Functional Traits, Flocking Propensity, and Perceived Predation Risk in an Amazonian Understory Bird Community.
Am Nat
; 187(5): 607-19, 2016 May.
Article
en En
| MEDLINE
| ID: mdl-27104993
ABSTRACT
Within a community, different species might share similar predation risks, and, thus, the ability of species to signal and interpret heterospecific threat information may determine species' associations. We combined observational, experimental, and phylogenetic approaches to determine the extent to which evolutionary history and functional traits determined flocking propensity and perceived predation risk (response to heterospecific alarm calls) in a lowland Amazonian bird community. We predicted that small birds that feed myopically and out in the open would have higher flocking propensities and account for a higher proportion of positive responses to alarms. Using generalized linear models and the incorporation of phylogeny on data from 56 species, our results suggest that phylogenetic relationships alongside body size, foraging height, vegetation density, and response to alarm calls influence flocking propensity. Conversely, phylogenetic relationships did not influence response to heterospecific alarm calls. Among functional traits, however, foraging strategy, foraging density, and flocking propensity partially explained responses to alarm calls. Our results suggest that flocking propensity and perceived predation risk are positively related and that functional ecological traits and evolutionary history may explain certain species' associations.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Conducta Predatoria
/
Conducta Social
/
Vocalización Animal
/
Conducta Animal
/
Aves
Tipo de estudio:
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
País como asunto:
America do sul
/
Guyana francesa
Idioma:
En
Año:
2016
Tipo del documento:
Article