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Phylogenetic Trees03:21

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Basic Plant Anatomy: Roots, Stems, and Leaves02:27

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Related Experiment Video

Updated: May 19, 2026

A Simple Planting Technique for Re-establishing Trees Where Frequent Inundation Occurs
04:41

A Simple Planting Technique for Re-establishing Trees Where Frequent Inundation Occurs

Published on: January 26, 2018

Treelines will be understood once the functional difference between a tree and a shrub is.

Christian Körner1

  • 1Institute of Botany, University of Basel, Basel, Switzerland. ch.koerner@unibas.ch

Ambio
|August 7, 2012
PubMed
Summary

Tall trees face colder temperatures due to their size, limiting their range more than smaller plants. Their stature, not physiology, dictates treeline limits in colder climates.

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Published on: September 22, 2023

Area of Science:

  • Ecology
  • Plant Physiology
  • Biometeorology

Background:

  • Trees are taller than shrubs, grasses, and herbs.
  • Biological treeline theory is not fully understood.
  • The reasons for treeline limitations are debated.

Purpose of the Study:

  • To explore the significance of tallness from a carbon balance, freezing resistance, and microclimatological perspective.
  • To understand why trees are restricted to warmer regions than low stature life forms.
  • To review the current state of biological treeline theory.

Main Methods:

  • Review of biological treeline theory.
  • Analysis of tallness from carbon balance perspective.
  • Exploration of freezing resistance in trees.
  • Microclimatological assessment of tree stature.

Main Results:

  • A woody stem is not a burden to the carbon balance.
  • Having a woody stem does not increase the risk of freezing damage.
  • Trees experience critically low temperatures at lower elevations and latitudes than smaller plants due to aerodynamic coupling.
  • Physical reasons related to stature limit trees at the treeline.

Conclusions:

  • Tree stature, not physiological limitations, restricts their range.
  • Aerodynamic coupling to air circulation causes trees to experience lower temperatures.
  • Physical constraints of tallness determine the biological treeline.