Doctoral Dissertation Research: A Multi-Proxy Approach to Understanding Environmental Dynamics in Old-Growth Rocky Mountain Juniper Woodlands, New Mexico, U.S.A.

博士论文研究:了解美国新墨西哥州老落基山杜松林地环境动态的多代理方法

基本信息

  • 批准号:
    0927949
  • 负责人:
  • 金额:
    $ 1.17万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-09-01 至 2011-08-31
  • 项目状态:
    已结题

项目摘要

Long-lived trees provide multi-millennial records of the principle environmental factors associated with annual tree growth, such as precipitation and long-term climate oscillations. Dendrochronologists have established that some Southwestern conifer trees, including Douglas-fir, ponderosa pine, and Rocky Mountain juniper, can live to old ages in certain forest settings. Previous research on the remote lava flows at El Malpais National Monument (EMNM) and Cibola National Forest (CNF) located near Grants, New Mexico set the stage for this project. Here, conifers largely comprise a stunted woodland that harbors pockets of exceptional old-growth trees, some trees being over 2,000 years in age. The lava flows are, in effect, island ecosystems that exhibit a very different flora than the surrounding landscape which has a different substrate. Doctoral student Mark Spond, under the supervision of Professor Henri Grissino-Mayer, will use cross-dated Rocky Mountain juniper samples collected from the lava formations at EMNM and CNF to assess multi-scale relationships between monthly and seasonal climatic factors and Rocky Mountain juniper growth of the past 2,000 years. This study also investigates relationships between Rocky Mountain juniper growth at EMNM/CNF and within and between 10-year climate patterns (e.g., El Niño-Southern Oscillation and the Pacific Oscillation) and regional weather patterns (e.g., North American Monsoon). Smaller-scale vegetation dynamics within the old-growth woodlands at EMNM are assessed by the creation of permanent study plots, compilations of age structure data, and comparisons of repeated photographs. The results of this research will answer both theoretical and applied questions: Which climate variables correlate best with Rocky Mountain juniper growth? What is the average rate of annual growth for Rocky Mountain juniper? What relationships exist between Rocky Mountain juniper growth and climate patterns? What changes in vegetation can be observed in the old-growth mixed-conifer woodlands of EMNM between the 1940s and the present? And finally, can Rocky Mountain juniper tree-ring data aid in providing an expanded framework for water resource availability in the American Southwest, an area prone to extremes in hydrologic properties?This research will assist local and regional government officials in developing policies that can effectively address such issues as water allocation, invasive vegetation treatment, prescribed burn schedules, wildfire management, and other management issues in western New Mexico. Currently, the International Tree-Ring Data Bank (ITRDB) does not include Rocky Mountain juniper tree-ring data from the American Southwest. Rocky Mountain juniper chronologies produced by this doctoral dissertation research will be submitted to the ITRDB. Findings will be shared with land management officials and the broader scientific community through the dissertation, several professional presentations, and peer-reviewed journal articles. This research will also be incorporated into educational programs for K-12 students and teachers, conservation organizations, and government officials in Tennessee and New Mexico, using the successful model of the University of Tennessee's GK-12 Earth Project, funded by the National Science Foundation. The Principal Investigators of this research are committed to involving underrepresented groups in all phases of their project, and have successfully recruited several female undergraduate students to assist on this project.
长寿树木提供了数千年来与树木生长有关的主要环境因素的记录,如降水和长期气候振荡。树木年代学家已经证实,一些西南部的针叶树,包括道格拉斯冷杉、黄皮松和落基山刺柏,在某些森林环境中可以活到老。之前对位于新墨西哥州格兰茨附近的埃尔马尔派斯国家纪念碑(EMNM)和奇博拉国家森林(CNF)偏远熔岩流的研究为这一项目奠定了基础。在这里,针叶树主要由一片矮小的林地组成,那里有一些特殊的老树,有些树的树龄超过了2000年。实际上,熔岩流是岛屿生态系统,与周围具有不同底物的景观相比,呈现出非常不同的植物群。博士生Mark Spond在Henri Grissino-Mayer教授的指导下,将使用从EMNM和CNF的熔岩地层收集的落基山刺柏交叉日期样本,来评估月度和季节性气候因素与过去2000年落基山脉刺柏生长之间的多尺度关系。这项研究还调查了落基山刺柏在EMNM/CNF和10年气候模式(例如厄尔尼诺-南方涛动和太平洋涛动)与区域天气模式(例如北美季风)之间的关系。EMNM老林地内较小尺度的植被动态通过创建永久研究小区、汇编年龄结构数据和比较重复照片来评估。这项研究的结果将回答理论和应用问题:哪些气候变量与落基山刺柏的生长最相关?落基山刺柏的年平均增长率是多少?落基山刺柏的生长和气候模式之间存在什么关系?从1940年代到现在,在EMNM古老的针叶混交林中,可以观察到植被发生了什么变化?最后,落基山杜松年轮数据是否有助于为美国西南部的水资源可获得性提供一个扩展的框架?这项研究将帮助当地和地区政府官员制定政策,有效地解决新墨西哥州西部的水资源分配、入侵植被处理、规定的燃烧时间表、野火管理和其他管理问题。目前,国际树木年轮数据库(ITRDB)不包括来自美国西南部的落基山刺柏年轮数据。这项博士论文研究产生的落基山杜松年表将提交给ITRDB。研究结果将通过论文、几个专业报告和同行评议的期刊文章与土地管理官员和更广泛的科学界分享。这项研究还将被纳入田纳西州和新墨西哥州K-12学生和教师、保护组织和政府官员的教育项目中,使用田纳西大学由国家科学基金会资助的GK-12地球项目的成功模式。这项研究的首席调查人员致力于让代表性不足的群体参与他们项目的所有阶段,并成功地招募了几名女本科生来协助这一项目。

项目成果

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Henri Grissino-Mayer其他文献

Henri Grissino-Mayer的其他文献

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{{ truncateString('Henri Grissino-Mayer', 18)}}的其他基金

Collaborative Research: An International Professional-Development Workshop in Dendrochronology: North American Dendroecological Fieldweek (NADEF)
合作研究:树木年代学国际专业发展研讨会:北美树木生态学现场周(NADEF)
  • 批准号:
    1061501
  • 财政年份:
    2011
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Continuing Grant
Doctoral Dissertation Research: Vegetation Dynamics of Endangered Pine Rockland Communities in the Lower Florida Keys
博士论文研究:佛罗里达群岛下游濒临灭绝的松石罗克兰社区的植被动态
  • 批准号:
    1002479
  • 财政年份:
    2010
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Climate-Induced Range Dynamics in Eastern U.S. Forests
博士论文研究:美国东部森林气候引起的范围动态
  • 批准号:
    0902698
  • 财政年份:
    2009
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Treeline Responses to Climate Change in High-Elevation Landscapes of Western Montana
博士论文研究:蒙大拿州西部高海拔景观林线对气候变化的响应
  • 批准号:
    0602632
  • 财政年份:
    2006
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: A Multi-Scale Analysis of Disturbance Dynamics in Hardwood Forest Communities on the Cumberland Plateau, USA
博士论文研究:美国坎伯兰高原阔叶林群落扰动动态的多尺度分析
  • 批准号:
    0602445
  • 财政年份:
    2006
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Range of Variability in Fire Regimes of Table Mountain Pine (Pinus pungens Lamb.) Stands, Jefferson National Forest, Virginia
博士论文研究:弗吉尼亚州杰斐逊国家森林桌山松 (Pinus pungens Lamb.) 林地火灾状况的变化范围
  • 批准号:
    0525734
  • 财政年份:
    2005
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Landscape Level Dynamics in an Endangered Mountain Ecosystem, Northern Rocky Mountains, USA
博士论文研究:美国落基山脉北部濒危山区生态系统的景观水平动态
  • 批准号:
    0503329
  • 财政年份:
    2005
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Standard Grant

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