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The influence of gene flow on population viability in an isolated urban caracal population.
Kyriazis, Christopher C; Serieys, Laurel E K; Bishop, Jacqueline M; Drouilly, Marine; Viljoen, Storme; Wayne, Robert K; Lohmueller, Kirk E.
Afiliación
  • Kyriazis CC; Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA.
  • Serieys LEK; Panthera, New York, New York, USA.
  • Bishop JM; Institute for Communities and Wildlife in Africa, Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa.
  • Drouilly M; The Cape Leopard Trust, Cape Town, South Africa.
  • Viljoen S; Institute for Communities and Wildlife in Africa, Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa.
  • Wayne RK; Panthera, New York, New York, USA.
  • Lohmueller KE; Institute for Communities and Wildlife in Africa, Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa.
Mol Ecol ; 33(9): e17346, 2024 May.
Article en En | MEDLINE | ID: mdl-38581173
ABSTRACT
Wildlife populations are becoming increasingly fragmented by anthropogenic development. Small and isolated populations often face an elevated risk of extinction, in part due to inbreeding depression. Here, we examine the genomic consequences of urbanization in a caracal (Caracal caracal) population that has become isolated in the Cape Peninsula region of the City of Cape Town, South Africa, and is thought to number ~50 individuals. We document low levels of migration into the population over the past ~75 years, with an estimated rate of 1.3 effective migrants per generation. As a consequence of this isolation and small population size, levels of inbreeding are elevated in the contemporary Cape Peninsula population (mean FROH = 0.20). Inbreeding primarily manifests as long runs of homozygosity >10 Mb, consistent with the effects of isolation due to the rapid recent growth of Cape Town. To explore how reduced migration and elevated inbreeding may impact future population dynamics, we parameterized an eco-evolutionary simulation model. We find that if migration rates do not change in the future, the population is expected to decline, though with a low projected risk of extinction. However, if migration rates decline or anthropogenic mortality rates increase, the potential risk of extinction is greatly elevated. To avert a population decline, we suggest that translocating migrants into the Cape Peninsula to initiate a genetic rescue may be warranted in the near future. Our analysis highlights the utility of genomic datasets coupled with computational simulation models for investigating the influence of gene flow on population viability.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dinámica Poblacional / Flujo Génico / Genética de Población / Endogamia Límite: Animals País/Región como asunto: Africa Idioma: En Revista: Mol Ecol Asunto de la revista: BIOLOGIA MOLECULAR / SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dinámica Poblacional / Flujo Génico / Genética de Población / Endogamia Límite: Animals País/Región como asunto: Africa Idioma: En Revista: Mol Ecol Asunto de la revista: BIOLOGIA MOLECULAR / SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido