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Related Experiment Video

Updated: Jul 4, 2025

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains

Published on: January 18, 2014

A phylogenomic perspective on interspecific competition.

Nicolas L Louw¹, Benjamin E Wolfe¹, Lawrence H Uricchio¹

¹Department of Biology, Tufts University, Medford, Massachusetts, USA.

Ecology Letters

|February 9, 2024

Summary

Phylogenetic signal in community ecology can be obscured by complex evolutionary histories. This study introduces a method to identify specific genomic regions that reveal true interspecific interactions, improving ecological predictions.

Keywords:

community assembly competition discordance incomplete lineage sorting microbial ecology phylogenomics

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Last Updated: Jul 4, 2025

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Published on: September 2, 2021

Area of Science:

Ecology
Evolutionary Biology
Genomics

Background:

Phylogenetic relatedness is a proposed driver of interspecific interaction strength in community ecology, but empirical evidence is inconsistent.
The evolutionary history of many species is not a single, linear species tree but a complex mosaic of gene trees due to processes like incomplete lineage sorting.
This genomic complexity can obscure the true phylogenetic signal relevant to ecological interactions.

Purpose of the Study:

To investigate the role of discordance between gene trees and species trees in interpreting phylogenetic signal in community ecology.
To develop and demonstrate a method for detecting specific genomic loci that carry ecologically relevant phylogenetic signal.
To explore the genetic basis of interspecific interactions using phylogenomic approaches.

Main Methods:

Considered the impact of gene tree-species tree discordance on phylogenetic signal interpretation.
Developed a method to identify genomic loci exhibiting significant phylogenetic signal.
Applied the method to analyze Penicillium genomes and their pairwise interaction strengths.

Main Results:

Phylogenetic signal relevant to interspecific interactions may be masked when analyzing the entire genome.
Specific genomic loci can harbor detectable phylogenetic signal, even when obscured genome-wide.
The proposed phylogenomic technique successfully identified signal related to Penicillium interaction strength.

Conclusions:

Discordance between gene and species trees can complicate ecological interpretations of phylogenetic data.
Targeted phylogenomic analysis of specific loci can reveal hidden phylogenetic signals relevant to ecological interactions.
This approach offers a new perspective on the genetic underpinnings of community assembly and interspecific dynamics.