Collaborative Research: Paleoecology of Jurassic Terrestrial Landscapes

合作研究：侏罗纪陆地景观的古生态学

• 批准号: 1734608
• 负责人: Timothy Myers
• 金额: $ 11.71万
• 依托单位: Southern Methodist University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2019-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1734608&HistoricalAwards=false
• 关键词: Collaborative; Research; Paleoecology; Jurassic; Terrestrial

This project will study ancient ecosystems of the Jurassic and could provide insight into how modern terrestrial ecosystems may respond to warmer future climates. High atmospheric concentrations of greenhouse gases and warm global temperatures make the Jurassic Period an appropriate analog for near-future climates. The responses of plants and animals to changes in climate in ancient ecosystems will inform predictions on long-term effects of changing climate for modern biodiversity. The ancient soils will be sampled and analyzed to estimate temperature and precipitation. This project will enhance STEM education through mentorship of students, including funding for graduate student participation in field work and involvement of undergraduate students in laboratory analyses, and training a graduate student in new analytical methods. Broad dissemination of results will be achieved through development of a project website and an agreement with the Perot Museum in Dallas to feature this project in its exhibits. By emphasizing the connections between climate and biodiversity in modern and ancient environments, this project has the potential to inform the public and policy discussions about the implications of global environmental change.This project examines the relationships among faunal richness, primary productivity, and moisture availability in Late Jurassic terrestrial ecosystems of the Junggar Basin in northwestern China. Comparison of these results with previous studies will test if these ecological factors are positively correlated in the Jurassic, as in the modern. This project will 1) reconstruct Middle to Late Jurassic paleoclimate in the Junggar Basin during the using paleosol (ancient soil) morphology and geochemistry, 2) contrast Middle and Late Jurassic productivity within the basin, and 3) compare the Late Jurassic productivity-richness-climate relationship in northwestern China with previously observed patterns in North America and Europe. Paleosols from multiple stratigraphic sections in the Junggar Basin will be measured, described, and classified for mineralogical, elemental, and stable isotopic composition to provide estimates of paleoprecipitation and paleotemperature. Paleotemperature estimates will be derived from clumped isotope analysis of paleosol calcite and hydrogen and oxygen isotope analysis of clay minerals. Soil carbon dioxide concentration, a proxy for productivity, will be estimated using the carbon isotope values of paleosol calcite and associated organic matter.

该项目将研究侏罗纪的古代生态系统，并可以深入了解现代陆地生态系统如何应对未来气候变暖。 大气中高浓度的温室气体和温暖的全球气温使侏罗纪时期成为近期气候的适当模拟。植物和动物对古代生态系统中气候变化的反应将为预测气候变化对现代生物多样性的长期影响提供信息。将对古代土壤进行取样和分析，以估计温度和降水量。该项目将通过对学生的指导加强STEM教育，包括资助研究生参与实地工作和本科生参与实验室分析，并培训研究生掌握新的分析方法。将通过开发一个项目网站和与达拉斯佩罗博物馆达成协议，在其展览中介绍该项目，从而广泛传播成果。通过强调现代和古代环境中气候与生物多样性之间的联系，该项目有可能为公众和政策讨论提供有关全球环境变化的信息。该项目考察了中国西北部准噶尔盆地晚侏罗世陆地生态系统中动物丰富度、初级生产力和水分供应之间的关系。将这些结果与以前的研究进行比较，将测试这些生态因素是否在侏罗纪和现代一样呈正相关。本项目将利用古土壤形态学和地球化学资料重建准噶尔盆地中晚侏罗世古气候，对比盆地内中晚侏罗世的生产力，并将中国西北地区晚侏罗世的生产力-丰度-气候关系与北美和欧洲的观测模式进行对比。对准噶尔盆地多个地层剖面的古土壤进行矿物学、元素和稳定同位素组成的测量、描述和分类，以提供古降水和古温度的估计。古温度的估计将来自于古土壤方解石的聚集同位素分析和粘土矿物的氢氧同位素分析。土壤二氧化碳浓度，生产力的代理，将估计使用古土壤方解石和相关的有机质的碳同位素值。