Genetic structure of declining chinstrap penguin (Pygoscelis antarcticus) populations from South Shetland Islands (Antarctica)

Korczak−Abshire, Małgorzata; Chwedorzewska, Katarzyna J.; Wąsowicz, Paweł; Bednarek, Piotr Tomasz

doi:10.1007/s00300-012-1210-7

Cited by 16 publications

(19 citation statements)

References 52 publications

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“…All population analyses agreed that there is high connectivity between King George Island, Orne Harbour, and Signy Island breeding colonies, complementing previous genetic work that found no differentiation within archipelagos (Korczak-Abshire et al 2012). The limited genetic structure detected can be explained by: (1) large effective population sizes of chinstrap colonies; (2) a recent population expansion; and (3) population intermixing through non-breeding dispersal.…”

Section: Regional Population Connectivitysupporting

confidence: 67%

“…For chinstrap penguins, there has not been a region-wide investigation using microsatellite markers. Korczak-Abshire et al (2012) found no evidence of differentiation between colonies within the South Shetland Islands based on nuclear anonymous amplified fragment length polymorphism (AFLP) markers, but this was over a very short distance of 32 km. There thus remains the possibility that population structuring exists between archipelagos.…”

Section: Introductionmentioning

confidence: 88%

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Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula

et al. 2015

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Section: Regional Population Connectivitysupporting

confidence: 67%

Section: Introductionmentioning

confidence: 88%

Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula

et al. 2015

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“…It is important to note here that we are investigating population structure at the regional, not the local scale. At the local scale, where colonies are separated by tens of kilometers or are within the same archipelago, we would not expect to find population structure as members of all three of these species have been observed visiting nearby colonies at low rates19252627 and chinstrap penguins lack population structure at these scales28. Changes in the local conditions, such as increased sea ice or ice-bergs which block access to colonies, has been found to increase the chances of individual Adélie penguins visiting nearby colonies25.…”

Section: Discussionmentioning

confidence: 94%

A reversal of fortunes: climate change ‘winners’ and ‘losers’ in Antarctic Peninsula penguins

Clucas

Dünn

Dyke

et al. 2014

Sci Rep

145

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Climate change is a major threat to global biodiversity. Antarctic ecosystems are no exception. Investigating past species responses to climatic events can distinguish natural from anthropogenic impacts. Climate change produces ‘winners’, species that benefit from these events and ‘losers’, species that decline or become extinct. Using molecular techniques, we assess the demographic history and population structure of Pygoscelis penguins in the Scotia Arc related to climate warming after the Last Glacial Maximum (LGM). All three pygoscelid penguins responded positively to post-LGM warming by expanding from glacial refugia, with those breeding at higher latitudes expanding most. Northern (Pygoscelis papua papua) and Southern (Pygoscelis papua ellsworthii) gentoo sub-species likely diverged during the LGM. Comparing historical responses with the literature on current trends, we see Southern gentoo penguins are responding to current warming as they did during post-LGM warming, expanding their range southwards. Conversely, Adélie and chinstrap penguins are experiencing a ‘reversal of fortunes’ as they are now declining in the Antarctic Peninsula, the opposite of their response to post-LGM warming. This suggests current climate warming has decoupled historic population responses in the Antarctic Peninsula, favoring generalist gentoo penguins as climate change ‘winners’, while Adélie and chinstrap penguins have become climate change ‘losers’.

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“…Until 2015, the Penguin I site qualified as an Important Bird Area (Harris et al 2015). Studies of Penguin I fauna were reported by Sladen et al (1968), Croxall and Kirkwood (1979), Jabłoński ( , 1984, Trivelpiece et al (1987), Shuford and Spear (1988), Pereira et al (1990), Naveen et al (2000) Pfeiffer and Peter (2004), Sander et al (2007) and Korczak-Abshire et al (2012). The latest information on the fauna inventory was recorded in 2013 (Harris et al 2015).…”

Section: Introductionmentioning

confidence: 95%

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

et al. 2018

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An unmanned aerial vehicle (UAV) as an alternative to manned aircrafts is an excellent, less invasive, safe tool, especially in sensitive polar regions. Here we used a fixed-wing UAV to collect data on seabird and pinniped populations in hardly accessible Antarctic areas. The implementation of an auto-piloted UAV equipped with a digital camera (Canon EOS 700D, 35 mm f/2.0 lens) allowed us to collect high-quality material applicable to a quantitative analysis of the fauna populations. A successful photogrammetric mission, at an altitude of 550 m above sea level, was accomplished during one Beyond Visual Line of Sight flight above hard-to-access Penguin Island and Turret Point Oasis (King George Island). Obtained selected RGB images were processed to generate a panoramic image stitch with resolution of 0.07 m ground sampling distance. A total of 4290 (SD = 33.08) breeding individuals of two penguin species, Adélie (Pygoscelis adeliae) and chinstrap (Pygoscelis antarcticus), 426 (SD = 7.78) individuals of the southern elephant seal (Mirounga leonina) and 6 individuals of the Weddell seal (Leptonychotes weddellii) were identified in both study areas. Additionally, 222 (SD = 2.0) individuals of the southern giant petrel (Macronectes giganteus) and 76 (SD = 1.0) of the Antarctic shag (Phalacrocorax atriceps bransfieldensis) in the Turret Point area were recognized. The presented observations on the natural history of the investigated fauna together with the available literature may be useful in future research on population trends. A comparison with available historical data for both investigated areas suggests a decrease of 68.29% in both penguin species in the 1980-2016 period. The presented results confirmed that UAVs are useful for remote census work for Antarctic seabirds.

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Genetic structure of declining chinstrap penguin (Pygoscelis antarcticus) populations from South Shetland Islands (Antarctica)

Cited by 16 publications

References 52 publications

Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula

Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula

A reversal of fortunes: climate change ‘winners’ and ‘losers’ in Antarctic Peninsula penguins

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

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