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Sources and sinks in population biology

Identifieur interne : 000431 ( France/Analysis ); précédent : 000430; suivant : 000432

Sources and sinks in population biology

Auteurs : Paula C. Dias [France]

Source :

RBID : ISTEX:B6B814D445FB36F8F16FE1AC671CE348B2264E73

Descripteurs français

English descriptors

Abstract

Abstract: The various habitats inhabited by a given species are never of the same quality. When demographic models take into account this habitat heterogeneity, the source-sink concept naturally emerges: a local demographic surplus arises in good quality habitats (source), and a local demographic deficit occurs in habitats of poor quality (sink). Within a landscape, a permanent migration of propagules or individuals from source to sink habitats may lead to a stabilization of the overall demographic system. This simple situation, explored in the recent literature, has surprising properties. In particular, it requires a change in our view of classical concepts such as ecological niche and carrying capacity, it can explain the existence and persistence of local maladaptation and it can improve conservation practice.

Url:
DOI: 10.1016/0169-5347(96)10037-9


Affiliations:


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ISTEX:B6B814D445FB36F8F16FE1AC671CE348B2264E73

Le document en format XML

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<term>Oscar gaggiotti</term>
<term>Passive dispersal</term>
<term>Patchy environment</term>
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<term>Population counts</term>
<term>Population dynamics</term>
<term>Population size</term>
<term>Rain forest</term>
<term>Recent research</term>
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<div type="abstract" xml:lang="en">Abstract: The various habitats inhabited by a given species are never of the same quality. When demographic models take into account this habitat heterogeneity, the source-sink concept naturally emerges: a local demographic surplus arises in good quality habitats (source), and a local demographic deficit occurs in habitats of poor quality (sink). Within a landscape, a permanent migration of propagules or individuals from source to sink habitats may lead to a stabilization of the overall demographic system. This simple situation, explored in the recent literature, has surprising properties. In particular, it requires a change in our view of classical concepts such as ecological niche and carrying capacity, it can explain the existence and persistence of local maladaptation and it can improve conservation practice.</div>
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