Climate Change Data Portal
| DISSERTATION RESEARCH: Estimating the genetic and demographic response of an amphibian metapopulation to global climate change | |
| 项目编号 | 1601470 |
| David Weisrock | |
| 项目主持机构 | University of Kentucky Research Foundation |
| 开始日期 | 2016-07-01 |
| 结束日期 | 2018-06-30 |
| 英文摘要 | This project will contrast the utility of population size estimates and migration estimates in predicting population declines and increases. It is known that populations that are too small can experience high levels of inbreeding and may lose much of their genetic diversity over time. In turn they may face higher extinction probabilities and for this reason population size could be a critical variable in many conservation plans. Population size, however, may be a poor predictor of a population's viability when additional forces are at play. Migration between locations as well as climate induced fluctuations in a population from year to year may be just as important as the average population size in predicting long term trends in a population's likelihood of survival. The researchers will examine the relative effectiveness of average population size, migration between populations and population variability in predicting the viability of populations of two salamander species. The project will develop more informative genetic monitoring techniques as well as the training of a doctoral student. This project will determine the effective population size (Ne), and gene flow patterns of two salamander species that have been monitored in the same wetland for 37 years. One of the species, Ambystoma opacum, is increasing in number while the other, Ambystoma talpoideum, is decreasing in number over the last fifteen years. This study will answer two questions: First, is the reliability of Ne as a predictor of population viability dependent on metapopulation structure? Second, how do gene flow and annual fluctuations in reproductive rate influence the long-term viability of populations? The question of how gene flow impacts viability estimates based on Ne will be addressed by collecting Single Nucleotide Polymorphism data from individuals from five connected subpopulations using next generation sequencing. Maximum likelihood estimates of Ne for the subpopulations, and Bayesian estimates of gene flow rates between the subpopulations will be calculated for both species. The importance of metapopulation structure in refining conclusions based on Ne will be determined for both declining and growing populations from that data. Individual based census data from previous years will be used to ground truth estimates obtained from genetic samples. Projection models will then be developed to predict whether the metapopulation of each species is at risk for extinction or if only individual subpopulations are expected be lost and recolonized over time. |
| 学科分类 | 09 - 环境科学;0903 - 环境生物学 |
| 资助机构 | US-NSF |
| 项目经费 | 18946 |
| 项目类型 | Standard Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/69691 |
| 推荐引用方式 GB/T 7714 | David Weisrock.DISSERTATION RESEARCH: Estimating the genetic and demographic response of an amphibian metapopulation to global climate change.2016. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [David Weisrock]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [David Weisrock]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [David Weisrock]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
