RAPID: COLLABORATIVE RESEARCH: Ecological & genetic recovery from a massive invertebrate die-off along the central coast of California

快速：合作研究：生态

• 批准号: 1243958
• 负责人: Richard Grosberg
• 金额: $ 12.27万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1243958&HistoricalAwards=false
• 关键词: RAPID; COLLABORATIVE; RESEARCH; Ecological; &amp

The potentially important role that larval dispersal may play in determining gene flow, distributions, and population structure of marine invertebrates remains unclear despite many hundreds of descriptive comparisons of pelagic duration and population genetic structure. This lack of clarity suggests many factors may influence population genetic structure and their interactions may be complex. Difficulties studying these factors include (under normal circumstances) distinguishing local from exogenous recruitment and therefore the true distribution of dispersal distances. For example, experiments that normally could be undertaken to explore this issue are very small scale relative to the distances that many marine taxa may disperse.In August 2011, a large-scale natural removal experiment was initiated along a 100 km stretch of the central California coast. The PIs propose to use this rare opportunity to clarify the effects of dispersal and species interactions on marine population genetic variation and community structure. They propose to study three species that suffered very high rates of mortality: an ecosystem engineer (Strongylocentrotus purpuratus, ~100% mortality), a keystone species (Pisaster ochraceus, ~10-70% mortality), and one of its competitors (Leptasterias sp., ~100% mortality). Their objectives during this first year following the natural large-scale die-off are to [1] quantify the abundance and distribution of the target species at sites across the impacted range and reference sites to the south and north, [2] develop and use genetic markers to identify the sources and dispersal distances of new recruits of P. ochraceus, Leptasterias sp., and S. purpuratus that recolonize the impacted range, and [3] describe changes in abundance of these three species and their prey and competitors at sites throughout the impacted range.

尽管有数百个描述性比较，幼虫无脊椎动物的基因流，分布和种群结构可能在确定层次持续时间和种群遗传结构的数百个描述性比较，但仍不清楚海洋无脊椎动物的基因流，分布和种群结构的潜在重要作用。缺乏清晰度表明，许多因素可能会影响人口遗传结构，它们的相互作用可能很复杂。研究这些因素的困难包括（在正常情况下）区分局部和外源募集，因此分散距离的真实分布。 例如，通常可以进行探索这个问题的实验相对于许多海洋分类群可以分散的距离非常小。在2011年8月，沿着加州中部100公里的100公里开始了一个大规模的自然去除实验。 PI建议利用这一难得的机会来阐明分散和物种相互作用对海洋种群遗传变异和社区结构的影响。他们建议研究三种死亡率很高的物种：生态系统工程师（purvuratus strongylypertrotus purpuratus，〜100％死亡率），一种基石物种（Pisaster Ochraceus，〜10-70％死亡率）及其竞争者之一（Leptasterias sp。，leptasterias sp。，〜100％死亡率）。他们在自然大规模死亡之后的第一年的目标是[1]量化在受影响的范围内和南部和北面的地点的目标物种的丰度和分布，[2] [2]开发和使用遗传标记来识别ochraceus p. ochraceus，leptasterias spriped and S. pecorrons and S. reporronus and Incultians ins consects and s. repolins and in consect。在整个受影响范围内，这三种物种及其猎物和竞争对手中的竞争对手。