BaetaBelisleGarant2012

Référence

Baeta, R., Belisle, M. and Garant, D. (2012) Agricultural intensification exacerbates female-biased primary brood sex-ratio in tree swallows. Landscape Ecology, 27(10):1395-1405. (Scopus )

Résumé

Impacts of agriculture practices are documented at every ecosystem level from landscape structure to biodiversity. Birds are especially affected by agricultural modifications as shown by the decline of farmland species in Europe and North America. Few studies have assessed the effects of such modifications on individual characteristics directly influencing population dynamics. Several bird studies showed that sex-ratio may be adaptive and that mother condition affects the production of sons and daughters. However, little is known about the connections between environmental and individual characteristics on sex allocation. Here we quantified the variation in primary sex-ratio in tree swallows (Tachycineta bicolor) nesting in contrasted environments associated with agricultural intensification in southern Québec, Canada. We found that intensive agricultural practices affected female sex-ratio allocation in this area, resulting in more biased sex-ratio towards daughters throughout most of the hatching period. Yet, this bias towards daughters was reduced as the season progressed in the most intensively cultivated areas, suggesting that tree swallows have problems foreseeing the difficult growth and postfledging conditions that their nestlings will experience in such environments. Our results thereby support the hypothesis that intensive agricultural areas act as an ecological trap in our study system. We also found that effects of agricultural intensification on sex allocation differed among years and affected the relationships between sex-ratio allocation and hatching date. Our results suggest that agricultural intensification modifies female sex allocation in tree swallows, but the importance of the effects might vary among years and depend on timing of breeding. © 2012 Springer Science+Business Media B.V.

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@ARTICLE { BaetaBelisleGarant2012,
    AUTHOR = { Baeta, R. and Belisle, M. and Garant, D. },
    TITLE = { Agricultural intensification exacerbates female-biased primary brood sex-ratio in tree swallows },
    JOURNAL = { Landscape Ecology },
    YEAR = { 2012 },
    VOLUME = { 27 },
    PAGES = { 1395-1405 },
    NUMBER = { 10 },
    ABSTRACT = { Impacts of agriculture practices are documented at every ecosystem level from landscape structure to biodiversity. Birds are especially affected by agricultural modifications as shown by the decline of farmland species in Europe and North America. Few studies have assessed the effects of such modifications on individual characteristics directly influencing population dynamics. Several bird studies showed that sex-ratio may be adaptive and that mother condition affects the production of sons and daughters. However, little is known about the connections between environmental and individual characteristics on sex allocation. Here we quantified the variation in primary sex-ratio in tree swallows (Tachycineta bicolor) nesting in contrasted environments associated with agricultural intensification in southern Québec, Canada. We found that intensive agricultural practices affected female sex-ratio allocation in this area, resulting in more biased sex-ratio towards daughters throughout most of the hatching period. Yet, this bias towards daughters was reduced as the season progressed in the most intensively cultivated areas, suggesting that tree swallows have problems foreseeing the difficult growth and postfledging conditions that their nestlings will experience in such environments. Our results thereby support the hypothesis that intensive agricultural areas act as an ecological trap in our study system. We also found that effects of agricultural intensification on sex allocation differed among years and affected the relationships between sex-ratio allocation and hatching date. Our results suggest that agricultural intensification modifies female sex allocation in tree swallows, but the importance of the effects might vary among years and depend on timing of breeding. © 2012 Springer Science+Business Media B.V. },
    COMMENT = { Export Date: 20 February 2013 Source: Scopus CODEN: LAECE doi: 10.1007/s10980-012-9785-5 },
    ISSN = { 09212973 (ISSN) },
    KEYWORDS = { Agriculture, Environmental change, Landscape structure, Phenology, Primary sex-ratio, Tachycineta bicolor, agricultural intensification, agricultural practice, ecological impact, environmental change, environmental conditions, female, hatching date, landscape structure, nest site, passerine, phenology, population decline, sex allocation, sex ratio, Canada, Quebec [Canada], Aves, Tachycineta, Tachycineta bicolor },
    OWNER = { Luc },
    TIMESTAMP = { 2013.02.20 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84868600767&partnerID=40&md5=4edd4a0e74924c8a56d3bbc5ba09be49 },
}

********************************************************** ***************** Facebook Twitter *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ************* Écoles d'été et formation **************************** **********************************************************

Écoles d'été et formations

Cours aux cycles supérieurs: Terrain avancé en géographie 
10-15 juin 2019, FERLD, Abitibi-Témiscamingue
École d'été « Drones et télédétection environnementale » 
13-14 juin 2019, Sherbrooke
Ecole d'été en Biologie et Ecologie intégratives 
6-12 juillet 2019, Pyrénées françaises
École d'été en modélisation de la biodiversité 
19-23 août 2019, Orford
Cours aux cycles supérieurs: Aménagement des écosystèmes forestiers 
19-30 août 2019, Station FERLD

********************************************************** ***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

Jérémie Alluard (2016) Les statistiques au moments de la rédaction 

  • Ce document a pour but de guider les étudiants à intégrer de manière appropriée une analyse statistique dans leur rapport de recherche.

Voir les autres...