Are there key innovations during invasion? A comparison between native and invasive slug species pairs based on metabolomics, bioassays and genetics

入侵期间是否有关键创新？

• 批准号: 195819127
• 负责人: Dr. Jan Sauer
• 金额: --
• 依托单位: Arbeitsgruppe Chemische Ökologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/195819127?language=en
• 关键词: there; key; innovations; during; invasion

Species invading new habitats potentially change genotypically and phenotypically during the invasion process, which often leads to enhanced competition in comparison with native species. Molecular analyses combined with chemical ecology are powerful tools to characterize population differences between native and invasive species pairs and to identify characteristics that may enhance the invasion success. This study will focus on the population differentiation of two slug species pairs, the in Germany invasive slug Arion lusitanicus in comparison to the native A. rufus and two Deroceras species. The aims are (I) to clarify the population structure of A. lusitanicus along its invasion pathway, (II) to investigate whether different selection pressures or hybridization with the native A. rufus have led to a differentiation within the invasive populations, (III) to investigate assortative mating as potential evolutionary force using the most differentiated A. lusitanicus populations and analysing species recognition behaviour with trail following and mate choice experiments, and (IV) to screen for key compounds that are responsible for species recognition using two Deroceras species as additional model organisms. It is expected that invasive slug species differ genetically as well as in the metabolomic composition of the mucus compared to the non-invasive conspecifics, and we expect rapid evolutionary changes that have increased the invasion potential of the slugs.

入侵新生境的物种在入侵过程中可能会改变基因型和表型，这往往导致与本地物种相比竞争增强。分子分析结合化学生态学是强有力的工具，以表征本地和入侵物种对之间的人口差异，并确定可能提高入侵成功的特点。本研究将着重于两个蛞蝓物种对的种群分化，在德国入侵蛞蝓阿里翁lusitanicus与本地A。rufus和两个Deroceras物种。目的是：（1）明确A.（二）不同的选择压力或与本地A. rufus导致了入侵种群内部的分化，（III）利用最分化的A. lusitanicus种群和分析物种识别行为的跟踪和交配选择实验，和（IV）筛选关键化合物，负责物种识别使用两个Deroceras物种作为额外的模式生物。预计与非入侵同种相比，入侵蛞蝓物种在遗传上以及粘液的代谢组组成方面存在差异，我们预计快速的进化变化会增加蛞蝓的入侵潜力。