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Population trends of Adélie penguin (Pygoscelis adeliae) breeding colonies: a spatial analysis of the effects of snow accumulation and human activities

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Bricher, PK and Lucieer, A and Woehler, E (2008) Population trends of Adélie penguin (Pygoscelis adeliae) breeding colonies: a spatial analysis of the effects of snow accumulation and human activities. Polar Biology. ISSN 0722-4060 (Print) 1432-2056 (Online)

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Abstract

Abstract Many of the Adélie penguin colonies used for
long-term demographic studies are located near research
stations, and there is a need to disentangle the eVects of
human activities and environmental variability on Adélie
penguin population trends. This study used Geographic
Information Systems and decision trees to examine whether
potential changes in snow cover and/or proximity to human
activities were able to explain the varying population trends
of colonies at two breeding localities near Casey, East Antarctica.
At the less visited site, Whitney Pt, wind exposure
and snow accumulation correctly predicted the broad trends
of colonies in most (84%) instances, whereas at Shirley I
their predictive accuracy fell to 58%. At Shirley I, proximity
to human activity correctly predicted the broad trends
for 84% of colonies. While snow accumulation patterns are
a primary driver of variation in population trends among
colonies, the eVect of snow accumulation is outweighed by
proximity to human activities near Casey.

Item Type: Article
Keywords: Adélie · Penguin · Human · Snow · Spatial
Journal or Publication Title: Polar Biology
ISSN: 0722-4060 (Print) 1432-2056 (Online)
Identification Number - DOI: 10.1007/s00300-008-0479-z
Additional Information:

The original publication is available at www.springerlink.com

Date Deposited: 21 Jul 2008 00:17
Last Modified: 18 Nov 2014 03:44
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