DISSERTATION RESEARCH: The Cryptogramma acrostichoides complex--phylogeography at the crossroads of Beringia and other refugia

论文研究：Crypgramma acrostichoides 复合体——白令陆桥和其他保护区十字路口的系统发育地理学

• 批准号: 1311685
• 负责人: Stefanie Ickert-Bond
• 金额: $ 1.94万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311685&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Cryptogramma; acrostichoides; complex

Anthropogenic climate change will dramatically impact the world?s plants and animals through higher projected extinction rates and sizable range shifts, especially in high-latitude boreal regions. Responding to these dangers requires a deeper understanding of how species react to fast-moving, large-scale climate shifts. Similar impacts from rapid climate change during the Last Glacial Maximum (approx. 18000 years ago) can serve as a model for predicting the impacts of present-day anthropogenic climate change. This research will use the responses of parsley ferns (Cryptogramma species) growing in eastern Asia and western North America to rapid climate change during the Last Glacial Maximum as a model for predicting how today?s flora will survive anthropogenic climate change. These parsley ferns today span the area known as Beringia, which stretches from northeastern Asia across the Bering Sea into central Alaska and was subject to rapid climate change during the Last Glacial Maximum. By using large amounts of DNA sequence data, researchers will quantify patterns of genetic diversity across the landscape and examine the relative importance of surviving in a small number of refugial regions that can serve as sources for recolonization or migration versus surviving on numerous isolated mountaintops during the Last Glacial Maximum for these parsley ferns. Populations that are in particular danger of extinction from present day climate change will be identified for special conservation attention. The public and broader scientific community will benefit from this research in many ways. This project will help train the next generation of scientists as a graduate student and undergraduate student will become efficient in state of the art DNA sequencing methods and in executing an extended research project, including overseas field work. High school students, including Alaska Natives, will benefit from involvement in the collection and analysis of data. The international scope of the project will also develop research infrastructure beyond America?s borders through collaboration with Russian and Chinese researchers. The public will be able to access all of the data generated, including high-resolution images of preserved specimens, in online databases. This project will also reach out to the public through the production of an online identification key to the parsley ferns and through the publication of an outreach article on the impacts of climate change on the northern flora.

人为气候变化将通过更高的预计灭绝率和相当大的范围变化对世界动植物产生巨大影响，特别是在高纬度北方地区。应对这些危险需要更深入地了解物种如何应对快速变化的大规模气候变化。末次盛冰期（约 18000 年前）期间快速气候变化的类似影响可以作为预测当今人为气候变化影响的模型。 这项研究将利用亚洲东部和北美西部生长的欧芹蕨类植物（Cryptogramma 物种）对末次盛冰期期间快速气候变化的反应，作为预测当今植物群如何在人为气候变化中生存的模型。 这些欧芹蕨类植物如今遍布被称为白令海峡的地区，该地区从亚洲东北部穿过白令海一直延伸到阿拉斯加中部，并在末次盛冰期期间受到快速气候变化的影响。 通过使用大量 DNA 序列数据，研究人员将量化整个地区的遗传多样性模式，并研究在少数可以作为重新殖民或迁徙来源的避难地区生存与在许多孤立的山顶上生存的相对重要性。这些欧芹蕨类植物的末次盛冰期。因当今气候变化而特别面临灭绝危险的种群将被确定为特别保护关注对象。 公众和更广泛的科学界将从许多方面受益于这项研究。该项目将帮助培养下一代科学家，使研究生和本科生能够高效地掌握最先进的 DNA 测序方法并执行扩展的研究项目，包括海外实地工作。 高中生，包括阿拉斯加原住民，将受益于参与数据收集和分析。 该项目的国际范围还将通过与俄罗斯和中国研究人员的合作开发美国境外的研究基础设施。 公众将能够访问在线数据库中生成的所有数据，包括保存标本的高分辨率图像。 该项目还将通过制作欧芹蕨类植物的在线识别密钥以及发表有关气候变化对北方植物区系影响的外展文章来向公众宣传。