About: Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Geographic variation in avian clutch size is thought to be related to the variation in nest predation rate and food availability. We studied predation on artificial ground nests along a large-scale geographic gradient in South Africa, and calculated mean clutch sizes of birds occurring in atlas quadrates surrounding our study sites. Clutch sizes generally increased with increasing productivity and seasonality. The least productive desert site was characterised also by the highest predation rate, whereas all the other sites located in savannas revealed much lower and more or less constant predation rate. We found no evidence for relationship between nest predation rates and clutch sizes of ground-nesting birds. This indicates that food availability is the major factor responsible for geographical variation in bird clutch sizes across South Africa, though high predation rate might also contribute to low clutch size in least productive arid environments. Geographic variation in avian clutch size is thought to be related to the variation in nest predation rate and food availability. We studied predation on artificial ground nests along a large-scale geographic gradient in South Africa, and calculated mean clutch sizes of birds occurring in atlas quadrates surrounding our study sites. Clutch sizes generally increased with increasing productivity and seasonality. The least productive desert site was characterised also by the highest predation rate, whereas all the other sites located in savannas revealed much lower and more or less constant predation rate. We found no evidence for relationship between nest predation rates and clutch sizes of ground-nesting birds. This indicates that food availability is the major factor responsible for geographical variation in bird clutch sizes across South Africa, though high predation rate might also contribute to low clutch size in least productive arid environments. (en)
Title	Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa (en)
skos:prefLabel	Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa (en)
skos:notation	RIV/68081766:_____/11:00369550!RIV12-AV0-68081766
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GAP505/11/1617), P(IAA601970801), P(LC06073), S, Z(AV0Z60930519), Z(MSM0021620828)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Albrecht, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav biologie obratlovců AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	201107
http://linked.open...ai/riv/idVysledku	RIV/68081766:_____/11:00369550
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	home-range size; Passerine birds; hypothesis; edge; community; forest; sites (en)
http://linked.open.../riv/klicoveSlovo	community Passerine birds edge home-range size sites forest hypothesis
http://linked.open...odStatuVydavatele	ZA - Jihoafrická republika
http://linked.open...ontrolniKodProRIV	[98B536CD7CBB]
http://linked.open...i/riv/nazevZdroje	Ostrich
http://linked.open...in/vavai/riv/obor	EG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Functional determinants of geographical gradients in avian diversity in sub-Saharan Africa Spatial biodiversity patterns: role of energy, environmental heterogeneity, population sizes and phylogeny Biodiversity Research Center
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	82
http://linked.open...iv/tvurceVysledku	Albrecht, Tomáš Ferenc, M. Hořák, D. Jelínek, V. Sedláček, O. Storch, D. Tószögyová, A.
http://linked.open...ain/vavai/riv/wos	000299427600003
http://linked.open...n/vavai/riv/zamer	Biodiverzita a ekologie obratlovců: Strategie ochrany a využívání přírodních populací Ekologické procesy v evoluci modelových skupin organismů
issn	0030-6525
number of pages	14 (xsd:int)
http://bibframe.org/vocab/doi	10.2989/00306525.2011.607863

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