Earlywood structure of evergreen conifers near forest line is habitat driven but latewood depends on species and seasons

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1007/s00468-020-02050-2

Ключевые слова: cold environment, earlywood, evergreen conifers, latewood, quantitative wood anatomy

Аннотация: Key message: Near upper forest line, values of conifer wood anatomical traits are species-specific, but relationships among traits are common. Growing season temperature significantly impacts wood anatomy only in its extremes. Abstract: Quantitative wood anatomy can provide detailed insight into adaptation of trees to changing enviПоказать полностьюronment, especially on the borders of species distribution ranges. This study investigated wood anatomy of Pinus sylvestris L., Pinus sibirica Du Tour, and Picea obovata Ledeb. near the forest line in the Western Sayan Mountains, where local climate changes rapidly. Anatomical traits reflecting three developmental stages of conifer tracheids (division = cell number, cell enlargement = radial diameter, and secondary wall deposition = cell wall thickness) were calculated for earlywood, latewood and total tree ring over 50 years. Similar earlywood anatomical structure and low between-trait correlations (r = 0.21…67) were observed in all species, which supports prevalence of external impact on its formation, i.e. that shared habitat, climate, and similar habitus provide common trade-off between hydraulic efficiency and safety. Also, stronger nonlinearity of relationship between cell number and radial diameter in earlywood decreased correlations between them. In latewood, anatomical traits are strongly interconnected (r = 0.63…93) for all species. However, Siberian pine has significantly less pronounced latewood; later switch from earlywood and different strategy of carbon allocation are proposed as possible reasons. Length of vegetative season and sum of temperatures above thresholds 5 °C and 8 °C have no significant correlations with anatomical traits, but extremes of these temperature variables led to forming more pronounced latewood (higher proportion of latewood cells with thicker walls) during warm/long vegetative seasons than during short/cool ones. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

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Издание

Журнал: Trees - Structure and Function

ISSN журнала: 09311890

Издатель: Springer Science and Business Media Deutschland GmbH

Авторы

  • Zhirnova Dina F. (Siberian Fed Univ, Khakass Tech Inst, Abakan, Russia)
  • Belokopytova Liliana (Siberian Fed Univ, Khakass Tech Inst, Abakan, Russia)
  • Babushkina Elena A. (Siberian Fed Univ, Khakass Tech Inst, Abakan, Russia)
  • Crivellaro Alan (Univ Cambridge, Dept Geog, Cambridge, England; Stefan Cel Mare Univ Suceava, Suceava, Romania)
  • Vaganov Eugene A. (Siberian Fed Univ, Krasnoyarsk, Russia; Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk, Russia; Russian Acad Sci, Ctr Forest Ecol & Prod, Moscow, Russia)

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