Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin
Abstract 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 th...
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ftdoajarticles:oai:doaj.org/article:a408c38e4f83415ead04e917d8e2712f 2023-05-15T18:07:16+02:00 Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin Nicolás A. Lois Leonardo Campagna Ulises Balza Michael J. Polito Klemens Pütz Juliana A. Vianna Annick Morgenthaler Esteban Frere Ricardo Sáenz‐Samaniego Andrea Raya Rey Bettina Mahler 2020-04-01T00:00:00Z https://doi.org/10.1002/ece3.6127 https://doaj.org/article/a408c38e4f83415ead04e917d8e2712f EN eng Wiley https://doi.org/10.1002/ece3.6127 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.6127 https://doaj.org/article/a408c38e4f83415ead04e917d8e2712f Ecology and Evolution, Vol 10, Iss 7, Pp 3346-3355 (2020) ddRAD Eudyptes chrysocome population dynamics SIBER trophic niche Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.1002/ece3.6127 2022-12-31T06:53:13Z Abstract 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. Article in Journal/Newspaper Rockhopper penguin Directory of Open Access Journals: DOAJ Articles Patagonia Ecology and Evolution 10 7 3346 3355 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ddRAD Eudyptes chrysocome population dynamics SIBER trophic niche Ecology QH540-549.5 |
spellingShingle |
ddRAD Eudyptes chrysocome population dynamics SIBER trophic niche Ecology QH540-549.5 Nicolás A. Lois Leonardo Campagna Ulises Balza Michael J. Polito Klemens Pütz Juliana A. Vianna Annick Morgenthaler Esteban Frere Ricardo Sáenz‐Samaniego Andrea Raya Rey Bettina Mahler Metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin |
topic_facet |
ddRAD Eudyptes chrysocome population dynamics SIBER trophic niche Ecology QH540-549.5 |
description |
Abstract 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 |
Article in Journal/Newspaper |
author |
Nicolás A. Lois Leonardo Campagna Ulises Balza Michael J. Polito Klemens Pütz Juliana A. Vianna Annick Morgenthaler Esteban Frere Ricardo Sáenz‐Samaniego Andrea Raya Rey Bettina Mahler |
author_facet |
Nicolás A. Lois Leonardo Campagna Ulises Balza Michael J. Polito Klemens Pütz Juliana A. Vianna Annick Morgenthaler Esteban Frere Ricardo Sáenz‐Samaniego Andrea Raya Rey Bettina Mahler |
author_sort |
Nicolás A. Lois |
title |
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_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_sort |
metapopulation dynamics and foraging plasticity in a highly vagile seabird, the southern rockhopper penguin |
publisher |
Wiley |
publishDate |
2020 |
url |
https://doi.org/10.1002/ece3.6127 https://doaj.org/article/a408c38e4f83415ead04e917d8e2712f |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Rockhopper penguin |
genre_facet |
Rockhopper penguin |
op_source |
Ecology and Evolution, Vol 10, Iss 7, Pp 3346-3355 (2020) |
op_relation |
https://doi.org/10.1002/ece3.6127 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.6127 https://doaj.org/article/a408c38e4f83415ead04e917d8e2712f |
op_doi |
https://doi.org/10.1002/ece3.6127 |
container_title |
Ecology and Evolution |
container_volume |
10 |
container_issue |
7 |
container_start_page |
3346 |
op_container_end_page |
3355 |
_version_ |
1766179249912283136 |