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Title: An empirical method that separates irreversible stem radial growth from bark water content changes in trees: theory and case studies

Journal Article · · Plant, Cell and Environment
DOI: https://doi.org/10.1111/pce.12863 · OSTI ID:1412906
 [1];  [2];  [3];  [4];  [5];  [6];  [3];  [5];  [7];  [8];  [5]
  1. Univ. of Edinburgh, Scotland (United Kingdom). School of GeoSciences; Centre for Research on Ecology and Forestry Applications (CREAF), Barcelona (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain)
  2. Univ. of Helsinki (Finland). Dept. of Physics
  3. Commonwealth Scientific and Industrial Research Organisation (CSIRO), Hobart, Tas. (Australia). Land and Water
  4. Univ. of Helsinki (Finland). Dept. of Forest Sciences
  5. Western Sydney Univ., Richmond, NSW (Australia). Hawkesbury Inst. for the Environment
  6. Univ. of Edinburgh, Scotland (United Kingdom). School of GeoSciences; Australian National Univ., Canberra, ACT (Australia). Research School of Biology
  7. Swiss Federal Inst. for Forest, Snow and Landscape Research, (WSL), Birmensdorf (Switzerland)
  8. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Substantial uncertainty surrounds our knowledge of tree stem growth, with some of the most basic questions, such as when stem radial growth occurs through the daily cycle, still unanswered. Here, we employed high-resolution point dendrometers, sap flow sensors, and developed theory and statistical approaches, to devise a novel method separating irreversible radial growth from elastic tension-driven and elastic osmotically driven changes in bark water content. We tested this method using data from five case study species. Experimental manipulations, namely a field irrigation experiment on Scots pine and a stem girdling experiment on red forest gum trees, were used to validate the theory. Time courses of stem radial growth following irrigation and stem girdling were consistent with a-priori predictions. Patterns of stem radial growth varied across case studies, with growth occurring during the day and/or night, consistent with the available literature. Importantly, our approach provides a valuable alternative to existing methods, as it can be approximated by a simple empirical interpolation routine that derives irreversible radial growth using standard regression techniques. In conclusion, our novel method provides an improved understanding of the relative source–sink carbon dynamics of tree stems at a sub-daily time scale.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; Natural Environment Research Council (NERC)
Grant/Contract Number:
AC52-06NA25396; NE/I011749/1; 11/022839; FT110100457
OSTI ID:
1412906
Report Number(s):
LA-UR-17-27764
Journal Information:
Plant, Cell and Environment, Vol. 40, Issue 2; ISSN 0140-7791
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (18)

Respiration in wood: integrating across tissues, functions and scales journal October 2019
High growth potential of Ailanthus altissima in warm and dry weather conditions in novel forests of southern Switzerland journal November 2018
Boreal tree hydrodynamics: asynchronous, diverging, yet complementary journal May 2018
Linking stem growth respiration to the seasonal course of stem growth and GPP of Scots pine journal May 2018
Seasonal Dynamics of Stem Radial Increment of Pinus taiwanensis Hayata and Its Response to Environmental Factors in the Lushan Mountains, Southeastern China journal June 2018
The Relationship between Stem Diameter Shrinkage and Tree Bole Moisture Loss Due to Transpiration journal March 2019
Modelling water fluxes in plants: from tissues to biosphere journal February 2019
Stem radial growth and water storage responses to heat and drought vary between conifers with differing hydraulic strategies: Semiarid conifers responses to drought and heat journal June 2018
TR eSpire – a biophysical TR ee Stem respiration model journal October 2019
Xylem hydraulic safety and construction costs determine tropical tree growth: Tree growth vs hydraulic safety trade-off journal January 2018
Seasonal Drought Effects on Intra-Annual Stem Growth of Taiwan Pine along an Elevational Gradient in Subtropical China journal December 2019
Disentangling the net: concomitant xylem and over-bark size measurements reveal the phloem-generated turgor signal behind daytime stem swelling in the mangrove Avicennia marina journal January 2019
Water potential control of turgor‐driven tracheid enlargement in Scots pine at its xeric distribution edge journal September 2019
Determinants of legacy effects in pine trees – implications from an irrigation‐stop experiment journal May 2020
Daily stem diameter variations can predict the canopy water status of mature temperate trees journal March 2018
Daytime depression in temperature-normalised stem CO 2 efflux in young poplar trees is dominated by low turgor pressure rather than by internal transport of respired CO 2 journal October 2017
Stem cycle analyses help decipher the nonlinear response of trees to concurrent warming and drought journal August 2019
Determinants of legacy effects in pine trees – implications from an irrigation‐stop experiment text January 2020

Figures / Tables (7)