نتایج جستجو برای: insect pollinators
تعداد نتایج: 42032 فیلتر نتایج به سال:
Pollination systems frequently reflect adaptations to particular groups of pollinators. Such systems are indicative of evolutionary specialization and have been important in angiosperm diversification. We studied the evolution of pollination systems in the large genus Ruellia. Phylogenetic analyses, morphological ordinations, ancestral state reconstructions, and a character mapping simulation w...
Insect populations are declining globally. Most crops rely on insect pollination, putting food security at risk. Honeybees important pollinators and have been used widely in public awareness campaigns. This study surveyed countries about the status of their programmes for monitoring management. Responses were received from 273 persons 108 countries. Apis mellifera was reported by nearly all Man...
Invasive species often require mutualistic relationships to successfully invade new environments. Insect pollination is an example of a mutualism that is required for seed-set in the invasive species, Rosa multiflora Thunb. (Rosaceae), an obligate outcrosser. To determine the insect pollinators visiting R. multiflora flowers in Iowa, USA, we collected insects on yellow sticky traps placed on pl...
Aim Pollination plays a crucial role in the conservation of many plant species persisting fragmented, human-dominated landscapes. Pollinators are known to be instrumental maintaining genetic diversity and metapopulation dynamics for important providing ecological services that essential agricultural landscapes where populations native plants highly isolated. Numerous studies have explored value...
The night is a special niche characterized by dim light, lower temperatures, and higher humidity compared to the day. Several animals have made the transition from the day into the night and have acquired unique adaptations to cope with the challenges of performing nocturnal activities. Several plant species have opted to bloom at night, possibly as a response to aridity to prevent excessive wa...
BACKGROUND AND AIMS Successful invasive plants such as Araujia sericifera usually either are capable of automatic self-pollination or maintain pollinator services by having generalized pollination systems to make use of local pollinators in the invaded range. Alternatively, plants must co-opt new pollinators with similar morphology to native pollinators or reproduce asexually. We aimed to docum...
As a result of human activity, longleaf pine (Pinus palustris Miller) forests in the southern United States have been lost or drastically altered. Many of the plant species that historically occupied those forests now persist only as remnants and are classified as threatened or endangered. In order to safeguard such species, a better understanding of their pollination ecology is needed. We iden...
As agriculture faces documented decline in bees and other insect pollinators, empirical assessments of potential economic losses are critical for contextualizing the impacts of this decline and for prioritizing research needs. For the state of Georgia, we show that the annual economic value of biotic pollinators is substantial--US$367 million, equivalent to 13 percent of the total production va...
Aims Rhodiola dumulosa is a perennial herb growing in a naturally fragmented habitat of high-mountain rocks. This research aims to (i) investigate the mating system characteristics and pollination biology of R. dumulosa, (ii) study the effects of ecological factors on the mating system and pollination biology of R. dumulosa and (iii) assess the relationship between its pollination and mating sy...
Pollinators are responsible for the reproduction of many plant and crop species provide important diversity food webs cultural value. Despite critical ecosystem services provided by pollinators, rapid pollinator declines occurring in response to anthropogenic activities that cause loss suitable habitat. There is an opportunity urban green space support pollination locally across landscape. Howe...
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