Cargando…

Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin

Population connectivity is driven by individual dispersal potential and modulated by natal philopatry. In seabirds, high vagility facilitates dispersal yet philopatry is also common, with foraging area overlap often correlated with population connectivity. We assess the interplay between these proce...

Descripción completa

Detalles Bibliográficos
Autores principales: Lois, Nicolás A., Campagna, Leonardo, Balza, Ulises, Polito, Michael J., Pütz, Klemens, Vianna, Juliana A., Morgenthaler, Annick, Frere, Esteban, Sáenz‐Samaniego, Ricardo, Raya Rey, Andrea, Mahler, Bettina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7141044/
https://www.ncbi.nlm.nih.gov/pubmed/32273992
http://dx.doi.org/10.1002/ece3.6127
_version_ 1783519111507083264
author Lois, Nicolás A.
Campagna, Leonardo
Balza, Ulises
Polito, Michael J.
Pütz, Klemens
Vianna, Juliana A.
Morgenthaler, Annick
Frere, Esteban
Sáenz‐Samaniego, Ricardo
Raya Rey, Andrea
Mahler, Bettina
author_facet Lois, Nicolás A.
Campagna, Leonardo
Balza, Ulises
Polito, Michael J.
Pütz, Klemens
Vianna, Juliana A.
Morgenthaler, Annick
Frere, Esteban
Sáenz‐Samaniego, Ricardo
Raya Rey, Andrea
Mahler, Bettina
author_sort Lois, Nicolás A.
collection PubMed
description Population connectivity is driven by individual dispersal potential and modulated by natal philopatry. In seabirds, high vagility facilitates dispersal yet philopatry is also common, with foraging area overlap often correlated with population connectivity. We assess the interplay between these processes by studying past and current connectivity and foraging niche overlap among southern rockhopper penguin colonies of the coast of southern South America using genomic and stable isotope analyses. We found two distinct genetic clusters and detected low admixture between northern and southern colonies. Stable isotope analysis indicated niche variability between colonies, with Malvinas/Falklands colonies encompassing the species entire isotopic foraging niche, while the remaining colonies had smaller, nonoverlapping niches. A recently founded colony in continental Patagonia differed in isotopic niche width and position with Malvinas/Falklands colonies, its genetically identified founder population, suggesting the exploitation of novel foraging areas and/or prey items. Additionally, dispersing individuals found dead across the Patagonian shore in an unusual mortality event were also assigned to the northern cluster, suggesting northern individuals reach southern localities, but do not breed in these colonies. Facilitated by variability in foraging strategies, and especially during unfavorable conditions, the number of dispersing individuals may increase and enhance the probability of founding new colonies. Metapopulation demographic dynamics in seabirds should account for interannual variability in dispersal behavior and pay special attention to extreme climatic events, classically related to negative effects on population trends.
format Online
Article
Text
id pubmed-7141044
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-71410442020-04-09 Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin Lois, Nicolás A. Campagna, Leonardo Balza, Ulises Polito, Michael J. Pütz, Klemens Vianna, Juliana A. Morgenthaler, Annick Frere, Esteban Sáenz‐Samaniego, Ricardo Raya Rey, Andrea Mahler, Bettina Ecol Evol Original Research Population connectivity is driven by individual dispersal potential and modulated by natal philopatry. In seabirds, high vagility facilitates dispersal yet philopatry is also common, with foraging area overlap often correlated with population connectivity. We assess the interplay between these processes by studying past and current connectivity and foraging niche overlap among southern rockhopper penguin colonies of the coast of southern South America using genomic and stable isotope analyses. We found two distinct genetic clusters and detected low admixture between northern and southern colonies. Stable isotope analysis indicated niche variability between colonies, with Malvinas/Falklands colonies encompassing the species entire isotopic foraging niche, while the remaining colonies had smaller, nonoverlapping niches. A recently founded colony in continental Patagonia differed in isotopic niche width and position with Malvinas/Falklands colonies, its genetically identified founder population, suggesting the exploitation of novel foraging areas and/or prey items. Additionally, dispersing individuals found dead across the Patagonian shore in an unusual mortality event were also assigned to the northern cluster, suggesting northern individuals reach southern localities, but do not breed in these colonies. Facilitated by variability in foraging strategies, and especially during unfavorable conditions, the number of dispersing individuals may increase and enhance the probability of founding new colonies. Metapopulation demographic dynamics in seabirds should account for interannual variability in dispersal behavior and pay special attention to extreme climatic events, classically related to negative effects on population trends. John Wiley and Sons Inc. 2020-03-05 /pmc/articles/PMC7141044/ /pubmed/32273992 http://dx.doi.org/10.1002/ece3.6127 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Lois, Nicolás A.
Campagna, Leonardo
Balza, Ulises
Polito, Michael J.
Pütz, Klemens
Vianna, Juliana A.
Morgenthaler, Annick
Frere, Esteban
Sáenz‐Samaniego, Ricardo
Raya Rey, Andrea
Mahler, Bettina
Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title_full Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title_fullStr Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title_full_unstemmed Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title_short Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
title_sort metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7141044/
https://www.ncbi.nlm.nih.gov/pubmed/32273992
http://dx.doi.org/10.1002/ece3.6127
work_keys_str_mv AT loisnicolasa metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT campagnaleonardo metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT balzaulises metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT politomichaelj metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT putzklemens metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT viannajulianaa metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT morgenthalerannick metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT frereesteban metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT saenzsamaniegoricardo metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT rayareyandrea metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin
AT mahlerbettina metapopulationdynamicsandforagingplasticityinahighlyvagileseabirdthesouthernrockhopperpenguin