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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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Phylogenetic-scale disparities in the soil microbial diversity-ecosystem functioning relationship.

Marta Goberna¹, Miguel Verdú²

¹Centro de Investigaciones Sobre Desertificación (CIDE; CSIC-UV-GV), Carretera Moncada-Náquera km. 4.5, Valencia, E-46113, Spain.

The ISME Journal

|June 9, 2018

Summary

Bacterial evolution shapes ecosystem functions. Recently evolved bacterial lineages enhance microbial productivity and nutrient cycling more than ancient ones, impacting ecosystem functioning.

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A Practical Guide to Phylogenetics for Nonexperts

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

Area of Science:

Microbial ecology
Evolutionary biology
Soil science

Background:

Bacterial evolutionary history influences functional traits and ecosystem functions (EFs).
Phylogeny can predict bacterial functionality due to trait conservatism in prokaryotes.
Ecosystem productivity depends on phylogenetic diversity (PD) and community composition, with ancient vs. recent lineages having different impacts.

Purpose of the Study:

To investigate how bacterial evolutionary history and community assembly influence ecosystem functions in a Mediterranean soil ecosystem.
To test the hypothesis that EF is driven by both competitive superiority of ancient lineages and functional complementarity of recent lineages.

Main Methods:

Sequencing of a bacterial phylogenetic marker across 28 soil plots.
Quantification of ecosystem functions including microbial productivity, decomposition, and nutrient cycling.

Main Results:

Soil plots with recently divergent bacterial lineages exhibited higher ecosystem function levels.
The accumulation of ancient lineages had a minor modifying effect on ecosystem functions.
Community composition, particularly the prevalence of recent lineages, was a key determinant of ecosystem functioning.

Conclusions:

Recent bacterial lineages contribute more significantly to ecosystem functions than ancient ones in this Mediterranean ecosystem.
Community assembly processes, favoring recent lineages, are crucial for ecosystem functioning.
Understanding the interplay between phylogeny and ecosystem function is vital for predicting microbial contributions to ecological processes.