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Updated: Jul 11, 2026

Resurrection of Dormant Daphnia magna: Protocol and Applications

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

A new mechanism for recurrent adaptive radiations.

Hiroshi C Ito¹, Ulf Dieckmann

¹Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan. itoh9@dolphin.c.u-tokyo.ac.jp

The American Naturalist

|September 25, 2007

Summary

This study introduces a simple model extension for adaptive radiation, revealing how traits under selection drive recurrent evolutionary radiations and extinctions. The findings are robust across various assumptions and population types.

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Area of Science:

Ecology
Evolutionary Biology
Theoretical Biology

Background:

Adaptive radiation models focus on intraspecific competition.
Understanding macroevolutionary patterns requires incorporating trait selection.

Purpose of the Study:

To investigate macroevolutionary patterns arising from extended adaptive radiation models.
To explore the impact of quantitative traits under weak directional selection.

Main Methods:

Extending existing models of adaptive radiation.
Incorporating a quantitative trait under weak directional selection.
Testing model robustness across variations in assumptions.

Main Results:

The extended model naturally generates recurrent adaptive radiations and extinctions.
These patterns occur in both asexual and sexual populations.
The phenomena are driven by generic features of fitness landscapes.

Conclusions:

Simple model extensions can yield complex macroevolutionary dynamics.
Frequency-dependent disruptive selection and weak directional selection drive diversification.
The findings are broadly applicable across diverse eco-evolutionary settings.