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Related Experiment Video

Updated: May 3, 2026

JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning

JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning

Published on: March 21, 2025

The history of widespread decrease in oak dominance exemplified in a grassland-forest landscape.

Brice B Hanberry¹, Daniel C Dey², Hong S He¹

¹University of Missouri, 203 Natural Resources Building, Columbia, MO 65211, USA.

The Science of the Total Environment

|February 6, 2014

Summary

This summary is machine-generated.

Oak forest ecosystems are transitioning to denser forests, with oak species declining significantly. Restoration efforts are urgently needed to preserve these vital open woodlands.

Keywords:

Fire suppression Historical forest Land use Oak restoration Savanna Woodland

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Area of Science:

Ecology
Forest Science
Conservation Biology

Background:

Open oak forest ecosystems in North America and Europe have been replaced by agriculture or denser forests.
Understanding historical changes in tree communities and density is crucial for conservation.

Purpose of the Study:

To quantify changes in tree communities and density in Missouri Plains oak ecosystems.
To compare historical (1815-1864) and current (2004-2008) landscape conditions.

Main Methods:

Utilized historical surveys and current surveys for data collection.
Employed the Morisita plotless density estimator for historical density estimation.
Applied Random Forests regression for current forest density prediction using environmental predictors.

Main Results:

Oak species composition decreased from 62% to 30%; dominant oaks (black and white) decreased from 93% to 42% of the landscape.
Current forest density is double historical densities, indicating a loss of savannas and woodlands.
Average tree diameters decreased, but basal area and stocking remained similar due to increased density.

Conclusions:

Oak species are being replaced by other species, mirroring trends across the Quercus range.
Restoration of open oak ecosystems requires prescribed burning and silvicultural interventions.
Urgent, time-sensitive action is needed to prevent further oak loss and increasing restoration costs.