The diversity of plant species in blooming throughout the year is a way of ensuring the presence of floral resources, as the spatiotemporal distribution of these resources assists in the movement of pollinators and guarantees local ecosystem services. The aim of this study was to describe the seasonal variations in the vertical distribution of the floral resources that keep the pollinators in Cerrado areas, the savanna region in Central Brazil, a biodiversity hotspot that depends more than 80% on bees for pollination. We studied four cerrado stricto sensu areas and evaluated monthly the flowering phenology, taking into account the number of individuals for each plant species blooming in all vertical strata (arboreal, shrubby, herbaceous, and lianas) and main floral resources (nectar, pollen, and floral oil). We evaluated the annual distribution of flowering plant species and individuals, and the availability of floral resources. We found a seasonal flowering pattern for the whole cerrado stricto sensu, with differences between areas, strata and floral resources types. The floral resources varied idiosyncratically among the strata over time, suggesting complementary blooming patterns throughout the year. The shrubby, herbaceous and liana species were key determinants in the availability of floral resources through the seasons. Our results reinforce the importance of including all the strata in plant surveys, as well as highlight the importance of the vertical stratification in the Cerrado plant formations as a source of floral resources during the time in which there are fewer resources available for pollinators in surrounding forest areas.

全年开花的植物物种多样性是确保花卉资源存在的一种方式，因为这些资源的时空分布有助于传粉媒介的移动并保证当地生态系统的服务。这项研究的目的是描述花卉资源垂直分布的季节性变化，这些变化使传粉媒介留在巴西中部大草原地区的塞拉多地区，而该地区是一个生物多样性热点，其中超过80％的蜜蜂依赖于授粉。我们研究了四个塞拉多·塞拉索·森苏并评估每个月的开花物候，并考虑到在所有垂直地层（树木，灌木，草本和藤本植物）和主要花卉资源（花蜜，花粉和花油）中开花的每种植物的个体数量。我们评估了开花植物物种和个体的年度分布以及花卉资源的可用性。我们发现了整个塞拉多严格的森苏的季节性开花模式，但区域，地层和花卉资源类型之间存在差异。随着时间的流逝，各层之间的花卉资源呈独特的变化，表明全年都有互补的盛开模式。在整个季节中，灌木，草本和藤本植物是决定花卉资源可用性的关键因素。我们的结果强调了将所有地层纳入植物调查的重要性，并强调了在周围森林中可用于授粉媒介的资源较少的时期，塞拉多植物地层中垂直分层作为花卉资源的重要性。地区。