Functional role of the invasive European Starling, Sturnus vulgaris, in Argentina
Facundo X. Palacio A D , René E. Maragliano B and Diego Montalti C
+ Author Affiliations
- Author Affiliations
A Unidad Ejecutora Lillo-CONICET, Fundación Miguel Lillo, Miguel Lillo 251, T4000JFE-San Miguel de Tucumán, Tucumán, Argentina.
B Instituto de Formación Docente y Técnica N° 35, Amat 279, B1842, Monte Grande, Buenos Aires, Argentina.
C Sección Ornitología, División Zoología Vertebrados, Facultad de Ciencias Naturales y Museo-CONICET, Paseo del Bosque s/n, B1900FWA–La Plata, Buenos Aires, Argentina.
D Corresponding author. Email: facundo_palacio@yahoo.com.ar
Emu 116(4) 387-393 https://doi.org/10.1071/MU16021
Submitted: 3 November 2015 Accepted: 3 June 2016 Published: 12 July 2016
Abstract
The introduction of exotic species may have severe effects on native ecosystems by disrupting communities and ecosystem services. Consequently, assessing the functional role of a species newly added to a community is an important task in order to identify native species at risk. In Argentina, the ecology of the invasive European Starling (Sturnus vulgaris) is poorly known and studies addressing its ecological role in bird communities are still lacking. We assessed the functional role of the European Starling by sampling bird communities across four vegetation types (Solanum grassland, Cynodon grassland, flood plain and forest patches) and making comparisons of body mass, and dietary and foraging traits of European Starling with native and other introduced bird species in east-central Argentina. The European Starling was functionally most similar to two widespread, generalist native passerines – the Bay-winged Cowbird (Agelaioides badius) and the Chalk-browed Mockingbird (Mimus saturninus) – and to the invasive House Sparrow (Passer domesticus), which together defined a functional group of terrestrial and foliage omnivores. European Starlings were more abundant in Solanum grasslands than in other vegetation types and showed significant vegetation-type overlap with functionally similar species. Moreover, abundance of European Starlings was positively correlated with bird abundance and diversity. Our results identify native species that are functionally equivalent to European Starlings, and, consequently, potentially subject to ecological impacts.
Additional keywords: biodiversity, competition, foraging, invasive species.
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