The University of Southampton
University of Southampton Institutional Repository

Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc

Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc
Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc

Climate change, fisheries' pressure on penguin prey, and direct human disturbance of wildlife have all been implicated in causing large shifts in the abundance and distribution of penguins in the Southern Ocean. Without mark-recapture studies, understanding how colonies form and, by extension, how ranges shift is challenging. Genetic studies, particularly focused on newly established colonies, provide a snapshot of colonization and can reveal the extent to which shifts in abundance and occupancy result from changes in demographic rates (e.g., reproduction and survival) or migration among suitable patches of habitat. Here, we describe the population structure of a colonial seabird breeding across a large latitudinal range in the Southern Ocean. Using multilocus microsatellite genotype data from 510 Gentoo penguin (Pygoscelis papua) individuals from 14 colonies along the Scotia Arc and Antarctic Peninsula, together with mitochondrial DNA data, we find strong genetic differentiation between colonies north and south of the Polar Front, that coincides geographically with the taxonomic boundary separating the subspecies P. p. papua and P. p. ellsworthii. Using a discrete Bayesian phylogeographic approach, we show that southern Gentoos expanded from a possible glacial refuge in the center of their current range, colonizing regions to the north and south through rare, long-distance dispersal. Our findings show that this dispersal is important for new colony foundation and range expansion in a seabird species that ordinarily exhibits high levels of natal philopatry, though persistent oceanographic features serve as barriers to movement.
1834-1853
Levy, Hila
706757f3-1c20-448d-ae44-685fb805ce82
Clucas, Gemma V.
01c99eb2-5dbb-4f55-847c-1283065b40e1
Rogers, Alex D.
fb474198-f059-48f7-b637-74617b5023f6
Leaché, Adam D.
e208bb4f-aa45-4ccb-a6b7-3f6f464b32b1
Ciborowski, Kate L.
7a3a2207-67b6-469b-b399-84eed35bac4e
Polito, Michael J.
0ca8084c-6c7c-4d3e-afbc-4240d1f5cab8
Lynch, Heather J.
045997dc-e132-4d97-a2af-b715ad5a68b7
Dunn, Michael J.
0bcb6aec-1d9c-4891-b07b-0358628237a9
Hart, Tom
de3eadf1-5833-4bdd-ba26-c608ed0eb206
Levy, Hila
706757f3-1c20-448d-ae44-685fb805ce82
Clucas, Gemma V.
01c99eb2-5dbb-4f55-847c-1283065b40e1
Rogers, Alex D.
fb474198-f059-48f7-b637-74617b5023f6
Leaché, Adam D.
e208bb4f-aa45-4ccb-a6b7-3f6f464b32b1
Ciborowski, Kate L.
7a3a2207-67b6-469b-b399-84eed35bac4e
Polito, Michael J.
0ca8084c-6c7c-4d3e-afbc-4240d1f5cab8
Lynch, Heather J.
045997dc-e132-4d97-a2af-b715ad5a68b7
Dunn, Michael J.
0bcb6aec-1d9c-4891-b07b-0358628237a9
Hart, Tom
de3eadf1-5833-4bdd-ba26-c608ed0eb206

Levy, Hila, Clucas, Gemma V., Rogers, Alex D., Leaché, Adam D., Ciborowski, Kate L., Polito, Michael J., Lynch, Heather J., Dunn, Michael J. and Hart, Tom (2016) Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc. Ecology and Evolution, 6 (6), 1834-1853. (doi:10.1002/ece3.1929).

Record type: Article

Abstract


Climate change, fisheries' pressure on penguin prey, and direct human disturbance of wildlife have all been implicated in causing large shifts in the abundance and distribution of penguins in the Southern Ocean. Without mark-recapture studies, understanding how colonies form and, by extension, how ranges shift is challenging. Genetic studies, particularly focused on newly established colonies, provide a snapshot of colonization and can reveal the extent to which shifts in abundance and occupancy result from changes in demographic rates (e.g., reproduction and survival) or migration among suitable patches of habitat. Here, we describe the population structure of a colonial seabird breeding across a large latitudinal range in the Southern Ocean. Using multilocus microsatellite genotype data from 510 Gentoo penguin (Pygoscelis papua) individuals from 14 colonies along the Scotia Arc and Antarctic Peninsula, together with mitochondrial DNA data, we find strong genetic differentiation between colonies north and south of the Polar Front, that coincides geographically with the taxonomic boundary separating the subspecies P. p. papua and P. p. ellsworthii. Using a discrete Bayesian phylogeographic approach, we show that southern Gentoos expanded from a possible glacial refuge in the center of their current range, colonizing regions to the north and south through rare, long-distance dispersal. Our findings show that this dispersal is important for new colony foundation and range expansion in a seabird species that ordinarily exhibits high levels of natal philopatry, though persistent oceanographic features serve as barriers to movement.

Text
Levy_et_al-2016-Ecology_and_Evolution.pdf - Version of Record
Available under License Creative Commons Attribution.
Download (1MB)

More information

Accepted/In Press date: 10 December 2015
Published date: 15 March 2016
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 393830
URI: http://eprints.soton.ac.uk/id/eprint/393830
PURE UUID: 69d6cf2f-b475-4151-875e-85a5f5960962
ORCID for Gemma V. Clucas: ORCID iD orcid.org/0000-0002-4305-1719

Catalogue record

Date deposited: 05 May 2016 13:19
Last modified: 08 Jan 2022 00:47

Export record

Altmetrics

Contributors

Author: Hila Levy
Author: Gemma V. Clucas ORCID iD
Author: Alex D. Rogers
Author: Adam D. Leaché
Author: Kate L. Ciborowski
Author: Michael J. Polito
Author: Heather J. Lynch
Author: Michael J. Dunn
Author: Tom Hart

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×