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Related Experiment Video

Updated: Jun 10, 2025

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Published on: September 22, 2023

Tracking tree demography and forest dynamics at scale using remote sensing.

Robin Battison¹, Suzanne M Prober², Katherine Zdunic³

¹School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK.

The New Phytologist

|October 19, 2024

Summary

This summary is machine-generated.

This study tracked tree growth and survival in Western Australia using airborne laser scanning. Tree size, competition, and topography influence demography, with wetter areas supporting more growth and survival, indicating woodlands are carbon sinks.

Keywords:

LiDAR competition growth mortality recruitment topography tree crown delineation wildfires

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Area of Science:

Ecology
Forest Science
Remote Sensing

Background:

Understanding tree demography is crucial for ecosystem dynamics.
Characterizing large-scale tree population processes is challenging due to slow growth and vast areas.

Purpose of the Study:

To track individual tree height growth, crown expansion, and mortality over nine years.
To investigate the influence of tree size, competition, and topography on demographic rates.
To assess the carbon sequestration potential of old-growth woodlands.

Main Methods:

Utilized repeat airborne laser scanning (ALS) data over 25 km² of semi-arid woodland.
Monitored 42,213 individual trees to quantify growth and survival.
Analyzed spatial patterns in relation to topographic wetness.

Main Results:

Demographic rates were constrained by tree size, competition, and topography.
Trees shifted from height growth to crown expansion with increasing size; mortality risk decreased with size.
Tree growth and survival increased with topographic wetness, creating spatially structured vegetation patterns.

Conclusions:

Old-growth woodlands in Western Australia function as a net carbon sink, with biomass gains exceeding mortality losses.
Topographic wetness is a key driver of spatial patterns in tree demography.
Airborne laser scanning provides a scalable method for monitoring tree demography in complex ecosystems.