Eco-evolutionary dynamics

– Einum Lab

In an era of rapid global environmental change, a pressing question in ecology is how organisms respond?


Daphnia. Photo by Per Harald Olsen/NTNU


Evolutionary changes and population dynamics
Empirical studies typically focus on direct ecological effects on phenotypes and population dynamics, or on evolutionary changes. Yet, it is becoming increasingly clear that feedback between evolutionary changes and population dynamics may substantially influence biological outcomes. Including such Eco-Evo feedback mechanisms between these two processes provides great promise in advancing understanding of evolutionary and ecological dynamics.

In our lab we are approaching these problems using Daphnia as a model organism. Daphnia are zooplankton that commonly dominate the freshwater grazing communities and hence have an important role in maintaining water quality. They also have several desirable biological characteristics such as clonal reproduction, short generation time, and a long history as model organisms in freshwater labs throughout the world.

Many of our studies focus on temperature effects, and focal phenotypic traits include metabolism, somatic growth, reproduction, feeding rates, growth efficiency, lipid storage, population growth rate and carrying capacity.

Our experimental facilities are conveniently located at Realfagbygget, and include a variety of instruments for quantification of phenotypes as well as a set of climate cabinets.

For an up-to-date peek at our activities click here

Density-dependent selection


Daphnia with fluorescing lipid droplets




Sigurd Eium

Sigurd Einum



Lab members


Centre for Biodiversity Dynamics at NTNU