The interaction between signal diversity and pollinator behaviour along a land use gradient

植物-传粉者网络中的通信有助于构建植物群落。在过去的1.5年里，我们发现土地利用降低了花卉的颜色多样性，改变了草原的整体颜色。我们现在的总体目标是评估这种变化是否会通过改变植物与传粉者和/或食草动物的相互作用来影响植物的繁殖。因此，我们将收集所有探索区草原的花卉颜色、种子产量、花蜜数量和质量以及昆虫造访花卉的定量数据。利用视觉模型，我们将分析不同传粉者群体的感官生态、植物奖励的营养可获得性的改变或植物物种丰度的差异是否影响传粉者的行为，以及这种变化是否影响植物的繁殖。此外，我们还将记录草食动物对花卉和营养组织的危害。最后，我们将实验性地操纵花蜜奖励和花卉颜色，以梳理出不同的功能假说，即为什么土地利用制度会影响花卉颜色。因此，结合植物繁殖的数据，我们可以回答土地利用制度引起的开花动植物之间视觉交流的变化是否有助于草原植物群落的构建。

Communication in plant-pollinator networks contributes to structuring plant communities. In the last 1.5 years, we found that land use diminishes colour diversity of flowers and changes the overall colouration of grasslands. Our overall aim is now to assess whether that change affects plant reproduction by altering their interactions with pollinators and/or herbivores. We will therefore collect quantitative data on floral colouration, seed production, nectar quantity and quality as well as insect visitation to flowers in the grasslands of all Exploratories. Using visual modelling we will analyse whether the sensory ecology of different pollinator groups, altered nutrient availability of plant rewards or differences in the abundance of plant species affect pollinator behaviour, and whether that change affects plant reproduction. Moreover, we will record herbivore damage of flowers and of vegetative tissue. Finally, we will experimentally manipulate nectar rewards and floral colours to tease apart different functional hypothesis on why land use regimes affect floral colour. Combined with data on plant reproduction, we can thus answer whether changes in the visual communication between flowering plants and animals that are caused by land use regimes contribute to structuring plant communities in the grasslands.