نتایج جستجو برای: pollinators
تعداد نتایج: 3395 فیلتر نتایج به سال:
Modularity is an important structural pattern in plant-pollinator networks that, when identified and examined, can lead to better understanding of drivers behind plant-pollinator interactions and contributions to resilience. Most module-detection algorithms rely on network structure alone. However, Newman and Clauset’s (2016) annotated network algorithm is able to leverage additional informatio...
According to the concept of pollination syndromes, floral traits reflect specialisation to a particular pollinator or set of pollinators. However, the reproductive biology of endemic, and often specialised, plants may require increased attention as climate change accelerates worldwide. Species of Roscoea endemic to the Himalayan region have striking orchid-like flowers with long corolla tubes, ...
Diversity of flower traits is often proposed as the outcome of selection exerted by pollinators. Positive directional pollinator-mediated selection on floral size has been widely shown to reduce phenotypic variance. However, the underlying mechanism of maintaining within-population floral color polymorphism is poorly understood. Divergent selection, mediated by different pollinators or by both ...
Mutualistic relationships between plants and their pollinators have played a major role in the evolution of biodiversity. While the vulnerability of these relationships to environmental change is a major concern, studies often lack a framework for predicting impacts from emerging threats (e.g. biological invasions). The objective of this study was to determine the reliance of Platanthera ciliar...
Floral nectar contains mainly sugars but also amino acids, organic acids, inorganic ions and secondary compounds to attract pollinators. The genus Nicotiana exhibits great diversity among species in floral morphology, flowering time, nectar compositions, and predominant pollinators. We studied nectar samples of 20 Nicotiana species, composed equally of day- and night-flowering plants and attrac...
Studies on pollination networks have provided valuable information on the number, frequency, distribution and identity of interactions between plants and pollinators. However, little is still known on the functional effect of these interactions on plant reproductive success. Information on the extent to which plants depend on such interactions will help to make more realistic predictions of the...
Bees are typically diurnal but around 1% of described species have nocturnal activity. Nocturnal bees still poorly studied due to bias towards studying insects. However, knowledge concerning their biology and role as crop pollinators has increased. We review the literature on bees’ traits host plants, assess pollination effectiveness this neglected group. visual adaptations cope with low light ...
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