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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11620/15:10295864

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

—

Projekt

<a href="/cs/project/GAP505%2F11%2F1617" target="_blank" >GAP505/11/1617: Funkční determinanty geografických gradientů v diverzitě ptáků subsaharské Afriky</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Global Ecology and Biogeography

ISSN

1466-822X

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

437-447

Kód UT WoS článku

000350997800006

EID výsledku v databázi Scopus

2-s2.0-84924011134