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A dead carpenter bee. 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.
The decline was "apparent regardless of habitat type" and could not be explained by "changes in weather, land use, and habitat characteristics". The authors suggested that not only butterflies, moths and wild bees appear to be in decline, as previous studies indicated, but "the flying insect community as a whole". [1] [4] [52] [53] [54]
Declining numbers of bees predate CCD by several decades, however: the US managed hive industry has been shrinking at a steady pace since 1961. [13] In contrast, the bee population worldwide has been increasing steadily since 1975, based on honey production, with China responsible for most of the growth. [14]
Story at a glance New research underscores the negative effect of climate change on alpine bee populations. According to 60 years’ worth of data, bees in alpine regions are in an evolutionary ...
Scientists have been sounding the alarm about the decline in beneficial insect populations for years. Studies show that many species of bees, butterflies, and other pollinators are in serious trouble.
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Starting in 2006, California almond growers began to suffer losses due to colony collapse disorder, a poorly understood phenomenon resulting in the decline of bee populations. [2] While this increased pollination expenses for many growers, high demand for almonds created an incentive to transport bees from across the United States to California.
There are roughly 300 species of solitary wasps in California, she added. Yellowjackets and paper wasps are the two most common social wasp species in Northern California, Kimsey said.