Post-Fire Hydrology, Biogeochemistry, and Vegetation Response

火灾后水文、生物地球化学和植被响应

基本信息

  • 批准号:
    0327071
  • 负责人:
  • 金额:
    $ 9.42万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2004
  • 资助国家:
    美国
  • 起止时间:
    2004-02-01 至 2006-01-31
  • 项目状态:
    已结题

项目摘要

0327071MeixnerA stand-replacing wildfire burned through the San Dimas Experimental Forest (SDEF) this past September. The SDEF has a 60-year record of watershed hydrology and a 20-year record of watershed nitrogen export for several watersheds. The intense understanding of pre-fire conditions at the SDEF presents a once in a lifetime opportunity to closely investigate the impacts of fire as an ecological disturbance in a chaparral ecosystem. Existing data at SDEF indicates that watersheds with more frequent fires have reduced streamflow and inorganic nitrogen export on long timescales compared to watersheds with less frequent fires. This existing data is especially important because it indicates an interaction between disturbance regime and the susceptibility of ecosystems to atmospheric deposition. More generally our results will be relevant to understanding disturbance in ecosystems and disturbance influences on hydrologic and biogeochemical processes. We intend to investigate four major questions in this post-fire environment. First, we will determine the relative control of fire frequency on sediment and nutrient export with an observational network and process based studies. Second, we will investigate the impact of changes in ET on watershed hydrology in the post-fire environment with a robust observation network. This observation system consists of several watersheds that were burned during the 1980's as part of a prescribed fire experiment as well as several control watersheds. Third, we will investigate how the high rates of N deposition influence vegetation recovery in the post-fire environment with vegetation surveys at SDEF and at a low deposition site in southern California. Finally, we will investigate how fire history affects watershed hydrologic and biogeochemical export. We will also prepare the ground for future studies with detailed assessment of digital elevation data at the forest taking advantage of fire to collect both on the ground and remotely sensed data as well as with preliminary measurements of ET with an eddy-flux system with time and equipment donated by the University of California, Irvine.Broader ImplicationsThe pre-existing facilities and experimental framework (detailed fire history with differences between watersheds) provide a truly unique opportunity to investigate the impact of fire on the amount of water available for human use and the impacts of fire on water quality. Since fire is such a dominant ecosystem process in many ecosystems of the western United States, better information on the impact of fire on water resources and water quality is critical information for land managers. The research will also provide information on how air pollution and disturbance interact and influence the large-scale vegetation change currently occurring in California that threatens the unique biodiversity of the region. . Additionally the location of the San Dimas Experimental Forest in southern California with its diverse population and numerous undergraduate institutions provide a perfect opportunity for outreach to underrepresented groups in the environmental sciences: urban populations and minorities. The University of California, Riverside and Long Beach State University both serve predominantly minority populations.
0327071梅克斯纳今年9月,一场取代看台的野火烧毁了圣迪马斯实验森林(SDEF)。 SDEF拥有60年的流域水文记录和20年的流域氮输出记录。 对SDEF火灾前条件的深入了解提供了一个千载难逢的机会,可以密切调查火灾作为查帕拉尔生态系统中的生态干扰的影响。 SDEF的现有数据表明,与火灾频率较低的流域相比,火灾频率较高的流域在长时间尺度上减少了径流和无机氮的输出。 这一现有数据特别重要,因为它表明了扰动状况与生态系统对大气沉降的敏感性之间的相互作用。 更一般地说,我们的研究结果将是相关的了解生态系统中的干扰和干扰对水文和地球化学过程的影响。 我们打算在这个火灾后的环境中调查四个主要问题。 首先,我们将通过观测网络和基于过程的研究确定火灾频率对沉积物和营养物输出的相对控制。 其次,我们将调查在火灾后的环境与强大的观测网络流域水文ET的变化的影响。 该观测系统由20世纪80年代作为规定的火灾实验的一部分被烧毁的几个流域以及几个控制流域组成。 第三,我们将调查如何高速率的N沉积影响植被恢复在火灾后的环境与植被调查在SDEF和低沉积的网站在南加州。 最后,我们将调查火灾历史如何影响流域水文和地球化学输出。 我们还将为未来的研究做好准备,详细评估森林的数字高程数据,利用火灾收集地面和遥感数据,并利用加州大学捐赠的时间和设备,更广泛的含义预先存在的设施和实验框架(详细的火灾历史,流域之间的差异)提供了一个真正独特的机会,调查火灾对人类可用水量的影响和火灾对水质的影响。 由于火灾是美国西部许多生态系统的主要生态系统过程,因此更好地了解火灾对水资源和水质的影响对土地管理人员至关重要。 该研究还将提供有关空气污染和干扰如何相互作用和影响加州目前发生的大规模植被变化的信息,这些变化威胁到该地区独特的生物多样性。 . 此外,圣迪马斯实验森林位于加州南部,人口多样,本科院校众多,为接触环境科学领域代表性不足的群体提供了绝佳的机会:城市人口和少数民族。 加州大学、滨江大学和长滩州立大学都主要为少数族裔人口服务。

项目成果

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Edith Allen其他文献

The Relationship Between Periodontitis and Glycaemic Control in Type 2 Diabetes
牙周炎与 2 型糖尿病血糖控制之间的关系
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Edith Allen;Iain L C Chapple
  • 通讯作者:
    Iain L C Chapple

Edith Allen的其他文献

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{{ truncateString('Edith Allen', 18)}}的其他基金

DISSERTATION RESEARCH: Do tradeoffs between water use efficiency and growth explain plant community response to nitrogen deposition?
论文研究:水分利用效率和生长之间的权衡是否可以解释植物群落对氮沉降的反应?
  • 批准号:
    1501110
  • 财政年份:
    2015
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Determining the source of atmospheric nitrogen through the analysis of nitrogen and oxygen isotopes in passively collected dry deposition
论文研究:通过分析被动收集的干沉积物中的氮和氧同位素来确定大气氮的来源
  • 批准号:
    1110832
  • 财政年份:
    2011
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
Thresholds of Vegetation Change Following N Deposition in Southern California Ecosystems
南加州生态系统氮沉积后植被变化的阈值
  • 批准号:
    0421530
  • 财政年份:
    2005
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
CRB: Restoring Seasonal Tropical Forests in Mexico: Using Designer Communities to Direct Succession
CRB:恢复墨西哥季节性热带森林:利用设计师社区指导继承
  • 批准号:
    9981607
  • 财政年份:
    2000
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
Cross-Site: Collaborative Research: Mycorrhizal Responses to Nitrogen Eutrophication at Five Mesic to Semiarid Sites
跨站点:合作研究:五个中等到半干旱地区菌根对氮富营养化的反应
  • 批准号:
    9526564
  • 财政年份:
    1996
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
CRB: Restoration of Plants and Mycorrhizae in Mexico Seasonal Tropical Forest
CRB:墨西哥季节性热带森林植物和菌根的恢复
  • 批准号:
    9622352
  • 财政年份:
    1996
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
CRB: Workshop on Developing the Conceptual Basis for Restoration Biology, to be held in Santa Barbara on April 19-21, 1996
CRB:关于开发恢复生物学概念基础的研讨会,将于 1996 年 4 月 19-21 日在圣巴巴拉举行
  • 批准号:
    9628763
  • 财政年份:
    1996
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
SGER: The Interactions of Nitrogen Eutrophication and Fire on Invasive Annuals in California Coastal Sage Shrublands
SGER:氮富营养化和火灾对加州沿海鼠尾草灌木丛入侵一年生植物的相互作用
  • 批准号:
    9408079
  • 财政年份:
    1994
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant
Collaborative Research: Patch Formation and Mycorrhizal Colonization During Succession on Glacial Till
合作研究:冰川耕种演替过程中的斑块形成和菌根定植
  • 批准号:
    9496046
  • 财政年份:
    1993
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Continuing Grant
Dissertation Research: Rhizosheath Formation and Hydraulic Lift in Indian Ricegrass: Rhizosphere Composition and Nitrogen Fixation
论文研究:印度稻草的根鞘形成和水力提升:根际组成和固氮
  • 批准号:
    9212824
  • 财政年份:
    1992
  • 资助金额:
    $ 9.42万
  • 项目类别:
    Standard Grant

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