| Authors: |
Laurent Lehmann
and Nicolas Perrin
|
| URL: |
http://dx.doi.org/10.1890%2F0012-9658%282006%2987%5B1844%3AOMRTDA%5D2.0.CO%3B2 |
| Description: |
may be interesting for fragmentation |
| Tags: |
Cricetus_cricetus
SPOM
biodiversity
connectivity
eigenvalue_effective_size
fragmentation
landscape
matrix_analysis
metapopulation
stochastic_patch_occupancy_model
|
| Abstract: |
The spatial configuration of metapopulations (numbers, sizes, and
localization of patches) affects their ability to resist demographic
extinction and genetic drift, but sometimes with opposite effects.
Small and isolated patches, for instance, contribute marginally to
demography but may play a large role in genetics by maintaining a
sizeable amount of genetic variance among demes. In source–sink
systems, similarly, connectivity may be beneficial in terms of effective
size, but detrimental in terms of survival, by lowering the reproductive
value of source populations. How to reconcile these opposite effects?
Here we propose an analytical framework that integrates fixation
time (ability to resist genetic drift) and extinction time (ability
to resist demographic extinction) into a single index of resistance,
measuring the ability of a metapopulation to maintain its demo-genetic
integrity. We then illustrate with numerical examples how conflicting
demands may be resolved. |
@article{Lehmann2006,
title = {ON METAPOPULATION RESISTANCE TO DRIFT AND EXTINCTION},
author = {Laurent Lehmann and Nicolas Perrin},
journal = {Ecology},
month = {July},
number = {7},
pages = {1844--1855},
url = {http://dx.doi.org/10.1890%2F0012-9658%282006%2987%5B1844%3AOMRTDA%5D2.0.CO%3B2},
volume = {87},
year = {2006},
description = {may be interesting for fragmentation},
abstract = {The spatial configuration of metapopulations (numbers, sizes, and
localization of patches) affects their ability to resist demographic
extinction and genetic drift, but sometimes with opposite effects.
Small and isolated patches, for instance, contribute marginally to
demography but may play a large role in genetics by maintaining a
sizeable amount of genetic variance among demes. In source–sink
systems, similarly, connectivity may be beneficial in terms of effective
size, but detrimental in terms of survival, by lowering the reproductive
value of source populations. How to reconcile these opposite effects?
Here we propose an analytical framework that integrates fixation
time (ability to resist genetic drift) and extinction time (ability
to resist demographic extinction) into a single index of resistance,
measuring the ability of a metapopulation to maintain its demo-genetic
integrity. We then illustrate with numerical examples how conflicting
demands may be resolved.},
timestamp = {2008.06.19}, file = {Lehmann2006.pdf:Lehmann2006.pdf:PDF}, owner = {kej},
keywords = {Cricetus_cricetus SPOM biodiversity connectivity eigenvalue_effective_size fragmentation landscape matrix_analysis metapopulation stochastic_patch_occupancy_model }
}
::