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Article
Seed properties and bacterial communities are associated with feeding preferences of a seed-eating beetle
Bacterial communities inhabiting seeds may interact not only with the plant host, but also with seed predators. The study compared the bacterial communities associated with seeds of seven weeds Crepis biennis, Ta...
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Article
Factors determining variation in colour morph frequencies in invasive Harmonia axyridis populations
The Harlequin ladybird Harmonia axyridis Pallas, native to eastern Asia, is an invasive, non-native species that has recently achieved an almost worldwide distribution. A conspicuous feature of this species is co...
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Article
Spreading of alien species and diversity of communities
A new species invading a new area may cause a decrease in diversity of the community already present there. Comparison of temporal changes in species diversity of the “new” community (including alien species) ...
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Article
Harmonia axyridis failed to establish in the Azores: the role of species richness, intraguild interactions and resource availability
To understand the role of native ladybird biodiversity in habitat susceptibility on the establishment and spread of Harmonia axyridis Pallas (Coleoptera: Coccinellidae), we characterized and compared European com...
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Article
Species assemblages of ladybirds including the harlequin ladybird Harmonia axyridis: a comparison at large spatial scale in urban habitats
We evaluated the status of native ladybird assemblages in the presence of the non-native ladybird Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in three European countries. To achieve this, we assessed the...
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Article
The harlequin ladybird, Harmonia axyridis: global perspectives on invasion history and ecology
The harlequin ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), is native to Asia but has been intentionally introduced to many countries as a biological control agent of pest insects. In numerous...
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Article
Arthropod community of dandelion (Taraxacum officinale) capitula during seed dispersal
Dandelion (Taraxacum officinale) is an abundant Asteraceae species of grassland and vasteland stands. Through the vegetative season each plant produces a number of short-lived inflorescens. Final stage of inflore...
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Article
Asymmetrical intraspecific competition in Echinochloa crus-galli is related to differences in the timing of seedling emergence and seedling vigour
Individual size is an important factor that determines fitness in annual plants. Variation in size originates at the seedling stage based on differences in seedling vigour and time of emergence, ensuing asymme...
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Article
Contrast adaptation to time constraints on development of two pre-dispersal predators of dandelion (Taraxacum officinale) seed
Pre-dispersal seed predators of quickly maturing inflorescences of Asteraceae are constrained by shortage of development time. At seed dispersal, they should pupate or, if still immature, relocate into another...
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Article
Geographic variation in seed dormancy among populations of Echinochloa crus-galli
In 1991–1993, we investigated the incidence of seed dormancy in 25 local populations of barnyard grass, Echinochloa crus-galli (L.) P.Beauv., in the western Czech Republic. The percentage of germination after 4 m...
