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

Content Provider	Springer Nature Link
Author	Si Bachir, Abdelkrim Chenchouni, Haroun Djeddou, Nawel Barbraud, Christophe Céréghi, Régis Santoul, Fréderic
Copyright Year	2012
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. Welche Umweltfaktoren regulieren Koloniegröße und Bruterfolg beim Weißstorch Ciconia ciconia ?—der Einsatz von Selbstorganisierenden Karten Untersucht wurden Unterschiede in Brutkoloniestärke und Bruterfolg bei Weißstörchen Ciconia ciconia in Nordostalgerien, in den Jahren von 2006–2008. Jede Kolonie wurde anhand von zwölf Umweltvariablen charakterisiert, welche Auskunft über physische Umweltbedingungen, Landbedeckung und menschlichen Einfluss gaben, sowie anhand von drei demografischen Parametern: der Anzahl der Brutpaare, der Anzahl von Paaren mit Küken und der Anzahl flügger Junge pro Paar. Es wurden Generalisierte Lineare Gemischte Modelle und der Selbstorganisierende Karten-Algorithmus (Self-Organising Map, SOM, ein neuronales Netz) angewendet, um die Wirkung biotischer, abiotischer und anthropogener Faktoren auf die demografischen Parameter und die Beziehungen zwischen diesen zu untersuchen. Die Anzahl der Brutpaare und die der Paare mit Küken wurden von denselben (hauptsächlich anthropogenen) Umweltfaktoren beeinflusst. Dagegen wurde die Anzahl flügger Küken pro Paar von anderen Faktoren bestimmt: Weder die Koloniegröße noch die Anzahl von Nestern mit Küken hatten hier einen Einfluss. Die Einteilung der Umweltvariablen in natürliche und anthropogen bedingte half in Verbindung mit demografischen Parametern dabei, die Faktoren zu identifizieren, welche die Variation in Koloniegröße und den Brutparametern erklären. Die SOM-Methode erwies sich als geeignetes Werkzeug zur Beschreibung der tatsächlichen Dynamik in Weißstorch-Kolonien und stellt somit eine Hilfe bei der Festlegung effektiver Schutzmaßnahmen auf regionaler Ebene dar.
Starting Page	481
Ending Page	489
Page Count	9
File Format	PDF
ISSN	21937192
Journal	Journal für Ornithologie
Volume Number	154
Issue Number	2
e-ISSN	21937206
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-12-13
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	White Stork Ciconia ciconia Algeria Breeding performance Colony site Conservation Zoology Animal Ecology Evolutionary Biology
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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

The effects of colony size interacting with extra food supply on the breeding success of the White Stork (Ciconia ciconia)

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

Two-fold increase in White Stork (Ciconia ciconia) population in Lithuania: a consequence of changing agriculture?

Nest-site fidelity and breeding success in White Stork Ciconia ciconia

Do males hatch first and dominate sex ratios in White Stork Ciconia ciconia chicks?

Shortening day length as a previously unrecognized selective pressure for early breeding in a bird with long parental care

The migration of the White Stork (Ciconia ciconia): a special case according to new data

Distribution Pattern, Nest-Tree Features and Breeding Performance of Population of the Black Stork, Ciconia nigra (Ciconiiformes, Ciconiidae), in Northwestern Serbia

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

Similar Documents

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

The effects of colony size interacting with extra food supply on the breeding success of the White Stork (Ciconia ciconia)

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

Two-fold increase in White Stork (Ciconia ciconia) population in Lithuania: a consequence of changing agriculture?

Nest-site fidelity and breeding success in White Stork Ciconia ciconia

Do males hatch first and dominate sex ratios in White Stork Ciconia ciconia chicks?

Shortening day length as a previously unrecognized selective pressure for early breeding in a bird with long parental care

The migration of the White Stork (Ciconia ciconia): a special case according to new data

Distribution Pattern, Nest-Tree Features and Breeding Performance of Population of the Black Stork, Ciconia nigra (Ciconiiformes, Ciconiidae), in Northwestern Serbia

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