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Related Experiment Video

Updated: Jan 26, 2026

Isolation and Expansion of Neurospheres from Postnatal (P1−3) Mouse Neurogenic Niches

Isolation and Expansion of Neurospheres from Postnatal (P1−3) Mouse Neurogenic Niches

Published on: May 23, 2020

Principles of niche expansion.

Henrik Sjödin¹, Jörgen Ripa¹, Per Lundberg¹

¹Theoretical Population Ecology and Evolution Group (ThePEG), Department of Biology, Lund University , 22362 Lund , Sweden.

Proceedings. Biological Sciences

|April 10, 2019

Summary

This summary is machine-generated.

Niche expansion occurs via phenotypical differentiation or individual generalization. Resource diversity and acquisition trade-offs determine which strategy evolves, offering a unified theory for niche evolution.

Keywords:

individual specialization niche evolution niche expansion niche variation hypothesis niche width

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Area of Science:

Ecology
Evolutionary Biology
Theoretical Ecology

Background:

Niche expansion is key to species adaptation and diversification.
Existing theories, like the niche variation hypothesis, propose expansion via niche position variation, but this is debated.
Alternative mechanisms for niche filling remain underexplored.

Purpose of the Study:

To propose a general theory of niche expansion.
To investigate the roles of resource diversity and acquisition trade-offs in niche evolution.
To identify discrete pathways for niche filling.

Main Methods:

Review of empirical data on niche expansion.
Development and analysis of an eco-evolutionary model.
Exploration of resource diversity and acquisition trade-off impacts.

Main Results:

Niche expansion is constrained to two orthogonal strategies: phenotypical differentiation or individual generalization.
A shift from individual generalization to phenotypical differentiation occurs when resource diversity is high and generalization is costly.
These principles apply across evolutionary and short-term ecological timescales.

Conclusions:

A unified theory of niche expansion is presented, driven by resource diversity and acquisition trade-offs.
Environmental change dictates niche expansion through a principle of orthogonality between differentiation and generalization.
The study reconciles empirical observations with theoretical predictions on niche evolution.