiology. However, the relative importance of plant phenology and physiology on annual GPP variation is not clear. In this study, a Statistical Model of Integrated Phenology and Physiology (SMIPP) was used to evaluate the relative contributions of maximum daily GPP (GPPmax) and the start and end of growing season (GSstart and GSend) to annual GPP variability, using a regional GPP product in North America during 2000-2014 and GPP data from 24 AmeriFlux sites. Climatic sensitivity of the three indicators was assessed to investigate the climate impacts on plant phenology and physiology. The SMIPP can explain 98% of inter-annual variability of GPP over mid- and high latitudes in North America. The long-term trend and inter-annual variability of GPP are dominated by GPPmax both at the ecosystem and regional scales. During warmer spring and autumn, GSstart is advanced and GSend delayed, respectively. GPPmax responds positively to summer temperature over high latitudes (40-80°N), but negatively in mid-latitudes (25-40°N). This study demonstrates that plant physiology, rather than phenology, plays a dominant role in annual GPP variability, indicating more attention should be paid to physiological change under futher climate change.},
doi = {10.1038/srep41366},
journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {2}
}

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    Works referencing / citing this record:

    Response of Water Use Efficiency to Global Environmental Change Based on Output From Terrestrial Biosphere Models: Drivers of WUE Variability
    journal, November 2017

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    A global moderate resolution dataset of gross primary production of vegetation for 2000–2016
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