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Related Experiment Video

Updated: Sep 11, 2025

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

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Published on: March 21, 2025

Distinguishing Short-Term Versus Long-Term Responses in Cover-Class Structured Community Dynamics: A Test With

Aryaman Gupta^1,2, Samuel J L Gascoigne^1,3, György Barabás^4,5

¹Department of Biology, University of Oxford, Oxford, UK.

Ecology Letters

|August 13, 2025

Summary

Climate change impacts grassland dynamics. This study models transient and long-term community responses to extreme precipitation, revealing how functional groups like grasses and legumes shift under drought or irrigation.

Keywords:

disturbance extreme precipitation functional group grasslands integral projection model (IPM)interspecific interactions pseudospectra stress gradient hypothesis transient instability

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Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

Published on: July 24, 2018

Area of Science:

Ecology
Climate Change Science
Mathematical Biology

Background:

Climate change intensifies precipitation extremes, destabilizing grassland ecosystems.
Predictive models often overlook short-term (transient) dynamics, focusing on long-term (asymptotic) behavior.
Understanding grassland community shifts under environmental variability is crucial.

Purpose of the Study:

To model short- and long-term responses of grassland functional groups to precipitation extremes.
To investigate the role of transient dynamics in grassland community stability.
To assess the influence of irrigation and drought on functional group dominance.

Main Methods:

Utilized 8-year experimental cover data for grassland functional groups (grasses, legumes, forbs).
Employed Integral Projection Models (IPMs) to simulate community dynamics.
Applied pseudospectral theory to analyze transient and asymptotic stability.

Main Results:

Grassland communities exhibit transient instability but asymptotic stability, with initial disturbance amplification followed by dissipation.
Grasses dominate under irrigated conditions, while legumes and forbs are favored by drought.
Pseudospectra of IPMs provide an efficient method for assessing transient dynamics' impact on community responses.

Conclusions:

Transient dynamics significantly influence grassland community responses to precipitation extremes.
Functional group interactions and cover structure contribute to observed stability patterns.
IPMs and pseudospectral analysis offer valuable tools for predicting grassland ecosystem behavior under climate change.