Despite the importance of bumble bees (genus Bombus Latreille) for their services to natural and agricultural environments, we know little about the relationship between grassland management practices and bumble bee conservation. Prescribed fire is a common grassland maintenance tool, including in areas where endangered and threatened bumble bees are present. Thus, knowledge of the effects of prescribed fire on bumble bees is essential for designing management schemes that protect and bolster their populations. Using nonlethal surveys to record bumble bee species richness, abundance, and community composition, we evaluated the effects of spring controlled burns on summer bumble bee gynes and workers across five sites in southern Wisconsin. In addition, we explored the effects of fire on floral resources by measuring floral genus richness, abundance, ground cover, and proportion of transects containing blooming flowers in adjacent burned and unburned parcels. Prescribed fire had no measurable effects on bumble bee gyne or worker community composition, species richness, or abundance. However, consistent with previous studies prescribed fire increased floral genus richness and ground cover. The disconnect between bumble bee and floral responses to fire highlights some opportunities for improving our understanding of fire's effects on bumble bee diapause, nest site choice, and foraging.

中文翻译：

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规定火灾对大黄蜂（膜翅目：蜜蜂科）和花卉资源的年内影响。

尽管大黄蜂（Bombus Latreille 属）对自然和农业环境的服务很重要，但我们对草原管理实践与大黄蜂保护之间的关系知之甚少。规定的火是一种常见的草原维护工具，包括在存在濒临灭绝和受威胁的大黄蜂的地区。因此，了解规定的火灾对大黄蜂的影响对于设计保护和支持其种群的管理方案至关重要。我们使用非致命调查记录大黄蜂物种的丰富度、丰度和群落组成，评估了春季控制烧伤对威斯康星州南部五个地点的夏季大黄蜂妇产科和工人的影响。此外，我们通过测量花卉属的丰富度来探索火对花卉资源的影响，丰度、地被植物以及相邻烧毁和未烧毁地块中含有盛开花朵的样带的比例。规定的火灾对大黄蜂妇科或工人群落组成、物种丰富度或丰度没有可测量的影响。然而，与以前的研究一致，规定火增加了花卉属的丰富度和地被植物。大黄蜂和花卉对火的反应之间的脱节突出了一些机会，可以提高我们对火对大黄蜂滞育、巢址选择和觅食的影响的理解。与以前的研究一致，规定火增加了花卉属的丰富度和地被植物。大黄蜂和花卉对火的反应之间的脱节突出了一些机会，可以提高我们对火对大黄蜂滞育、巢址选择和觅食的影响的理解。与以前的研究一致，规定火增加了花卉属的丰富度和地被植物。大黄蜂和花卉对火的反应之间的脱节突出了一些机会，可以提高我们对火对大黄蜂滞育、巢址选择和觅食的影响的理解。