Collaborative Research: RAPID - Effects of an Extreme Disturbance Event on Genomic Variation and Community Organization of Stream Insects

合作研究：RAPID - 极端干扰事件对溪流昆虫基因组变异和群落组织的影响

• 批准号: 1434782
• 负责人: N. Leroy Poff
• 金额: $ 16.54万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1434782&HistoricalAwards=false
• 关键词: Collaborative; Research; RAPID; Effects; Extreme

This project will test hypotheses related to the response of stream organisms (insects) to the extreme, rare flood disturbance of September 2013 in Colorado's Front Range. Genetic and species composition data were collected from these streams prior to the disturbance as part of a previously funded NSF research project. These pre-event data allow the testing of specific evolutionary and ecological hypotheses about how extreme and non-seasonal disturbance acts to selectively remove maladapted genotypes, to modify genetic variation and gene frequencies, and to re-shape biological organization of insect communities through differential species survival and associated transformation of stream food webs. Fourteen headwater streams that span an elevation gradient of over 2,000 meters and that experienced different degrees of flood disturbance will be re-sampled in late Spring 2014. The extreme flooding in Colorado received national media attention and continues to be a topic of scientific and public discussion, so this study will likely be of broad scientific and public interest. The research represents an unprecedented opportunity to discover broad, new insights into the integrated genetic and ecological response of aquatic insects to discrete, extreme disturbance. Findings from this project will be disseminated not only through professional meetings and journals, but also via the popular press and online venues, in order to help advance public understanding the vulnerability and risks of natural systems to unusually large disturbances of the kind predicted to become increasingly more common under rapid climate change.

该项目将测试与溪流生物（昆虫）对2013年9月科罗拉多前山脉极端罕见洪水干扰的反应相关的假设。 遗传和物种组成的数据收集从这些流之前的干扰作为以前资助的NSF研究项目的一部分。 这些事件前的数据允许测试特定的进化和生态假说，极端和非季节性的干扰行为，以选择性地删除不适应的基因型，修改遗传变异和基因频率，并重新塑造昆虫群落的生物组织，通过不同的物种生存和相关的转换流食物网。2014年春末，将对14条海拔梯度超过2,000米、经历过不同程度洪水扰动的源头河流进行重新采样。科罗拉多的极端洪水受到了全国媒体的关注，并继续成为科学和公众讨论的话题，因此这项研究可能会引起广泛的科学和公众兴趣。这项研究代表了一个前所未有的机会，可以发现水生昆虫对离散，极端干扰的综合遗传和生态反应的广泛，新的见解。该项目的研究结果不仅将通过专业会议和期刊传播，而且还将通过大众媒体和在线渠道传播，以帮助公众进一步了解自然系统对异常大的扰动的脆弱性和风险，这种异常大的扰动预计在快速气候变化下将变得越来越普遍。