King Penguin populations increase on South Georgia but explanations remain elusive

King Penguin populations increase on South Georgia but explanations remain elusive While dramatic increases in populations of King Penguins (Aptenodytes patagonicus) have been documented throughout their range, population changes on the island of South Georgia have not been assessed. We reconstructed time series of population size for six major colonies across South Georgia using historical data stretching back to 1883 and new population estimates derived from direct on-the-ground censuses and oblique, high-resolution digital photographs. We find evidence for a significant increase in the population of King Penguins at all colonies examined over the 124 years of available survey data. We discuss our findings in the context of four established hypotheses explaining King Penguin population growth: (1) favorable changes in the pelagic food web; (2) climate forcing; (3) greater availability of breeding habitat; and (4) the cessation of harvesting. While we do find evidence that glacial retreat may have increased suitable breeding habitat at some colonies and facilitated population expansion, glacial retreat is not associated with all of South Georgia’s growing populations. Local anomalies in sea surface temperature have increased in parallel with King Penguin population growth rate, suggesting that climate forcing may contribute to colony growth, but a complete explanation for the island’s rapidly growing King Penguin population remains unclear. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Polar Biology Springer Journals

King Penguin populations increase on South Georgia but explanations remain elusive

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Abstract

While dramatic increases in populations of King Penguins (Aptenodytes patagonicus) have been documented throughout their range, population changes on the island of South Georgia have not been assessed. We reconstructed time series of population size for six major colonies across South Georgia using historical data stretching back to 1883 and new population estimates derived from direct on-the-ground censuses and oblique, high-resolution digital photographs. We find evidence for a significant increase in the population of King Penguins at all colonies examined over the 124 years of available survey data. We discuss our findings in the context of four established hypotheses explaining King Penguin population growth: (1) favorable changes in the pelagic food web; (2) climate forcing; (3) greater availability of breeding habitat; and (4) the cessation of harvesting. While we do find evidence that glacial retreat may have increased suitable breeding habitat at some colonies and facilitated population expansion, glacial retreat is not associated with all of South Georgia’s growing populations. Local anomalies in sea surface temperature have increased in parallel with King Penguin population growth rate, suggesting that climate forcing may contribute to colony growth, but a complete explanation for the island’s rapidly growing King Penguin population remains unclear.

Journal

Polar Biology – Springer Journals

Published: Feb 9, 2018

References

  • Whaling stations in South Georgia
    Bannister, JL
  • Density estimation in wildlife surveys
    Bart, J; Droege, S; Geissler, P; Peterjohn, B; Ralph, CJ
  • The distribution, abundance and population trends of gentoo, rockhopper and king penguins in the Falkland Islands
    Bingham, M
  • Penguins as marine sentinels
    Boersma, PD
  • Penguins: natural history and conservation
    Bost, C-A; Delord, K; Barbraud, C; Cherel, Y; Pütz, K; Cotté, C; Péron, C; Weimerskirch, H
  • Biology of marine birds
    Bried, J; Jouventin, P
  • Further population growth in the Heard Island King Penguins
    Budd, GM
  • A method to assess population changes in King Penguins: the use of a geographical information system to estimate area-populations relationships
    Chamaillé-James, S; Guinet, C; Nicoleau, F; Argentier, M
  • Marine and terrestrial factors affecting Adélie Penguin Pygocelis adeliae chick growth and recruitment off the western Antarctic Peninsula
    Chapman, EW; Hofmann, EE; Patterson, DL; Ribic, CA; Fraser, WR
  • Important bird areas: South Georgia
    Clarke, A; Croxall, JP; Poncet, S; Martin, AR; Burton, R
  • Dispersal in the sub-Antarctic: King Penguins show remarkably little population genetic differentiation across their range
    Clucas, GV; Younger, JL; Kao, D; Rogers, AD; Handley, J; Miller, GD; Jouventin, P; Nolan, P; Gharbi, K; Miller, KJ; Hart, T
  • Patterns in the distribution of myctophid fish in the northern Scotia Sea ecosystem
    Collins, MA; Xavier, JC; Johnston, NM; North, AW; Enderlein, P; Tarling, GA; Waluda, CM; Hawker, EJ; Cunningham, NJ
  • Estimating population size in asynchronous aggregations: a Bayesian approach and test with elephant seal censuses
    Condit, R; Boeuf, B; Morris, PA; Sylvan, M
  • The breeding status of the King Penguin (Aptenodytes patagonicus)
    Conroy, JWH; White, MG
  • Climate change and Southern Ocean ecosystems I: how changes in physical habitats directly affect marine biota
    Constable, AJ
  • Glacial retreat on South Georgia and implications for the spread of rats
    Cook, AJ; Poncet, S; Paul, A; Cooper, R; Herbert, DJ; Christie, D
  • Ice core evidence for Antarctic Sea ice declines since the 1950s
    Curran, MAJ; Ommen, TD; Morgan, VI; Phillips, KL; Palmer, AS
  • Long-term trends in the population size of King Penguins at Crozet archipelago: environmental variability and density dependence?
    Delord, K; Barbraud, C; Weimerskirch, H
  • Marine birds on land: a review of plant biomass, species richness, and community composition in seabird colonies
    Ellis, JC
  • Estimating shorebird numbers at migration stopover sites
    Farmer, A; Durbain, F
  • Estimating nests not present at the time of breeding surveys: an important consideration in assessing nesting populations
    Frederick, PC; Heath, JA; Bennetts, R; Hafner, H
  • Recovery of the King Penguin, Aptenodytes-patagonicus, population on Heard Island
    Gales, R; Pemberton, D
  • Warming of the Southern Ocean Since the1950s
    Gille, ST
  • The Southern Ocean ecosystem under multiple climate change stresses—an integrated circumpolar assessment
    Gutt, J; Bertler, N; Bracegirdle, TJ; Buschmann, A; Comiso, J; Hosie, G; Isla, E; Schloss, IR; Smith, CR; Tournadre, J; Xavier, JC
  • The Island of South Georgia
    Headland, R
  • A compilation of parameters for ecosystem dynamics models of the Scotia Sea-Antarctic Peninsula region
    Hill, SL; Reid, K; Thorpe, SE; Hinke, J; Watters, GM
  • Detection of temperature and sea-ice extent changes in the Southern Ocean
    Jacka, TH; Budd, WF
  • Exploitation of pelagic resources by a non-flying seabird: satellite tracking of the King Penguin throughout the breeding cycle
    Jouventin, P; Capdeville, D; Cuenot-Chaillet, F; Boiteau, C
  • Further evidence of King Penguins’ breeding range extension in the South Shetland Islands?
    Juáres, MA; Negrete, J; Mennucci, JA; Perchivale, PJ; Santos, M; Moreira, E; Coria, NR
  • Breeding events of King Penguin at the South Shetland Islands: has it come to stay?
    Juáres, MA; Ferrer, F; Coria, NR; Santos, MM
  • Micronekton and macrozooplankton in the open waters near ice edge zones (AMERIEZ 1983 and 1986)
    Lancraft, TM; Torres, JJ; Hopkins, TL
  • Population increases of fur seals at South Georgia
    Laws, RM
  • The adaptive significance of crèches in the King Penguin
    LeBohec, C; Gauthier-Clerc, M; Maho, Y
  • King penguin population threatened by Southern Ocean warming
    LeBohec, C; Durant, JM; Gauthier-Clerc, M; Stenseth, NC; Park, Y-H; Pradel, R; Grémillet, D; Gendner, J-P; Maho, Y
  • The distribution and size of king penguin rookeries on South Georgia
    Lewis Smith, RI; Tallowin, JRB
  • Cruising in the South Atlantic
    Murphy, RC
  • Interannual variability of the South Georgia marine ecosystem: biological and physical sources of variation in the abundance of krill
    Murphy, EJ; Watkins, JL; Reid, K; Trathan, PN; Everson, I; Croxall, JP; Priddle, J; Brandon, MA; Brierley, AS; Hofmann, E
  • Diet of the King Penguin Aptenodytes patagonicus during three summers at South Georgia
    Olsson, O; North, AW
  • Prey composition and daily rations of myctophid fishes in the Southern Ocean
    Pakhomov, EA; Perissinotto, R; McQuaid, CD
  • New southerly breeding location of King Penguins (Aptenodytes patagonicus) on Elephant Island (Maritime Antarctic)
    Petry, MV; Basler, AB; Valls, FCL; Krüger, L
  • Visibility bias in aerial surveys: a review of estimation procedures
    Pollock, KH; Kendall, WL
  • A visitor’s guide to South Georgia
    Poncet, S; Crosbie, K
  • Community structure and feeding ecology of mesopelagic fish in the slope waters of King George Island (South Shetland Islands, Antarctica)
    Pusch, C; Hulley, PA; Kock, KH
  • Fatty acid evidence for the importance of myctophid fishes in the diet of King Penguins, Aptenodytes patagonicus
    Raclot, T; Groscolas, R; Cherel, Y
  • A complete breeding failure in an Adélie Penguin colony correlates with unusual and extreme environmental events
    Ropert-Courdert, Y; Kato, A; Meyer, X; Pellé, M; McIntosh, AJJ; Angelier, F; Chastel, O; Widmann, M; Arthur, B; Raymond, B; Raclot, T
  • Growth rate and recovery of a King Penguin, Aptenodytes patagonicus, population after exploitation
    Rounsevell, DE; Copson, GR
  • Predatory impact of the myctophid fish community on zooplankton in the Scotia Sea (Southern Ocean)
    Saunders, RA; Collins, MA; Ward, P; Stowasser, G; Hill, SL; Shreeve, R; Tarling, GA
  • Biologie Antarctique
    Sladen, WJL
  • Circumpolar structure and distribution of the Antarctic Circumpolar Current fronts 2: variability and relationship to sea surface height
    Sokolov, S; Rintoul, SR
  • Starting with a handicap: phenotypic differences between early- and late-born King Penguin chicks and their survival correlates
    Stier, A; Viblanc, VA; Massemin-Challet, S; Handrich, Y; Zahn, S; Rojas, ER; Saraux, C; Le Vaillant, M; Prud’homme, O; Grosbellet, E; Robin, J-P; Bize, P; Criscuolo, F
  • The King Penguin of South Georgia
    Stonehouse, B
  • The next 100 years in Antarctic climate change and the environment
    Summerhayes, C
  • South Georgia: an ecological atlas
  • Environmental forcing and Southern Ocean marine predator populations: effects of climate change and variability
    Trathan, P; Forcada, J; Murphy, E
  • Linear tracks and restricted temperature ranges characterise penguin foraging pathways
    Trathan, PN; Bishop, C; Maclean, G; Brown, P; Fleming, A; Collins, MA
  • King penguin demography since the last glaciation inferred from genome-wide data
    Trucchi, E; Gratton, P; Whittington, JD; Cristofari, R; Maho, Y; Stenseth, N; LeBohec, C
  • The SCAR READER project: toward a high-quality database of mean Antarctic meteorological observations
    Turner, J; Colwell, SR; Marshall, GJ; Lachlan-Cope, TA; Carleton, AM; Jones, PD; Lagun, V; Reid, PA; Iagovkina, S
  • Antarctic climate change and the environment: an update
    Turner, J; Barrand, NE; Bracegirdle, TJ; Convey, P; Hodgson, DA; Jarvis, M; Jenkins, A; Marshall, G; Meredith, MP; Roscoe, H; Shanklin, J; French, J; Goosse, H; Guglielmin, M; Gutt, J; Jacobs, S; Kennicutt, MC; Masson-Delmotte, V; Mayewski, P; Navarro, F; Robinson, SA; Scambos, T; Sparrow, M; Summerhayes, C; Speer, K; Klepikov, A
  • Tipping back the balance: recolonization of the Macquarie Island isthmus by King Penguins (Aptenodytes patagonicus) following extermination for human gain
    Hoff, J; McMahon, CR; Field, I
  • The breeding biology and population dynamics of King Penguins Aptenodytes patagonica on the Crozet Islands
    Weimerskirch, H; Stahl, JC; Jouventin, P
  • Rapid warming of the ocean around South Georgia, Southern Ocean, during the 20th century: forcings, characteristics and implications for lower trophic levels
    Whitehouse, MJ; Meredith, MP; Rothery, P; Atkinson, A; Ward, P; Korb, RE
  • The potential impact of a krill fishery upon pelagic fish in the Prydz Bay area of Antarctica
    Williams, R
  • The status and trends of Antarctic and Sub-Antarctic seabirds
    Woehler, EJ; Croxall, JP
  • A statistical assessment of the status and trends of Antarctic and Sub-Antarctic seabirds
    Woehler, EJ; Cooper, J; Croxall, JP; Fraser, WR; Kooyman, GL; Miller, GD; Nel, DC; Patterson, DL; Peter, H-U; Ribic, CA; Salwicka, K; Trivelpiece, WZ; Weimerskirch, H

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