Dissertation Research: Influence of Population Dynamics and Community Interactions on Mutualistic Outcomes in an Obligate Pollination Mutualism

论文研究：种群动态和群落相互作用对专性授粉互利共生结果的影响

• 批准号: 9800775
• 负责人: Theodore Fleming
• 金额: $ 0.68万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2000-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800775&HistoricalAwards=false
• 关键词: Dissertation; Research; Influence; Population; Dynamics

9800885 Strauss Plant traits that affect herbivory are usually studies without considering effects on pollination, or vice versa. This may result in an incomplete understanding of selection on these traits. Two species of Castilleja hemiparasites, which can obtain alkaloids from Lupinus host plants, will be used to test whether chemical defense against herbivores also deters pollinators. Castilleja species will be grown with either low-alkaloid or high-alkaloid varieties of conspecific lupines to test the consequences of alkaloid uptake on herbivory and pollination. Preliminary data support the hypothesis that these is an ecological tradeoff between herbivore defense and pollinator attraction. If such a tradeoff exists, it suggests new possibilities for constraints on the development of chemical defenses. The proposed research integrates chemical ecology at the whole plant level, advances basic knowledge of the ecology of parasitic plants, and develops a new methods to assess consequences of novel defensive chemicals in vivo. The concept that plant-animal interactions may be constrained by multiple selection pressures has broad applications in both natural and agricultural systems.

9800885影响食草性的施特劳斯植物性状的研究通常不考虑对授粉的影响，反之亦然。这可能导致对这些性状选择的不完全理解。可以从羽扇豆属寄主植物中获得生物碱的两种卡斯蒂利亚半寄生虫将被用来测试对食草动物的化学防御是否也能阻止传粉者。卡斯蒂利亚属植物将与同种羽扇豆碱的低生物碱或高生物碱品种一起种植，以测试生物碱吸收对草食和授粉的影响。初步数据支持这样一种假设，即这是食草动物防御和传粉者吸引之间的生态权衡。如果存在这样的权衡，它表明了限制化学防御发展的新可能性。这项研究整合了整个植物水平的化学生态学，提高了寄生植物生态学的基础知识，并开发了一种新的方法来评估新的防御性化学物质在体内的后果。植物与动物的相互作用可能受到多重选择压力的限制，这一概念在自然和农业系统中都有广泛的应用。