Synopsis: Adapting to habitat

Spatial variations can drive evolution in certain ecological habitats.

The complex relationship between ecology and evolution, sometimes ignored in biological models, is key in driving species adaptation in different environments. In a paper in Physical Review Letters, Rutger Hermsen and Terence Hwa, from the Center for Theoretical Biological Physics at the University of California, San Diego, propose a model that describes how evolution may be affected by the presence of spatial heterogeneities—location-dependent variations in the environment—in so-called source-sink ecologies, in which a species may only survive in a hostile environment (sink) after adaptation through a mutation. This model may mimic the emergence of insecticide resistance between plantations that use different types or amounts of insecticides, or bacteria migration between treated and untreated individuals.

One of the main findings in the paper is that, in general, the first adapted individual found in a hostile environment exhibits a mutation, which occurs prior to migration to the sink. This breakthrough may serve as a starting point for more realistic models where gradual environmental changes are allowed, and, in turn, to a better understanding of the development of infectious diseases or the emergence of antibiotic resistant pathogens. – Hernan D. Rozenfeld


Features

More Features »

Announcements

More Announcements »

Subject Areas

Soft MatterBiological PhysicsInterdisciplinary Physics

Previous Synopsis

Atomic and Molecular Physics

Progress toward an antihydrogen beam

Read More »

Next Synopsis

Soft Matter

Mechanical proteins

Read More »

Related Articles

Synopsis: Now You See Them, Now You Don’t
Soft Matter

Synopsis: Now You See Them, Now You Don’t

Whether topological defects form when a disk-shaped particle is placed in a liquid-crystal bath depends on the thickness of the particle. Read More »

Focus: Membrane Holes Can Shrink, Grow, or Stay Put
Soft Matter

Focus: Membrane Holes Can Shrink, Grow, or Stay Put

Pores in a polymer film do not change size over time if they have just the right diameter, according to experiments. Read More »

Focus: How Cells Remember Who They Are
Biological Physics

Focus: How Cells Remember Who They Are

A theoretical model of chromosome strands as polymers explains why chemical markers on genes can survive from one cell generation to the next. Read More »

More Articles