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Pollinator decline is the reduction in abundance of insect and other animal pollinators in many ecosystems worldwide that began being recorded at the end of the 20th century. Multiple lines of evidence exist for the reduction of wild pollinator populations at the regional level, especially within Europe and North America.
Pollination by a specialist can result in high flowering synchrony, as asynchronous flowering can result in erratic attraction of a specialist to a site. [19] Showy floral displays tend to attract pollinators, [20] [21] and synchronous flowering can attract more pollinators to a population. High pollinator visitation to populations with high ...
Insects with population trends documented by the International Union for Conservation of Nature, for orders Collembola, Hymenoptera, Lepidoptera, Odonata, and Orthoptera. A 2020 meta-analysis found that globally terrestrial insects appear to be declining in abundance at a rate of about 9% per decade, while the abundance of freshwater insects appears to be increasing by 11% per decade.
Pollinators are vital for functioning ecosystems, but many are endangered. One simple way to help is by hosting native plants. What are pollinators and how do they 'hold entire ecosystems together'?
A survey by the University of Maryland and Auburn University published in 2023 found the number of United States honey bee colonies "remained relatively stable" although 48% of colonies were lost in the year that ended April 1, 2023, with a 12-year average annual mortality rate of 39.6%. The previous year (2021–2022) the loss was 39% and the ...
Two-thirds have had their spring events occur earlier. [8] Several European bird species' breeding seasons have been shifted to earlier periods, as indicated by the shifts in nestling ringing dates. [28] The range of hundreds of North American birds has shifted northward at an average rate of 1.5 km/year over the past 55 years. [29]
[1]: 189 A classic example of habitat isolation occurring in allopatry is that of host-specific cospeciation [1]: 189 such as in the pocket gophers and their host chewing lice [24] or in the fig wasp-fig tree relationship and the yucca-yucca moth relationship—examples of ecological speciation caused by pollinator isolation. [1]: 189 In ...
Honey bees are incredibly social insects. They live together in big groups with other bees in an organized society that scientists call eusocial, which means every bee has a job to do. This could ...