Bimodal activity of diurnal flower visitation at high elevation

Successful pollination in animal-pollinated plants depends on the temporal overlap between flower presentation and pollinator foraging activity. Variation in the temporal dimension of plant-pollinator networks has been investigated intensely across flowering seasons. However, over the course of a day, the dynamics of plant-pollinator interactions may vary strongly due environmental fluctuations. It is usually assumed there is a unimodal, diurnal, activity pattern, while alternative multi-modal types of activity patterns are often neglected and deserve greater investigation. Here, we quantified the daily activity pattern of flower visitors in two different habitats contrasting high elevation meadows versus forests in Southwest China to investigate the role of abiotic conditions in the temporal dynamics of plant-pollinator interactions. We examined diurnal activity patterns for the entire pollinator community. Pollinator groups may differ in their ability to adapt to habitats and abiotic ...

依赖动物传粉植物（animal-pollinated plants）实现成功传粉，有赖于花展示（flower presentation）与传粉者（pollinator）觅食活动的时间重叠。学界已针对植物-传粉者网络（plant-pollinator networks）在开花季内的时间维度变异开展了大量研究。然而在单日尺度下，植物与传粉者的互作动态可能因环境波动发生显著变化。现有研究通常默认传粉活动遵循单峰昼夜活动模式，而其他多峰类型的活动模式往往被忽视，亟待更深入的探究。本研究选取中国西南部的高海拔草甸与森林两类生境，量化了访花昆虫（flower visitors）的单日活动模式，以探究非生物条件（abiotic conditions）对植物-传粉者互作时间动态的调控作用。我们针对整个传粉者群落（pollinator community）分析了其昼夜活动模式。不同传粉类群对生境及非生物条件的适应能力可能存在差异……