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Distribution and Dispersion

Distribution and Dispersion

To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...

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Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

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Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

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Related Experiment Video

Updated: Apr 27, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Is dispersal neutral?

Winsor H Lowe¹, Mark A McPeek²

¹Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA.

Trends in Ecology & Evolution

|June 26, 2014

Summary

This summary is machine-generated.

Dispersal is often viewed as random, but individual traits influence it. Understanding trait-mediated dispersal is key to uncovering non-neutral community assembly drivers.

Keywords:

community ecology dispersal evolution gene flow population biology

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Area of Science:

Ecology
Evolutionary Biology
Community Ecology

Background:

Dispersal is a fundamental ecological process, yet it's often oversimplified as purely stochastic.
Current research often assumes 'neutral dispersal,' overlooking how individual traits and selection shape movement patterns.
This assumption limits our understanding of community assembly mechanisms.

Purpose of the Study:

To challenge the prevailing 'neutral dispersal' assumption in community ecology.
To highlight the importance of individual traits in mediating dispersal.
To advocate for integrating ecological and evolutionary perspectives on dispersal.

Main Methods:

Review of existing ecological and evolutionary theory on dispersal.
Analysis of empirical evidence demonstrating trait-mediated dispersal.
Conceptual framework for integrating dispersal traits into community assembly research.

Main Results:

Dispersal is demonstrably influenced by species-specific traits and is subject to natural selection.
The 'neutral dispersal' assumption is theoretically and empirically questionable.
Individual traits play a significant role in ecological and evolutionary outcomes of dispersal.

Conclusions:

Community assembly is shaped by non-neutral processes, including trait-mediated dispersal.
Future research must empirically link ecological and evolutionary forces to dispersal.
A nuanced understanding of dispersal is essential for advancing community ecology and conservation.