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Project ID: 00-1-1-03

Year: 2001

Date Started: 01/05/2001

Date Completed: 09/04/2005

Title: Changing Fire Regimes, Increased Fuel Loads, and Invasive Species: Effects on Sagebrush Steppe and Pinyon-Juniper Ecosystems

Project Proposal Abstract: Pinyon juniper woodlands and Wyoming big sagebrush ecosystems have undergone major changes in vegetation structure and composition since settlement by European Americans. These changes are resulting in dramatic shifts in fire frequency, size and severity. Effective management of these systems has been hindered by lack of information on: (1) presettlement fire regimes and the spatial and temporal changes that have occurred in Jntermountain Region woodlands and sagebrush steppe ecosystems, (2) changing fuel loads and the consequences for the ecosystem types and conditions that currently exist on the landscape, and (3) the environmental and ecological factors that influence community susceptibilty to invasive species. We propose to conduct an integrated research program that addresses each of these information needs. The first component will evaluate the spatial and temporal dynamics of the shrublands and woodlands prior to settlement by using a combination of plant community, stand structure, and dendrochronology data. It also examines the influence of varying environmental conditions and invasive species on current shrubland and woodland dynamics. The second component is closely aligned with the first. It evaluates the changes that have occurred in fuel loads since settlement and provides a comparison of the fuel loading characteristics for ecosystems that are functional, at risk, or that have been converted to annual grasses or secondary weeds, or revegetated. The third component uses mechanistic studies to examine key factors influencing community susceptibility to invasion by cheatgrass (Bromus tectorum) and the secondary weeds, squarrose knapweed (Centaurea virgata var. squarrosa) and Rush skeleton weed (Chondrillajuncea). It examines temporal differences in resource availability (soil water and nutrients) among vegetation types and states. It also evaluates the effects of plant abundance of existing species and fire on soil resource availability and cheatgrass establishment and reproduction, and the effects of fire on secondary weed establishment and spread. This research will provide both regional and local information on characteristics of woodlands and shrublands at greatest risk of catastrophic fire, most susceptible to cheatgrass invasion, as well as most suitable for prescribed fire. It will also provide information on the effects of resource availability, community condition, and fire on community susceptibility to cheatgrass and secondary weed invasion

Principal Investigator: Jeanne C. Chambers

Agency/Organization: Forest Service

Branch or Dept: RMRS-Forestry Sciences Lab-Reno


Other Project Collaborators

Type

Name

Agency/Organization

Branch or Dept

Co-Principal Investigator

Robert R. Blank

ARS-Agricultural Research Service

Great Basin Rangelands Research Unit

Co-Principal Investigator

Stephen C. Bunting

University of Idaho

Rangeland Ecology & Management

Co-Principal Investigator

James P. Dobrowolski

Utah State University

Department of Wildland Resources

Co-Principal Investigator

Pat Fosse

BLM-Bureau of Land Management

Fillmore Field Office

Co-Principal Investigator

E. Durant McArthur

Forest Service

RMRS-Shrub Sciences Laboratory

Co-Principal Investigator

Susan E. Meyer

Forest Service

RMRS-Shrub Sciences Laboratory

Co-Principal Investigator

Richard R. Miller

Oregon State University

Eastern Oregon Agricultural Research Center

Co-Principal Investigator

Steve B. Monsen

Uncompahgre Plateau Native Seed Project

Co-Principal Investigator

Mike L. Pellant

BLM-Bureau of Land Management

Idaho State Office

Co-Principal Investigator

Bruce A. Roundy

Brigham Young University

Department of Plant & Wildlife Sciences

Co-Principal Investigator

Nancy L. Shaw

Forest Service

RMRS-Aquatic Sciences Lab

Co-Principal Investigator

Robin J. Tausch

Forest Service

RMRS-Forestry Sciences Lab-Reno

Co-Principal Investigator

Scott C. Walker

Utah

Great Basin Research Center

Federal Cooperator

Jeanne C. Chambers

Forest Service

RMRS-Forestry Sciences Lab-Reno


Project Locations

Consortium

Great Basin


There are no project locations identified for this project.

Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

  ID Type Title
    52 Book Modeling Threats to Sagebrush and Other Shrubland Communities (Chapter 4 of Habitat Threats in the Sagebrush Ecosystem: Methods of Regional Assessment and Applications in the Great Basin)
    1676 Government Publication A series of technical bulletins on all aspects of the study that are potentially useful for developing management prescriptions for fire and non-fire treatments to control and manage invasions.
    3163 Journal Article Structure and Development of Expanding Western Juniper Woodlands as Influenced by Two Topographic Variables
view or print   211 MS Thesis Western Juniper Succession: Changing Fuels and Fire Behavior (C. Yanish)
    489 Dataset (including spatial) Data on the characteristics of communities that are potentially susceptible to cheatgrass or secondary weed invasion and guidelines for their management.
    490 Dataset (including spatial) Data on the effects of both fire and disturbance that decrease native plant abundance on cheatgrass and secondary weed invasion.
    3026 Conference/Symposia/Workshop Western Juniper Succession: Changing Fuels and Fire Behavior
    3027 Invited Paper/Presentation Defining and Evaluating Ecosystem Recovery
    3083 Invited Paper/Presentation Pinyon-Juniper, Sagebrush, and Fire
    3084 Invited Paper/Presentation Climate and Vegetation Change During the Holocene: Implications for Present and Future Changes
    3085 Invited Paper/Presentation Implications of Management, Weed Invasion, and Climate on Fire in Pinyon-Juniper Communities
    3086 Invited Paper/Presentation Sagebrush - Woodland Conversion: Long-Term Great Basin Changes
    3087 Invited Paper/Presentation Sagebrush - Woodland Conversion: Long-Term Great Basin Changes
    3320 Conference/Symposia/Workshop Effects of Fire and Restoration Seeding on Establishment of Squarrose Knapweed (Centaurea virgata var. Squarrosa)
    2173 Conference/Symposia/Workshop Seed Dispersal of Squarrose Knapweed [Centaurea virgata ssp. Squarrosa (Willd.) Gugler]
    2174 Conference/Symposia/Workshop Effects of Herbaceous Species Removal, Fire and Cheatgrass (Bromus tectorum) on Soil Water Availability in Sagebrush Steppe
    2588 Book or Book Chapter Modeling Threats to Sagebrush and Other Shrubland Communities (Chapter 4 of Habitat Threats in the Sagebrush Ecosystem: Methods of Regional Assessment and Applications in the Great Basin)
    2589 Book or Book Chapter Using Ecological Theory to Manage or Restore Ecosystems Affected by Invasive Plant Species
    1871 Conference/Symposia/Workshop Recent Developments and Applications of Fire Behavior Models
    1872 Conference/Symposia/Workshop A Device and Technique for Conducting Small-Plot Burns
    1873 Conference/Symposia/Workshop Western Juniper Succession: Changing Fuels and Fire Behavior
    1874 Conference/Symposia/Workshop The Changing Role of Fire in Sagebrush and Juniper Woodlands
    1875 Conference/Symposia/Workshop Effects of Herbaceous Species Removal, Fire, and Cheatgrass (Bromus tectorum) on Nutrient Availability in Sagebrush Steppe
    1876 Conference/Symposia/Workshop Woodland Expansion, Stand Dynamics and Fuel Loads in Western Juniper Woodlands
    2113 Conference/Symposia/Workshop Effects of Herbaceous Species Removal, Fire and Cheatgrass (Bromus tectorum) on Soil Water Availability in Sagebrush Steppe
    2114 Conference/Symposia/Workshop Seed Ecology of Rush Skeletonweed (Chondrilla juncea L.) Following Wildfire on Idaho’s Snake River Plain
    2115 Conference/Symposia/Workshop Invasion of Rush Skeletonweed (Chondrilla juncea L.) Into Sagebrush Communities
    1919 Conference/Symposia/Workshop Western Juniper Ecology and Woodland Expansion
    1920 Conference/Symposia/Workshop Fire in the Sagebrush Biome: Creating Fire Resilient Landscapes
    1921 Conference/Symposia/Workshop Managing Avian Populations at the Landscape Level: Considering Time and Space
    1922 Conference/Symposia/Workshop Fire in the Sagebrush Biome
    1923 Conference/Symposia/Workshop Western Juniper Succession: Changing Fuels and Fire Behavior
    1924 Conference/Symposia/Workshop Susceptibility of Sagebrush Communities to Cheatgrass (Bromus tectorum): Effects of Native Herbaceous Species and Fire
    2166 Conference/Symposia/Workshop Implications of Management, Weed Invasion, and Climate on Fire in Pinyon-Juniper Communities
    2167 Conference/Symposia/Workshop Seed Ecology of Rush Skeletonweed (Chondrilla juncea L.) Following Wildfire on Idaho’s Snake River Plain
    2168 Conference/Symposia/Workshop Recruitment of Rush Skeletonweed (Chondrilla juncea L.) Following Wildfire on Idaho’s Lower Snake River Plain
    2169 Conference/Symposia/Workshop Post-Fire Recruitment of Rush Skeletonweed (Chondrilla juncea L.) on Idaho’s Snake River Plain
    2170 Conference/Symposia/Workshop Rush Skeletonweed Research Update
    2171 Conference/Symposia/Workshop Post-Fire Seed Ecology of Rush Skeletonweed (Chondrilla juncea L.) on Idaho’s Snake River Plain
    2172 Conference/Symposia/Workshop Post-Fire Seed Ecology of Rush Skeletonweed (Chondrilla juncea L.) on Idaho’s Snake River Plain
    6775 Invited Paper/Presentation Vegetation Dynamics and Ecosystem Change in Great Basin Pinyon/Juniper Woodlands: Implications for the Future
    6780 Invited Paper/Presentation Using Post-Fire Revegetation to Control Invasive Plants in Sagebrush and Pinyon-Juniper Woodlands
    5731 Conference/Symposia/Workshop Woodland Expansion, Stand Dynamics and Fuel Loads in Single-Needle Pinyon (Pinus monophylla) and Utah Juniper (Juniperus osteosperma) Woodlands
    5733 Conference/Symposia/Workshop Germination Potential of Cheatgrass in Relation to Disturbance
    5734 Conference/Symposia/Workshop The Impacts of Woodland Expansion and Fire in Mountain Big Sagebrush Communities
    5735 Conference/Symposia/Workshop Woodland Expansion, Stand Dynamics and Fuel Loads in Single-Leaf Pinyon and Utah Juniper Woodlands
    5334 Conference/Symposia/Workshop Invasion of Rush Skeletonweed (Chondrilla juncea L.) into Sagebrush Communities on the Snake River Plain
    5335 Conference/Symposia/Workshop Assessing the Invasion of Rush Skeletonweed (Chondrilla juncea L.) into Steppe Communities of the Snake River Plain
    5336 Conference/Symposia/Workshop Invasibility of Sagebrush Communities by Cheatgrass (Bromus tectorum): Effects of Native Herbaceous Species and Fire
    5337 Conference/Symposia/Workshop Biomass, Fuel-Loading and Community Relations on a Trans-Mountain Transect, East Tintic Mountains, Utah
    5338 Conference/Symposia/Workshop Post-Fire Seed Ecology of Rush Skeletonweed (Chondrilla juncea L.) on Idaho’s Snake River Plain
    5339 Invited Paper/Presentation Interactions of Climate, Increasing Tree Dominance, Weed Invasion, and Fire in Pinyon-Juniper Communities
    5936 Conference/Symposia/Workshop Environmental Factors Influencing Woodland Dynamics
    5937 Conference/Symposia/Workshop Woodland Expansion, Fire and Fuel Loads
    5938 Conference/Symposia/Workshop Effects of Herbaceous Species Removal, Fire and Cheatgrass (Bromus tectorum) on Nutrient Availability in Sagebrush Steppe
    5357 Dataset (including spatial) Comparative data on the fuel loads and fire susceptibility of intact communities, communities revegetated with introduced and native species, and communities invaded by cheatgrass of secondary weeds.
    5980 Conference/Symposia/Workshop Identification of Presettlement and Recently Expanded Pinyon and Juniper Woodlands
    5981 Conference/Symposia/Workshop Rush Skeletonweed (Chondrilla juncea L.) Recruitment Following Wildfire on Idaho’s Snake River Plain

Supporting Documents

The following supporting documents are available for this project.

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Brief


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