A recent study has shown that changes in temperature have had a negative effect on new species of bumble bees over the past 120 years. These research findings have recently been published in Biology Letters.
Hannah Jackson, a postgraduate student in the M Gonigal Lab of Biology at Simon Fraser University, said on the study, "Bumble bees (Bumble bees) are important pollinators for wild plants and also for crops that humans depend on for food." We, therefore, need to develop conservation strategies that account for the future effects of climate change on bee populations.
Jackson and his colleagues in-depth analyzed existing datasets containing records on 46 bumblebee species in North America between 1900 and 2020. He made two models. First, on time and second on environmental factors. They found that six species of bumblebees decreased over time, while 22 increased and 18 remained stable, based on climate and land use.
The researchers noted that both temperature and precipitation increased between 1900 and 2020. on average in the period after the Industrial Revolution. Temperature change has mainly had a negative effect on bumble bees. 37 of the 46 species exhibited a greater decline than a change in temperature or a less positive increase in occupancy if the temperature remained constant. Importantly, nine species of bumble bee showed declines, which are associated with changing temperatures within their ranges. The team didn't find patterns in the other factors studied, such as rainfall and flower resources in which only one species declined.
In fact, both flower resources and rainfall had mixed results. About half of the bumblebee bee species were negatively affected by changes in rain flower resources, while the other half were positively affected. Therefore, the researchers conclude that changing temperatures are a major environmental factor that drives changes in bumble bee community composition. As bumble bee species vary in land use and future responses to climate change, says Jackson, conservation of these species should take precedence.