Temporal constancy of pollination systems is essential for the maintenance of pollinators through time. Community-level assessment of flowering phenology allows understanding variations across seasons and years and the risks of decoupling flowering and pollinators’ activity. We evaluated flowering patterns and temporal diversity of pollination systems in a tropical seasonal forest. We asked whether the temporal organization of flowering times differs among pollination systems; if there is a constancy of pollination systems through the year, since climate and phylogenies constraint flowering time; if there is a prevalent flowering pattern by pollination system, and if the temporal organization of pollination systems by modularity analyses is coherent with grouping by pre-defined seasons. We characterized 10 pollination systems, examined flowering strategies, climate cues and phylogenetic constraints. Pollination by large-to-medium bees dominated (49.2%), followed by diverse insects (22.1%) and flies (14.7%). The remaining systems represented 14% of species. Flowering occurred year-round for most pollination systems, predominating the seasonal flowering strategy. Flowering patterns ranged from aggregated to nested, and random. Climate affected the flowering of most pollination systems, but there was no phylogeny constraint. Modularity grouped pollination systems differently than rainfall seasonality. Contrasting the expectations of reduced temporal constancy, most systems were present year-round, facilitating the exploitation of floral resources by pollinators. Diversity of pollination systems remained constant despite climate seasonality, indicating that several factors influence the optimum flowering time for pollination in seasonally dry vegetations. Global warming may disrupt phenological patterns and the temporal organization of plant communities, a matter for future studies.

授粉系统的时间稳定性对于通过时间维持授粉媒介至关重要。社区层面的开花物候评估有助于了解不同季节和年份的变化以及开花与传粉媒介活动脱钩的风险。我们评估了热带季节性森林中授粉系统的开花模式和时间多样性。我们询问开花时间的时间组织是否因授粉系统而异；如果全年授粉系统是恒定不变的，因为气候和系统发育限制了开花时间；如果通过授粉系统存在普遍的开花模式，并且通过模块化分析的授粉系统的时间组织是否与按预定义的季节分组一致。我们描述了 10 个授粉系统，检查了开花策略、气候线索和系统发育限制。大到中型蜜蜂的授粉占主导地位（49.2%），其次是各种昆虫（22.1%）和苍蝇（14.7%）。其余系统占物种的 14%。大多数授粉系统全年开花，在季节性开花策略中占主导地位。开花模式从聚合到嵌套和随机。气候影响了大多数授粉系统的开花，但没有系统发育限制。模块化对授粉系统的分组方式与降雨季节性不同。与降低时间稳定性的预期相反，大多数系统全年都存在，促进了传粉媒介对花卉资源的利用。尽管气候季节性，授粉系统的多样性保持不变，表明有几个因素影响季节性干旱植被授粉的最佳开花时间。全球变暖可能会破坏植物群落的物候模式和时间组织，这是未来研究的问题。