Relative food limitation drives geographic clutch size variation in South African passerines: a large-scale test of Ashmole's seasonality hypothesis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10295864" target="_blank" >RIV/00216208:11310/15:10295864 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11620/15:10295864
Result on the web
<a href="http://dx.doi.org/10.1111/geb.12261" target="_blank" >http://dx.doi.org/10.1111/geb.12261</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/geb.12261" target="_blank" >10.1111/geb.12261</a>

Result language
angličtina
Original language name
Relative food limitation drives geographic clutch size variation in South African passerines: a large-scale test of Ashmole's seasonality hypothesis
Original language description
We used a large-scale environmental gradient to test the effects of maximum resource availability and resource seasonality (estimated by the normalized difference vegetation index) on clutch size variation among local passerine assemblages (25 km x 25 kmgrid cells). The importance of maximum resource availability was distinguished from the importance of resource seasonality by using multivariate general additive models and by subsetting the data so that variation in one of these parameters was minimized. Spatial autocorrelation was controlled for by using spatial generalized least squares. Assemblage mean clutch size showed a hump-shaped relationship with maximum resource availability but an increase with resource seasonality. When the variation in maximum resource availability was fixed, clutch size increased with increasing seasonality, but it decreased with increasing maximum resource availability when we fixed the variation in seasonality. These results hold for all feeding guilds
Czech name
—
Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
—

Project
<a href="/en/project/GAP505%2F11%2F1617" target="_blank" >GAP505/11/1617: Functional determinants of geographical gradients in avian diversity in sub-Saharan Africa</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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