Cell size and wall dimensions drive distinct variability of earlywood and latewood density in Northern Hemisphere conifers : научное издание

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1111/nph.14639

Ключевые слова: Dendroclimatology, Ring width, Tracheid anatomy, Tree-ring network, Wood density, Xylem function

Аннотация: Interannual variability of wood density - an important plant functional trait and environmental proxy - in conifers is poorly understood. We therefore explored the anatomical basis of density. We hypothesized that earlywood density is determined by tracheid size and latewood density by wall dimensions, reflecting their different functional tasks. To determine general patterns of variability, density parameters from 27 species and 349 sites across the Northern Hemisphere were correlated to tree-ring width parameters and local climate. We performed the same analyses with density and width derived from anatomical data comprising two species and eight sites. The contributions of tracheid size and wall dimensions to density were disentangled with sensitivity analyses. Notably, correlations between density and width shifted from negative to positive moving from earlywood to latewood. Temperature responses of density varied intraseasonally in strength and sign. The sensitivity analyses revealed tracheid size as the main determinant of earlywood density, while wall dimensions become more influential for latewood density. Our novel approach of integrating detailed anatomical data with large-scale tree-ring data allowed us to contribute to an improved understanding of interannual variations of conifer growth and to illustrate how conifers balance investments in the competing xylem functions of hydraulics and mechanical support. © 2017 New Phytologist Trust.

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Издание

Журнал: New Phytologist

ISSN журнала: 0028646X

Издатель: Blackwell Publishing Ltd

Авторы

  • Björklund J. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland)
  • Seftigen K. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland, Gothenburg University Laboratory for Dendrochronology Department of Earth Sciences University of Gothenburg Guldhedsgatan 5a Göteborg 40530 Sweden, Université catholique de Louvain Earth and Life Institute Georges Lemaître Centre for Earth and Climate Research Place Louis Pasteur Louvain-la-Neuve B-1348 Belgium)
  • Schweingruber F. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland)
  • Fonti P. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland)
  • von Arx G. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland, Climatic Change and Climate Impacts Institute for Environmental Sciences 66 Blvd Carl Vogt Geneva CH-1205 Switzerland)
  • Bryukhanova M.V. (V.N. Sukachev Institute of Forest SB RAS Akademgorodok 50 bld.28 Krasnoyarsk 660036 Russia, Siberian Federal University Svobodny pr. 79 Krasnoyarsk 660041 Russia)
  • Cuny H.E. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland)
  • Carrer M. (Dept. TeSAF University of Padova Via dell'Università 16 Legnaro (PD) I-35020 Italy)
  • Castagneri D. (Dept. TeSAF University of Padova Via dell'Università 16 Legnaro (PD) I-35020 Italy)
  • Frank D.C. (Swiss Federal Institute for Forest Snow and Landscape Research WSL Zuercherstrasse 111 Birmensdorf 8903 Switzerland, Laboratory of Tree-Ring Research University of Arizona 1215 E Lowell St Tucson 85721AZ USA)

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