Metapopulation

From EvoWiki

Introduction

A metapopulation a network of subpopulations isolated in habitat patches. The long-term persistence of the species depends on the local (patch) extinction and recolonization and on net gene flow between subpopulations. Metapopulation theory is of particular importance to conservation biologists attempting to understand the process of regional extinction and survival of species.

Conservation Concerns

Since metapopulations are continually changing in terms of patch number and density, often a single survey of population density will underestimate a species' true range. This has grave implications for conservation efforts, as a viable reserve usually must encompass a large proportion of patches as well as corridors to allow migration between patches. Other concerns such as drought refugia and edge effects must also play a role in reserve design.

Literature

1. Hunt, H. L. and R. E. Scheiblinga. 2000. Patch dynamics of mussels on rocky shores: integrating process to understand pattern. Ecology 82(11): 3213–3231. abstract

2. Pickett, S. T. A. and J. N. Thompson. 1978. Patch dynamics and the design of nature reserves. Biological Conservation 13: 27-37. pdf

3. Schramm, J. 2003. The Complex Interactions of Amphibians with a Patchy Environment. review, html

4. Verheyen, K. et. al. 2004. Metapopulation dynamics in changing landscapes: a new spatially realistic model for forest plants. Ecology 85(12): 3302–3312. pdf