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Association between omnivorous Orius bugs and their thrips prey at different spatial scales of Verbesina encelioides flowers
Year:
2010
Source of publication :
Israel Journal of Plant Sciences
Authors :
Tabic, Arnon
;
.
Volume :
58
Co-Authors:
Tabic, A., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Yonah, R., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Coll, M., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Facilitators :
From page:
131
To page:
141
(
Total pages:
11
)
Abstract:
While many field studies have estimated the numerical response of predator populations to their prey, little is known about the numerical response of omnivores, especially at different spatial scales. We sampled populations of omnivorous Orius bugs and their thrips prey in Verbesina encelioides flowers at three hierarchical spatial scales; a flower, a small patch of plants (2 m diameter), and a large patch of plants (6 m diameter). Omnivore and prey densities were correlated using hierarchical statistic models. Data show that while prey was aggregated at the flower scale, adult omnivores were distributed uniformly at that level. These results suggest that antagonistic intraguild interactions may be shaping omnivore distribution at the smallest scale studied. The correlation between omnivore and prey densities was scale-dependent. Density of Orius nymphs was positively correlated with prey density at all spatial scales, but the density of adult bugs was positively correlated with prey density only at the largest scale. Results obtained here and from a companion study suggest that female bugs aggregate and lay more eggs where prey is more abundant. Differential mobility of Orius adults and nymphs may therefore underlie observed differences in omnivore-prey association at different spatial scales. Future studies should explore effects of plant materials on the aggregative response of omnivores to variation in prey density. © 2010 Science From Israel / LPPltd., Jerusalem.
Note:
Related Files :
Antagonism
correlation
dicotyledon
mobility
omnivory
Orius
spatial dynamics
Verbesina
Verbesina encelioides
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Related Content
More details
DOI :
10.1560/IJPS.58.2.131
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29021
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:43
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Scientific Publication
Association between omnivorous Orius bugs and their thrips prey at different spatial scales of Verbesina encelioides flowers
58
Tabic, A., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Yonah, R., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Coll, M., Department of Entomology, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Association between omnivorous Orius bugs and their thrips prey at different spatial scales of Verbesina encelioides flowers
While many field studies have estimated the numerical response of predator populations to their prey, little is known about the numerical response of omnivores, especially at different spatial scales. We sampled populations of omnivorous Orius bugs and their thrips prey in Verbesina encelioides flowers at three hierarchical spatial scales; a flower, a small patch of plants (2 m diameter), and a large patch of plants (6 m diameter). Omnivore and prey densities were correlated using hierarchical statistic models. Data show that while prey was aggregated at the flower scale, adult omnivores were distributed uniformly at that level. These results suggest that antagonistic intraguild interactions may be shaping omnivore distribution at the smallest scale studied. The correlation between omnivore and prey densities was scale-dependent. Density of Orius nymphs was positively correlated with prey density at all spatial scales, but the density of adult bugs was positively correlated with prey density only at the largest scale. Results obtained here and from a companion study suggest that female bugs aggregate and lay more eggs where prey is more abundant. Differential mobility of Orius adults and nymphs may therefore underlie observed differences in omnivore-prey association at different spatial scales. Future studies should explore effects of plant materials on the aggregative response of omnivores to variation in prey density. © 2010 Science From Israel / LPPltd., Jerusalem.
Scientific Publication
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