نتایج جستجو برای: hoverflies

تعداد نتایج: 225  

Journal: :Plant biology 2009
J Shi Y-B Luo P Bernhardt J-C Ran Z-J Liu Q Zhou

Paphiopedilum barbigerum T. Tang et F. T. Wang, a slipper orchid native to southwest China and northern Vietnam, produces deceptive flowers that are self-compatible but incapable of mechanical self-pollination (autogamy). The flowers are visited by females of Allograpta javana and Episyrphus balteatus (Syrphidae) that disperse the orchid's massulate pollen onto the receptive stigmas. Measuremen...

Journal: :Land 2022

Supporting biodiversity in agricultural landscapes is key from both a conservation and ecosystem services perspective. Planting flower margins along crop field edges one of the most established approaches to try improve habitat resources for insect pollinators on farms. Whilst there growing evidence that these can result increased pollinator abundance diversity farms short-term, little data loo...

Journal: :Diversity and Distributions 2022

Aim Aggregated species occurrence data are increasingly accessible through public databases for the analysis of temporal trends in geographic distributions species. However, biases these present challenges statistical inference. We assessed potential available GBIF on occurrences four flower-visiting taxa: bees (Anthophila), hoverflies (Syrphidae), leaf-nosed bats (Phyllostomidae) and hummingbi...

Journal: :Basic and Applied Ecology 2022

Sowing of wildflower strips has been integrated in agri-environment schemes several European countries. Their beneficial effects on natural enemies pest insects are well documented but (1) the desired spill-over into crop fields not always demonstrated, and (2) need to adapt sown mixtures regional climatic differences rarely addressed. We set up a multi-site experiment different French regions ...

Journal: :Journal of Applied Entomology 2022

Pollinating insects provide pollination services to many crop species, including sweet cherry (Prunus avium L.), and this can be delivered by both managed wild pollinators. Managed pollinators are often used pollinate a range of fruit crops, but increasingly the role is being studied. However, importance pollinator species depends on their relative abundance effectiveness, which foraging activi...

2011
Adam J. Bates Jon P. Sadler Alison J. Fairbrass Steven J. Falk James D. Hale Tom J. Matthews

BACKGROUND The potential for reduced pollination ecosystem service due to global declines of bees and other pollinators is cause for considerable concern. Habitat degradation, destruction and fragmentation due to agricultural intensification have historically been the main causes of this pollinator decline. However, despite increasing and accelerating levels of global urbanization, very little ...

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