LTREB: Moose Population Cycles, Ecosystem Properties, and Landscape Patterns on Isle Royale

LTREB:皇家岛上的驼鹿种群周期、生态系统特性和景观格局

基本信息

  • 批准号:
    9806313
  • 负责人:
  • 金额:
    $ 30万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1998
  • 资助国家:
    美国
  • 起止时间:
    1998-07-15 至 2004-09-30
  • 项目状态:
    已结题

项目摘要

9806313 Pastor The difficulties in developing a general theory of herbivore-ecosystem interactions arise from the long time-scales of population cycles, the complex spatial scaling of interactions between animal and plant populations, and thenon-linear effect of herbivores on carbon and nutrient flows between vegetation and soil. Such theoretical difficulties are compounded by the paucity of long-term, landscape-scale studies. This LTREB research will continue to address these problems by examining the spatial distribution of browse consumption by moose (Alces alces) in relation to browse supply, tree diameter distributions, conifer basal area, and soil nitrogen availability in the boreal forests of two valleys on Isle Royale. A series of alternative hypotheses will be tested: One series of hypotheses states that spatial patterns do not determine ecosystem recovery from the prior period of high moose population densities, while the alternative series of hypotheses invoke a central role of the dynamics of spatial patterns in ecosystem recovery. Changes in mean values of each ecosystem property will be tested by examining trends at grid points through time. This long-term research program covers a period of time in which the system has experienced the both the largest and smallest moose population densities. These extremes in population dynamics will provide valuable information on the effects of herbivores on large-scale plant community dynamics and ecosystem processes.
9806313 Pastor 发展食草动物与生态系统相互作用的一般理论的困难源于人口周期的长时间尺度、动物和植物种群之间相互作用的复杂空间尺度,以及食草动物对植被和土壤之间碳和养分流动的非线性影响。由于缺乏长期的、景观规模的研究,这些理论困难变得更加复杂。 LTREB 的这项研究将继续解决这些问题,通过研究驼鹿 (Alces alces) 采食消耗的空间分布与采食供应、树木直径分布、针叶树断面积和皇家岛两个山谷的北方森林中土壤氮可用性的关系。将测试一系列替代假设:一系列假设指出,空间模式并不决定生态系统从驼鹿种群密度较高的前期恢复,而一系列替代假设则提出了空间模式动态在生态系统恢复中的核心作用。将通过检查网格点随时间变化的趋势来测试每个生态系统属性平均值的变化。这项长期研究计划涵盖了该系统经历了最大和最小驼鹿种群密度的一段时间。这些极端的种群动态将为食草动物对大规模植物群落动态和生态系统过程的影响提供有价值的信息。

项目成果

期刊论文数量(0)
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会议论文数量(0)
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John Pastor其他文献

Northward march of spruce
云杉北移
  • DOI:
    10.1038/361208a0
  • 发表时间:
    1993-01-01
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    John Pastor
  • 通讯作者:
    John Pastor
Multiple limiting gradients in peatlands: A call for a new paradigm
  • DOI:
    10.1007/bf03160645
  • 发表时间:
    1996-03-01
  • 期刊:
  • 影响因子:
    2.000
  • 作者:
    Scott D. Bridgham;John Pastor;Jan A. Janssens;Carmen Chapin;Thomas J. Malterer
  • 通讯作者:
    Thomas J. Malterer
Interactions between sulfide and reproductive phenology of an annual aquatic plant, wild rice (<em>Zizania palustris</em>)
  • DOI:
    10.1016/j.aquabot.2020.103230
  • 发表时间:
    2020-05-01
  • 期刊:
  • 影响因子:
  • 作者:
    Sophia LaFond-Hudson;Nathan W. Johnson;John Pastor;Brad Dewey
  • 通讯作者:
    Brad Dewey
Ecology of ice-age extinctions
冰河时代物种灭绝的生态学
  • DOI:
    10.1038/431639a
  • 发表时间:
    2004-10-06
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    John Pastor;Ron A. Moen
  • 通讯作者:
    Ron A. Moen
A Primer on Mathematical Models in Biology by Lee A. Segel and Leah Edelstein-Keshet
  • DOI:
    10.1007/s00283-014-9446-4
  • 发表时间:
    2014-02-28
  • 期刊:
  • 影响因子:
    0.400
  • 作者:
    John Pastor
  • 通讯作者:
    John Pastor

John Pastor的其他文献

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{{ truncateString('John Pastor', 18)}}的其他基金

Collaborative Research: OPUS: Beavers as Boreal Ecosystem Engineers
合作研究:OPUS:海狸作为北方生态系统工程师
  • 批准号:
    1349076
  • 财政年份:
    2014
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
OPUS: A Synthesis Of Long-Term Research On Moose-Boreal Forest Interactions
OPUS:驼鹿与北方森林相互作用的长期研究综述
  • 批准号:
    0640325
  • 财政年份:
    2007
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Wild Rice Population Oscillations, Allocation Patterns, and Nutrient Cycles
野生稻种群波动、分配模式和养分循环
  • 批准号:
    0715808
  • 财政年份:
    2007
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
LTREB: Spatial Dynamics of the Moose-Forest-Soil Ecosystem on Isle Royale
LTREB:皇家岛驼鹿-森林-土壤生态系统的空间动态
  • 批准号:
    0414260
  • 财政年份:
    2004
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Collaborative Research: Interactions Among Global Change Stressors in Northern Fens: Atmospheric CO2, Temperature, and Nitrogen Deposition
合作研究:北部沼泽全球变化压力源之间的相互作用:大气二氧化碳、温度和氮沉降
  • 批准号:
    0235266
  • 财政年份:
    2003
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Wild Rice Population Dynamics and Nutrient Cycles
野生稻种群动态和养分循环
  • 批准号:
    0211691
  • 财政年份:
    2002
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Control of Productivity and Plant Species Segregation by Nitrogen Fluxes to Wetland Beaver Meadows
湿地河狸草甸氮通量对生产力和植物物种分离的控制
  • 批准号:
    9615326
  • 财政年份:
    1997
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Collaborative Research: Grizzly Bear Digging in Subalpine Meadows: Influences on Plant Distributions and Nitrogen Availability
合作研究:灰熊在亚高山草甸挖掘:对植物分布和氮素有效性的影响
  • 批准号:
    9510447
  • 财政年份:
    1995
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Moose Foraging Strategy, Energetics, and Ecosystem Processes in Boreal Landscapes
北方景观中驼鹿的觅食策略、能量学和生态系统过程
  • 批准号:
    9420064
  • 财政年份:
    1995
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
LTREB: Long-term Dynamics of Moose Populations, Community Structure, and Ecosystem Properties on Isle Royale
LTREB:皇家岛驼鹿种群、群落结构和生态系统特性的长期动态
  • 批准号:
    9306368
  • 财政年份:
    1993
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant

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预测云杉芽虫和驼鹿管理对景观范围内碳储量的影响
  • 批准号:
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