نتایج جستجو برای: insect pollinators
تعداد نتایج: 42032 فیلتر نتایج به سال:
September 2, 2016 Biodiversity can provide an economic insurance value against the uncertain provision of ecosystem services for risk-averse economic agents. For uncertain pollination services, we determine the risk premium and the economic insurance value of wild pollinators in almond orchards for a risk-averse farmer. For this, we describe pollination services as a distribution, which can be ...
Obligate mutualistic nursery pollination systems between insects and plants have led to substantial codiversification involving at least some parallel cladogenesis, as documented in Yucca, Ficus and Phyllanthaceae. In such systems, pollinators are generally species specific thus limiting hybridization and introgression among interfertile host species. Nevertheless, in the three systems, cases o...
Where is the UK's pollinator biodiversity? The importance of urban areas for flower-visiting insects
Insect pollinators provide a crucial ecosystem service, but are under threat. Urban areas could be important for pollinators, though their value relative to other habitats is poorly known. We compared pollinator communities using quantified flower-visitation networks in 36 sites (each 1 km(2)) in three landscapes: urban, farmland and nature reserves. Overall, flower-visitor abundance and specie...
Impact of pollination on the agri-food sector is paramount importance. Pollinators contribute to maintenance ecosystems, reproduction and survival many plants, their presence usually leads increased yield quality agricultural products. Breeding selecting for plant traits enhancing pollinator visits could therefore lead more resilient farming systems. In stating advantages pollinators in systems...
Hybridization and insect pollination are widely believed to increase rates of plant diversification. The extreme diversity of figs (Ficus) and their obligate pollinators, fig wasps (Agaonidae), provides an opportunity to examine the possible role of pollinator-mediated hybridization in plant diversification. Increasing evidence suggests that pollinator sharing and hybridization occurs among fig...
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