نتایج جستجو برای: insect pollinators
تعداد نتایج: 42032 فیلتر نتایج به سال:
Floral symmetry has a relevant status in the study of both pollination biology and animal behavior. In this work, a brief review and classification of symmetry types in flowers is provided as a basis for understanding the role of floral symmetry in pollination phenomena. We focus on insects as a fundamental group of pollinators, and we discuss symmetry from the perspective of insect perception....
1 There is mounting evidence of pollinator decline all over the world and consequences in many 2 agricultural areas could be significant. We assessed these consequences by measuring 1) the 3 contribution of insect pollination to the world agricultural output economic value, and 2) the 4 vulnerability of world agriculture in the face of pollinator decline. We used a bioeconomic 5 approach, which...
BACKGROUND Epipactis helleborine is an Eurasian orchid species which prefers woodland environments but it may also spontaneously and successfully colonise human-made artificial and disturbed habitats such as roadsides, town parks and gardens. It is suggested that orchids colonising anthropogenic habitats are characterised by a specific set of features (e.g., large plant size, fast flower produc...
Research on urban insect pollinators is changing views on the biological value and ecological importance of cities. The abundance and diversity of native bee species in urban landscapes that are absent in nearby rural lands evidence the biological value and ecological importance of cities and have implications for biodiversity conservation. Lagging behind this revised image of the city are urba...
An increasing degree of attention is being given to the ecosystem services which insect pollinators supply, and the economic value of these services. Recent research suggests that a range of factors are contributing to a global decline in pollination services, which are often used as a “headline” ecosystem service in terms of communicating the concept of ecosystem services, and how this ties pe...
Angiosperms diversification was primarily driven by pollinator agents, but non-pollinator agents also promoted floral evolution. Gentiana lutea shows pollinator driven flower color variation in NW Spain. We test whether insect herbivores and livestock, which frequently feed in G.lutea, play a role in G. lutea flower color variation, by answering the following questions: (i) Do insect herbivores...
Insect pollination benefits over three quarters of the world's major crops. There is growing concern that observed declines in pollinators may impact on production and revenues from animal pollinated crops. Knowing the distribution of pollinators is therefore crucial for estimating their availability to pollinate crops; however, in general, we have an incomplete knowledge of where these pollina...
© The Ecological Society of America www.frontiersinecology.org F covers more than 35% of Earth’s ice-free terrestrial area, and agriculture is expanding and intensifying in many regions to meet the growing demands of human populations (FAO 2013). This trend threatens biodiversity and the ecosystem services on which agriculture depends, including crop pollination (Garibaldi et al. 2011a). Indeed...
Pollinators provide an essential ecosystem service that contributes to the maintenance of biodiversity and ensures the survival of pt species including crop pts. Furthermore, the reproductive success in pts is often pollinator limited. Most of the vegetable crops are cross-pollinated i.e. the flowers of these crops need conspecific foreign pollen for pollination and seed set. Insect pollinators...
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