Aboveground plant-insect interaction webs and associated processes along a plant diversity gradient

沿植物多样性梯度的地上植物-昆虫相互作用网和相关过程

• 批准号: 172005928
• 负责人: Professorin Dr. Alexandra-Maria Klein
• 金额: --
• 依托单位: Lehrstuhl für Terrestrische Ökologie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/172005928?language=en
• 关键词: Aboveground; plant; insect; interaction; webs

Pollination is most critical to plant reproduction and plant diversity is important to attract high pollinator diversity and pollination frequency. However, it has rarely been studied how flower traits, pollination, and other biotic interactions affect plant reproduction under a scenario of plant biodiversity decline. In this subproject, the following main objectives will be addressed: (1) Chemical flower traits will be measured and used together with morphological flower traits to explain the diversity and frequency of flower visits along the long-term plant diversity gradient; (2) The stoichiometry of mutualistic pollinator-flower interactions will be addressed by comparing C:N:P ratios of pollinators with the reproduction success of pollinators in the main experiment; (3) Flower visitation and plant-pollinator interaction webs will be analysed in the main and the (new) trait-based experiment including the integration of invaders in plant-pollinator interaction webs; (4) Plant species-specific responses to pollination and plant reproduction will be studied in the (new), trait-based experiment; (5) Hand- versus bagged pollination treatments applied in a greenhouse experiment will identify the breeding systems (autonomous self- versus cross-pollination) of major flowering plant species of the Jena experiment. The subproject will collect plant-specific traits (i) to explain flower visitation, pollination, and plant reproduction, and (ii) to add flower traits to the overall trait-based modelling. The subproject is therefore critical to understand plant reproduction dependent on plant diversity, and hence to understand plant population dynamics in grasslands that differ in plant species richness.

传粉是植物繁殖的关键，植物多样性是吸引高传粉者多样性和传粉频率的重要因素。然而，在植物生物多样性下降的情况下，花性状、授粉和其他生物相互作用如何影响植物繁殖的研究很少。本子项目的主要目标是：(1)测量花的化学性状，并将其与花的形态性状一起用于解释植物多样性梯度的多样性和花的访问频率；(2)在主试验中，通过比较传粉者的C:N:P比值与传粉者的繁殖成功率，探讨了传粉者与花相互作用的化学计量学特征；(3)对花的访花和植物-传粉者互作网进行了主要的分析，并对植物-传粉者互作网中入侵物的整合进行了（新的）性状实验；(4)植物对传粉和繁殖的物种特异性反应将在（新的）基于性状的实验中进行研究；(5)在温室试验中应用手传粉与套袋传粉处理将确定耶拿试验中主要开花植物物种的育种系统（自主自花授粉与异花授粉）。该子项目将收集植物特有的性状(i)来解释花的访问、授粉和植物繁殖，以及（ii）将花的性状添加到总体的基于性状的建模中。因此，该子项目对于了解植物繁殖依赖于植物多样性，从而了解植物物种丰富度不同的草原上的植物种群动态至关重要。