Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae)
The factors that affect the local distribution of the invasive Harmonia axyridis are not yet completely resolved. Hypotheses predicting positive and independent effects of prey abundance and degree of urbanization on the adult abundance of this species in Central Europe were tested. Populations of H...
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Institute of Entomology, Biology Centre, Czech Academy of Science
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doaj-35a0d1a5ec524df681d107a0411db8722021-04-16T20:35:59ZengInstitute of Entomology, Biology Centre, Czech Academy of ScienceEuropean Journal of Entomology1210-57591802-88292018-12-01115170370710.14411/eje.2018.069eje-201801-0069Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae)Alois HONĚK0Zdenka MARTINKOVÁ1Jan ŠTROBACH2Crop Research Institute, Drnovska 507, CZ-16106 Praha 6 - Ruzyně, Czech Republic; e-mails: honek@vurv.cz, martinkova@vurv.cz, strobach@vurv.czCrop Research Institute, Drnovska 507, CZ-16106 Praha 6 - Ruzyně, Czech Republic; e-mails: honek@vurv.cz, martinkova@vurv.cz, strobach@vurv.czCrop Research Institute, Drnovska 507, CZ-16106 Praha 6 - Ruzyně, Czech Republic; e-mails: honek@vurv.cz, martinkova@vurv.cz, strobach@vurv.czThe factors that affect the local distribution of the invasive Harmonia axyridis are not yet completely resolved. Hypotheses predicting positive and independent effects of prey abundance and degree of urbanization on the adult abundance of this species in Central Europe were tested. Populations of H. axyridis were sampled in a period when it was most abundant, by sweeping lime trees (Tilia spp.) at 28 sites along a 20 km transect across urban (western Prague) and surrounding rural areas. The sites differed in aphid abundance (number of Eucallipterus tiliae per 100 sweeps) and degree of urbanization (percentage of the surrounding area within a 500 m radius covered by impervious human constructions). Multiple linear regression analysis of log-transformed data revealed that abundance of H. axyridis (number of adults per 100 sweeps) increased significantly with both aphid abundance (P = 0.015) and urbanization (P = 0.045). The positive relationship between degree of urbanization and abundance of H. axyridis was thus not a side effect of variation in aphid abundance, which was also greater in urban than rural areas. The effect of urbanization might constrict the habitat available to H. axyridis and force this species to aggregate in urban green "refugia". These results point to a plurality of factors that determine coccinellid abundance at natural sites.https://www.eje.cz/artkey/eje-201801-0069_Effect_of_aphid_abundance_and_urbanization_on_the_abundance_of_Harmonia_axyridis_Coleoptera_Coccinellidae.phpaphididaeeucallipterus tiliaecoleopteracoccinellidaeharmonia axyridistiliatreeabundancedistributionpopulationurbanization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alois HONĚK Zdenka MARTINKOVÁ Jan ŠTROBACH |
spellingShingle |
Alois HONĚK Zdenka MARTINKOVÁ Jan ŠTROBACH Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) European Journal of Entomology aphididae eucallipterus tiliae coleoptera coccinellidae harmonia axyridis tilia tree abundance distribution population urbanization |
author_facet |
Alois HONĚK Zdenka MARTINKOVÁ Jan ŠTROBACH |
author_sort |
Alois HONĚK |
title |
Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) |
title_short |
Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) |
title_full |
Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) |
title_fullStr |
Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) |
title_full_unstemmed |
Effect of aphid abundance and urbanization on the abundance of Harmonia axyridis (Coleoptera: Coccinellidae) |
title_sort |
effect of aphid abundance and urbanization on the abundance of harmonia axyridis (coleoptera: coccinellidae) |
publisher |
Institute of Entomology, Biology Centre, Czech Academy of Science |
series |
European Journal of Entomology |
issn |
1210-5759 1802-8829 |
publishDate |
2018-12-01 |
description |
The factors that affect the local distribution of the invasive Harmonia axyridis are not yet completely resolved. Hypotheses predicting positive and independent effects of prey abundance and degree of urbanization on the adult abundance of this species in Central Europe were tested. Populations of H. axyridis were sampled in a period when it was most abundant, by sweeping lime trees (Tilia spp.) at 28 sites along a 20 km transect across urban (western Prague) and surrounding rural areas. The sites differed in aphid abundance (number of Eucallipterus tiliae per 100 sweeps) and degree of urbanization (percentage of the surrounding area within a 500 m radius covered by impervious human constructions). Multiple linear regression analysis of log-transformed data revealed that abundance of H. axyridis (number of adults per 100 sweeps) increased significantly with both aphid abundance (P = 0.015) and urbanization (P = 0.045). The positive relationship between degree of urbanization and abundance of H. axyridis was thus not a side effect of variation in aphid abundance, which was also greater in urban than rural areas. The effect of urbanization might constrict the habitat available to H. axyridis and force this species to aggregate in urban green "refugia". These results point to a plurality of factors that determine coccinellid abundance at natural sites. |
topic |
aphididae eucallipterus tiliae coleoptera coccinellidae harmonia axyridis tilia tree abundance distribution population urbanization |
url |
https://www.eje.cz/artkey/eje-201801-0069_Effect_of_aphid_abundance_and_urbanization_on_the_abundance_of_Harmonia_axyridis_Coleoptera_Coccinellidae.php |
work_keys_str_mv |
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1721524431294038016 |