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Title: The space‐time continuum: the effects of elevated CO 2 and temperature on trees and the importance of scaling

Journal Article · · Plant, Cell and Environment
DOI:https://doi.org/10.1111/pce.12527· OSTI ID:1401137
 [1];  [2];  [3]
  1. Department of Biology University of Western Ontario London ON N6A 5B7 Canada, Nicholas School of the Environment Duke University Durham NC 27708 USA
  2. Nicholas School of the Environment Duke University Durham NC 27708 USA, Department of Forest Ecology and Management Swedish University of Agricultural Sciences (SLU) Umeå SE‐901 83 Sweden
  3. Department of Biology University of Western Ontario London ON N6A 5B7 Canada

Abstract To predict how forests will respond to rising temperatures and atmospheric CO 2 concentrations, we need to understand how trees respond to both of these environmental factors. In this review, we discuss the importance of scaling, moving from leaf‐level responses to those of the canopy, and from short‐term to long‐term responses of vegetation to climate change. While our knowledge of leaf‐level, instantaneous responses of photosynthesis, respiration, stomatal conductance, transpiration and water‐use efficiency to elevated CO 2 and temperature is quite good, our ability to scale these responses up to larger spatial and temporal scales is less developed. We highlight which physiological processes are least understood at various levels of study, and discuss how ignoring differences in the spatial or temporal scale of a physiological process impedes our ability to predict how forest carbon and water fluxes forests will be altered in the future. We also synthesize data from the literature to show that light respiration follows a generalized temperature response across studies, and that the light compensation point of photosynthesis is reduced by elevated growth CO 2 . Lastly, we emphasize the need to move beyond single factorial experiments whenever possible, and to combine both CO 2 and temperature treatments in studies of tree performance.

Sponsoring Organization:
USDOE
OSTI ID:
1401137
Journal Information:
Plant, Cell and Environment, Journal Name: Plant, Cell and Environment Vol. 38 Journal Issue: 6; ISSN 0140-7791
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 92 works
Citation information provided by
Web of Science

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