Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Flower visitors"”.
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Silene otites (Caryophyllaceae): Attraction of nectar-seeking mosquitoes to inflorescence odours, and temporal variation of flower scent and flower visitors
In this investigation the role of flower odours in attracting mosquitoes to Silene otites were evaluated. Although mosquitoes are known to visit diverse flowers for nectaring, S. otites is one of only two plant species world-wide in which mosquitoes have been described as pollinators. In several …
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Can annual floral strips create effective pollinator habitat in Southern Ontario agricultural landscapes?
Flower visitors represent a key aspect of biodiversity, providing vital ecosystem services to native flowering plants and commodity crops. Studies indicate a decline in the abundance and diversity of flower visitors worldwide. Recently, Ontario developed a Pollinator Health Action Plan with the …
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Understanding the role and impact of introduced honey bees in a submontane indigenous forest ecosystem
… both positive and negative, on native plants and flower visitors in native ecosystems. This research aimed to investigate the impact of managed introductions of Apis mellifera in native forest dominated by Weinmannia racemosa and Ixerba brexioides, two native forest trees used extensively for …
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Plant-flower visitor interactions in the Sacred Valley of Peru
… Vilcanota Highlands, Peru. The assemblages of flower visitors were described and the plant-flower visitor matrices were analysed and compared to those found from other montane systems. Additionally, the thesis also addressed how the European honeybee (Apis mellifera) fits into these …
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Floral Scent in Salix L. and the Role of Olfactory and Visual Cues for Pollinator Attraction of Salix caprea L.
… The role of floral scent for attracting flower visitors was examined in S. caprea by means of electroantennographic studies and bioassays. The relevance of different pollen vectors for the reproductive success of this willow species was examined by pollination experiments. The floral …
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The diversity of flower-visiting insects in the gardens of English country houses
Flower-visiting insects provide essential pollination services, ensuring both global food security and the continuity of wild plants. Recently documented declines in pollinators give cause for concern. Identifying previously unappreciated habitats that support diverse assemblages of these insects …
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Effects of systemic fungicides on floral attributes, pollination and fruit aroma in strawberries
… organisms. When fungicides are applied to flowers, nectar-inhabiting microbes get in direct contact with the substance and contaminate floral rewards for pollinators, thus directly impairing the pollinators’ health. Also, the treated plants can be affected by the fungicide, changing their …
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Pollination ecology of Mesembs
… study sought to verify whether Mesemb species flowering during September and October in Vrolijkheit Nature Reserve have generalised or specialised pollination interactions. The determinants of insect choice to a particular plant species were investigated and possible mechanisms adopted by …
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THE ANTAGONISTIC AND MUTUALISTIC PLANT-INSECT INTERACTIONS OF PITCHER’S THISTLE (CIRSIUM PITCHERI [TORR. EX EAT.] TORR. & A. GRAY, ASTERACEAE), A FEDERALLY THREATENED GREAT LAKES DUNE AND COBBLE SHORE ENDEMIC PLANT
… from mid-June to early July, before C. pitcheri flowering. Heads that received oviposition were on average 12-14 mm in diameter. Approximately 32% of the 1,695 heads surveyed had oviposition. A subset of dissected heads had 56% weevil egg mortality. With weevil survival, the number of filled …
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Efficacy of agroecological approaches to ameliorate trade-offs between food production and biodiversity conservation
… using a different set of sites. I conducted flower-insect timed counts at ZBNF and agrichemical cashew orchards, and I interviewed farmers. I show that cashew flower visitation rate, and the abundance and species richness of flower visitors was higher for ZBNF than agrichemical farming. …