The wild at heart lost journal pages
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State laws may afford them additional protections. None of these bees were found by the new census effort, and all of them are already on similar federal lists.
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The Western bumble, or Bombus occidentalis, is one of four bumble bee species cleared by the state's Third Appellate District Court of Appeal for inclusion on California's endangered species list. "It's possible in these places that if we'd taken 200 bees, we'd have continued to capture additional species," she said. However, Woodard said that in some places with higher diversity, like the White or Sierra Nevada mountains, the team might have found additional species if they had collected more specimens. This approach was likely sufficient to capture the relative abundance of species at most of the sites in the study. In each site where they could find bees, the research team sampled only 100, in an attempt to minimize harm to already beleaguered bumble bee populations. "Even the most dominant species has lost a lot of suitable habitat since the last large-scale survey," Woodard said. The team attempted to collect at four places in Southern California but could not locate more than 10 bees in those sites at the time of their visits. They perform a type of pollination required for plants including tomatoes, peppers and cranberries.įor the updated data, UCR entomologist Hollis Woodard's research group collected bees from 17 total sites representing six different ecosystems previously known to host a large variety of bumble bees. Bumble bees can fly in cooler temperatures and lower light levels than many other bees, and help pollinate crops worth $3 billion annually in the U.S. It is important to have data that substantiates the bees' health. Led by UC Riverside, this study was an effort to document changes in bumble bee populations across large geographic areas in California since the last such study was done in the 1980s. Smaller-scale studies have documented significant declines in bumble bee populations around the world due to climate change, development of wild habitat, and the use of bee-killing pesticides.