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.

人为的气候变化将通过更高的预测灭绝率和相当大的范围转移，尤其是在高纬度北方地区，会极大地影响世界的动植物。应对这些危险需要更深入地了解物种对快速发展的大规模气候变化的反应。在最后一次冰川最大值（大约18000年前）中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。 这项研究将利用在最后一个冰川最大值期间在东亚和北美西部生长的欧芹蕨（加密物种）的响应，以预测当今的植物群将如何在人为的气候变化中生存。 如今，这些欧芹蕨类植物横跨该地区，该地区被称为贝林亚（Beringia），该地区从白令海东北亚地区延伸到阿拉斯加中部，在最后一次冰川最大值期间受到迅速的气候变化。 通过使用大量的DNA序列数据，研究人员将量化整个景观中遗传多样性的模式，并检查在少数避难所中生存的相对重要性，这些冰原区域可以用作重新殖民或迁移的来源，而不是在最后一次熟悉的山顶上生存，以供这些帕斯利·弗恩斯（Parsley Ferns）存活。当今气候变化尤其是灭绝的危险的人群将被确定以特殊的保护注意力。 公众和更广泛的科学界将在许多方面从这项研究中受益。该项目将有助于培训下一代科学家作为研究生，而本科生将在最先进的DNA测序方法中有效地训练，并执行包括海外现场工作在内的扩展研究项目。 包括阿拉斯加本地人在内的高中生将受益于参与数据的收集和分析。 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来发展美国以外的研究基础设施。 公众将能够访问在线数据库中生成的所有生成的数据，包括保留标本的高分辨率图像。 该项目还将通过生产欧芹蕨类植物的在线识别键以及发表有关气候变化对北部植物群的影响的外展文章的发表文章，向公众致敬。