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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

Biodiversity effects on plant stoichiometry.

Maike Abbas¹, Anne Ebeling, Yvonne Oelmann

¹Institute for Chemistry and Biology of Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, Germany. maike.abbas1@uni-oldenburg.de

|March 14, 2013

Summary

Plant diversity impacts elemental stoichiometry in grasslands, affecting nutrient ratios and chemical composition variance. Higher species richness leads to more predictable forage quality and litter input for ecosystems.

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Area of Science:

Ecology
Biogeochemistry

Background:

Multifunctionality in species communities is a key aspect of the biodiversity-ecosystem functioning debate.
Elemental stoichiometry governs diverse plant responses to environmental factors and influences ecosystem processes.

Purpose of the Study:

To investigate the relationship between plant diversity and elemental stoichiometry in aboveground plant tissues.
To determine how species richness and functional group richness affect community stoichiometry in a grassland ecosystem.

Main Methods:

A 5-year study was conducted in the Jena Experiment, a large grassland biodiversity experiment.
Elemental stoichiometry (C:N, C:P, N:P, C:K, N:K, P:K ratios) of aboveground plant tissue was analyzed.
The effects of species richness and functional group richness on stoichiometry were assessed.

Main Results:

Species richness and functional group richness significantly altered community stoichiometry, notably increasing C:P and N:P ratios.
Legumes and grasses exhibited antagonistic effects on the C:N ratio.
Increased species richness consistently reduced the variance in chemical composition across all elemental ratios.

Conclusions:

Plant diversity influences elemental stoichiometry, with implications for ecosystem functioning.
Reduced plant species diversity may lead to less predictable forage quality for herbivores and altered belowground litter input.
The findings highlight a crucial link between biodiversity and the chemical characteristics of grassland ecosystems.