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Using self-organizing maps to investigate environmental factors regulating colony size and breeding success of the White Stork (Ciconia ciconia)

Si Bachir, Abdelkrim and Chenchouni, Haroun and Djeddou, Nawel and Barbraud, Christophe and Céréghino, Régis and Santoul, Frédéric Using self-organizing maps to investigate environmental factors regulating colony size and breeding success of the White Stork (Ciconia ciconia). (2013) Journal of Ornithology, 154 (2). 481-489. ISSN 0021-8375

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Official URL: http://dx.doi.org/10.1007/s10336-012-0915-2

Abstract

We studied variations in the size of breeding colonies and in breeding performance of White Storks Ciconia ciconia in 2006–2008 in north-east Algeria. Each colony site was characterized using 12 environmental variables describing the physical environment, land-cover categories, and human activities, and by three demographic parameters: the number of breeding pairs, the number of pairs with chicks, and the number of fledged chicks per pair. Generalized linear mixed models and the self-organizing map algorithm (SOM, neural network) were used to investigate effects of biotic, abiotic, and anthropogenic factors on demographic parameters and on their relationships. Numbers of breeding pairs and of pairs with chicks were affected by the same environmental factors, mainly anthropogenic, which differed from those affecting the number of fledged chicks per pair. Numbers of fledged chicks per pair was not affected by colony size or by the number of nests with chicks. The categorization of the environmental variables into natural and anthropogenic, in connection with demographic parameters, was relevant to detect factors explaining variation in colony size and breeding parameters. The SOM proved a relevant tool to help determine actual dynamics in White Stork colonies, and thus to support effective conservation decisions at a regional scale.

Item Type:Article
Additional Information:Thanks to Springer verlag editor. The original PDF of the article can be found at Journal of Ornithology website : http://www.springer.com/life+sciences/animal+sciences/journal/10336
HAL Id:hal-00913174
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University Hadj Lakhdar Batna (ALGERIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Tebessa (ALGERIA)
Laboratory name:
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Deposited By: Régis Cereghino
Deposited On:03 Dec 2013 11:53

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