A geographic mosaic of trophic interactions and selection: trees, aphids and birds.
J Evol Biol
; 24(2): 422-9, 2011 Feb.
Article
em En
| MEDLINE
| ID: mdl-21091573
ABSTRACT
Genetic variation in plants is known to influence arthropod assemblages and species interactions. However, these influences may be contingent upon local environmental conditions. Here, we examine how plant genotype-based trophic interactions and patterns of natural selection change across environments. Studying the cottonwood tree, Populus angustifolia, the galling aphid, Pemphigus betae and its avian predators, we used three common gardens across an environmental gradient to examine the effects of plant genotype on gall abundance, gall size, aphid fecundity and predation rate on galls. Three patterns emerged (i) plant genotype explained variation in gall abundance and predation, (ii) G×E explained variation in aphid fecundity, and environment explained variation in gall abundance and gall size, (iii) natural selection on gall size changed from directional to stabilizing across environments.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Afídeos
/
Aves
/
Cadeia Alimentar
/
Populus
/
Comportamento Alimentar
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Evol Biol
Ano de publicação:
2011
Tipo de documento:
Article