EAPSI: Japanese Diversity and Ecological Survival Limits of the Fluffy Sea Anemone, Metridium Senile

EAPSI：日本蓬松海葵、Metridium Senile 的多样性和生态生存极限

• 批准号: 1713898
• 负责人: Heather Glon
• 金额: $ 0.54万
• 依托单位: Glon Heather
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1713898&HistoricalAwards=false
• 关键词: EAPSI; Japanese; Diversity; Ecological; Survival

In the northern oceans, the distribution and diversity of species has been heavily impacted by glacial maxima. Sea anemones in the widespread temperate genus Metridium are benthic invertebrates that have been affected by past glaciations. Recolonization histories post-glaciation can be constructed and traced back to an originating refugial populations by studying the environmental adaptations and population genetics of contemporary populations of Metridium. This project will investigate the survival limits of Metridium to inform species distribution models while providing a deeper understanding of their potential and past distributions. The research for this project will be conducted at the Akkeshi Marine Station (Hokkaido University) in collaboration with Dr. Masahiro Nakaoka, an expert in marine benthic ecology. This project will be focused on performing experiments of live Metridium senile in aquaria with manipulated variables of temperature, salinity, and dissolved oxygen. Populations that dispersed to Hokkaido from a southern refugium are expected to tolerate greater higher temperature and to salinity fluctuations, whereas populations originating from deeper water are expected to show lower tolerance for fluctuations in temperature and salinity. Additionally, the researcher will be collecting specimens of M. senile throughout their northern range in Japan for molecular analysis, which, when compared with others throughout the Pacific, will indicate as to whether Japan served as a refugium for the Northern Pacific. These data will be applied to a wider study on the North Atlantic and Pacific phylogeography of M. senile to examine how distributional changes have proceeded and shifted as a response to atmospheric changes and inform how they might respond to future shifting climate conditions. This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is jointly funded by NSF and the Japan Society for the Promotion of Science. This award, under the East Asia and Pacific Summer Institutes program, supports summer research by a U.S. graduate student and is jointly funded by NSF and the Japan Society for the Promotion of Science.

在北部海洋，物种的分布和多样性受到盛冰期的严重影响。分布广泛的温带海葵属海葵是受过去冰川影响的底栖无脊椎动物。通过研究当代 Metridium 种群的环境适应和种群遗传学，可以构建冰河期后的重新殖民历史并追溯到原始的避难种群。该项目将调查 Metridium 的生存极限，为物种分布模型提供信息，同时更深入地了解其潜在和过去的分布。该项目的研究将在厚岸海洋站（北海道大学）与海洋底栖生态学专家 Masahiro Nakaoka 博士合作进行。该项目将重点在水族箱中进行活体老年Metridium 实验，并控制温度、盐度和溶解氧变量。从南部避难所分散到北海道的种群预计能够耐受更高的温度和盐度波动，而来自更深水域的种群预计对温度和盐度波动的耐受性较低。此外，研究人员还将在日本北部范围内收集老年分枝杆菌样本进行分子分析，与整个太平洋地区的其他样本进行比较，这将表明日本是否是北太平洋的避难所。这些数据将应用于更广泛的北大西洋和太平洋老年海龟系统发育地理学研究，以研究分布变化如何随着大气变化而发生和变化，并告知它们如何应对未来变化的气候条件。该奖项属于东亚和太平洋地区暑期学院计划，支持美国研究生的暑期研究，由美国国家科学基金会和日本科学振兴会共同资助。该奖项属于东亚和太平洋地区暑期学院计划，支持美国研究生的暑期研究，由美国国家科学基金会和日本科学振兴会共同资助。