Pygoscelid penguins breeding distribution and population trends at Lions Rump rookery, King George Island

Korczak−Abshire, Małgorzata; Węgrzyn, Michał; Angiel, Piotr J.; Lisowska, Maja

doi:10.2478/popore-2013-0002

Cited by 14 publications

(22 citation statements)

References 30 publications

(40 reference statements)

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“…This result reflects the trends in populations from different localities on King George Island (e.g., Chwedorzewska and Korczak 2010;Korczak-Abshire et al 2013;Braun et al 2017;Sierakowski et al 2017;Znój et al 2017) as well as trends in the whole Antarctic Peninsula region (e.g., Hinke et al 2007;Lynch et al 2012;Lyver et al 2014). Moreover, some authors suggest that further reductions in the icedependent Adélies population are likely if the frequent climate anomalous events continue (Ainley et al 2010;Hinke et al 2017).…”

Section: Resultsmentioning

confidence: 59%

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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Section: Resultsmentioning

confidence: 59%

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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“…Periglacial and denudation processes began to modify the landscape, further increasing glacier ablation. The intensified surface melting provided increased freshwater discharge from glacial rivers and delivered more suspended material to the near shore environment of King George Island, all of which affected the local ecosystems [49,50]. Our study results demonstrated that new ice-free areas were added at different rates during different periods, which must be taken into account when studying the influence of environmental changes on the maritime and land ecosystems.…”

Section: Discussionmentioning

confidence: 86%

Fluctuation of Glacial Retreat Rates in the Eastern Part of Warszawa Icefield, King George Island, Antarctica, 1979–2018

et al. 2018

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“…During that time, the Ad elie colony declined from a peak of roughly 9600 breeding pairs in 1988/1989 to a minimum of 2038 in 2012/2013, representing a nearly 79% decline in abundance. The magnitude of decline is commensurate with population trends at other Ad elie penguin colonies on King George Island (Sander et al 2007, Carlini et al 2009, Korczak-Abshire et al 2013) and throughout the northern Antarctic Peninsula region across a wide range of colony sizes (Lynch et al 2012).…”

Section: Study Sitementioning

confidence: 53%

“…, Korczak‐Abshire et al. ) and throughout the northern Antarctic Peninsula region across a wide range of colony sizes (Lynch et al. ).…”

Section: Methodsmentioning

confidence: 99%

Variable vital rates and the risk of population declines in Adélie penguins from the Antarctic Peninsula region

Hinke

Trivelpiece

2017

Ecosphere

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Abstract. Predicting population responses in changing environments is an important task for ecologists.In polar regions, climate warming, loss of sea ice, and more frequent anomalous events suggest that further reductions in ice-dependent animal populations are likely. We assess the risk of near-term (30-year) depletion of an Ad elie penguin (Pygoscelis adeliae) population with a stochastic matrix model parameterized with 30 yr of data from the Copacabana colony on King George Island, Antarctica. The model was fitted to nest census data by estimating correction factors for survival rates estimated from a multi-state mark-recapture model. We modeled future survival and fecundity scenarios during the projection period (2012-2041) based on a two-state Markov chain that randomly assigned survival rates and reproductive success from their respective historical distributions to represent "good" and "poor" years. Monte Carlo simulation was used to estimate population trajectories across a range of progressively worse survival conditions. The results suggest that, given historical distributions of survival and reproductive success, a limited scope for recovery of the population is present, commensurate with recent stabilization in population size at the study site. However, our projections mainly suggest that the Ad elie penguin population will decline if the frequency of years with poor survival remains at, or increases above, its 30-year mean. The risk of local depletion within 30 yr, defined according to International Union for Conservation of Nature categories for endangered and critically endangered species, was 33% for >90% declines, but near 100% for 50% declines given status-quo conditions. As survival conditions worsen, the risk of substantive depletions rose rapidly. Given expectations of further environmental and ecosystem changes in the northern Antarctic Peninsula region, continued declines in Ad elie penguin population size at the northern extent of their range should be expected.

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Pygoscelid penguins breeding distribution and population trends at Lions Rump rookery, King George Island

Cited by 14 publications

References 30 publications

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

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

Fluctuation of Glacial Retreat Rates in the Eastern Part of Warszawa Icefield, King George Island, Antarctica, 1979–2018

Variable vital rates and the risk of population declines in Adélie penguins from the Antarctic Peninsula region

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