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We don't put up a paywall – we believe in free access to information of public interest. Well, unlike many news organisations, we have no sponsors, no corporate or ideological interests. The research team also included SFU professors Leithen M'Gonigle and Arne Mooers, and graduate student Sarah Johnson.
bohemicus, is estimated to have seen a dramatic decline of 73 per cent based on the new modelling. One species of critically endangered North American bumble bee, B. While researchers did not find major overall declines across all species, many individual species appear to be in trouble. The new multi-species modelling done on European bumble bee populations was more in line with previous studies, but the estimated population decline is still lower than previously thought (six per cent instead of 17). The estimates are especially skewed in North America, where historical data on bee visitation hasn't been as reliable and consistent as in Europe. This has inadvertently led to reports that have over-estimated the decline of bee populations. But often the data is collected haphazardly and the analysis has focused on a limited number of bee species, without taking the ranges and detection records of other species into account. Many species are certainly declining dramatically, but many others seem to be doing fine."Īccording to Guzman, scientists have had to rely on large datasets from museums, surveys and community science initiatives for their analysis of overall bee populations. "In a rare case of good news for biodiversity, we found there is no evidence of community-wide declines of bees. "When we reconsidered the evidence, we found that it's not all doom and gloom for bumble bees," says Melissa Guzman, lead author of the paper and a postdoctoral fellow in the Department of Biological Sciences at SFU. While some species of bees have seen alarming rates of decline, the findings, published in the journal Biological Conservation, suggest evidence gathering and modelling need to be improved so conservationists can prioritize the bee species most at risk. However, researchers at SFU have developed more accurate modelling that shows just a five per cent decline in North America overall. One study reported that overall bumble bee populations have dropped 46 per cent in North America over the last century. The plight of pollinators, such as bumble bees, has been the subject of high-profile studies, news reports, public awareness campaigns and corporate drives for years. A new study from Simon Fraser University is adding to a growing body of work that suggests not all bee populations are in decline. Don't bee-lieve everything you read reports of the bumble bee's death are greatly exaggerated.
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