INVESTIGADORES
VIDELA Martin
artículos
Título:
Plant patch structure modifies parasitoid assemblage richness of a specialist herbivore
Autor/es:
FENOGLIO MARÍA SILVINA; SALVO ADRIANA; VIDELA MARTIN; VALLADARES GRACIELA
Revista:
ECOLOGICAL ENTOMOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2010 vol. 35 p. 594 - 601
ISSN:
0307-6946
Resumen:
1. The spatial
structure of plant
patches has been
shown to affect hostparasitoid interactions, but its
influence on parasitoid diversity remains largely ignored. Here we tested the
prediction that parasitoid species richness of the specialist leafminer
Liriomyza commelinae increases in larger
and less isolated patches of its host
plant Commelina erecta. We
also explored whether
parasitoid abundance and body size affected the occurrence of
parasitoid species in local assemblages.
2. A total of 893 naturally established C. erecta patches
were sampled on 18 sites around C´ordoba city (Argentina). Also, two
experiments were performed by creating patches differing in the number of
plants and the distance from a parasitoid source. For these tests, plants were
infected with the miner in the laboratory prior to placement in the field.
3. Plant patch size, independently of host abundance,
positively affected the number of
parasitoid species in both
survey observations and experimental data. However, plant patch
isolation did not influence parasitoid species richness.
4. The probability
of finding rare
parasitoid species increased
with patch size, whereas occupation of isolated patches
was independent of dispersal abilities (body size) of parasitoid species.
5. Overall, the results highlight the importance of
considering spatial aspects such as the size of plant patches in the study of
parasitoid communities.