## Breadcrumb

-  Forest and Rangeland Ecosystem Science Center 
-  Science 

#           Ecology of Rare and Declining Species and Communities of Conservation Concern      

  Active

      By Forest and Rangeland Ecosystem Science Center      November 7, 2017    

            -              Overview           
            -              Data           
            -              Publications           

Special status species and habitats are often sentinels of accelerated ecosystem change and, by definition, are priorities for protection, restoration, or focused management.

For many species with special status designations, robust information about the basic ecology and habitat associations is lacking. Additionally, designation of special status frequently raises the legal and political profile of these species and habitats, amplifying managers' need for scientifically sound and defensible information. My research program focuses on providing this information by expanding understanding of basic ecology, as well as investigating interactions among limiting factors, ecosystem change, and anthropogenic stresses.

For example, one project is providing new information on the distribution and habitat associations of the American Pika on the west slope of the Oregon Cascade Range. Other projects are investigating patterns of biodiversity in and the effects of restoration on oak habitats and their unique species assemblages in western Oregon. Important information needed to support management decisions include accurate maps of oak-habitat types, increased understanding of how distribution and condition of habitat patches influence use by associated wildlife, and evaluations of wildlife response to land use and restoration at spatial scales from patch to landscape.

### Contacts

#### Joan C Hagar

##### Research Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

joan_hagar@usgs.gov

541-750-0984

### Explore Search

                      - Ecology
                      - Sensitive Species
                      - Drought
                      - Habitat Loss
                      - Native Plants
                      - Species Status Assessments
                      - Terrestrial Mammals
                      - Threatened and Endangered Species
                      - Listed Species and Species of Management Concern
                      - Threats
                      - Wildlife and Terrestrial Species
                      - Biology
                      - Ecosystems
                      - Wildlife & Terrestrial Species
                      - Threatened and Endangered
                      - native plants

View All **

Below are data or web applications associated with this project.

June 5, 2018

####                 Estimated Probabilities from Lidar Models for Marbled Murrelet (Brachyramphus marmoratus) Occupancy in Forest Vegetation Stands in the Siuslaw National Forest, Oregon              

Forest and Rangeland Ecosystem Science Center

Below are publications associated with this project.

December 3, 2020

####                 Western purple martin (Progne subis arboricola) occurrence on the Siuslaw National Forest, Summer 2019              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

March 28, 2018

####                 Modeling habitat for Marbled Murrelets on the Siuslaw National Forest, Oregon, using lidar data              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

May 24, 2013

####                 Survey of bats on Columbia National Wildlife Refuge, Washington, December 2011-April 2012              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

October 16, 2012

####                 Summary of bird-survey and banding results at W.L. Finley National Wildlife Refuge, 1998-2008              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, Bird Banding Laboratory

January 1, 2011

####                 Use of non-alpine anthropogenic habitats by American pikas (*Ochotona princeps*) in western Oregon, USA              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

Special status species and habitats are often sentinels of accelerated ecosystem change and, by definition, are priorities for protection, restoration, or focused management.

For many species with special status designations, robust information about the basic ecology and habitat associations is lacking. Additionally, designation of special status frequently raises the legal and political profile of these species and habitats, amplifying managers' need for scientifically sound and defensible information. My research program focuses on providing this information by expanding understanding of basic ecology, as well as investigating interactions among limiting factors, ecosystem change, and anthropogenic stresses.

For example, one project is providing new information on the distribution and habitat associations of the American Pika on the west slope of the Oregon Cascade Range. Other projects are investigating patterns of biodiversity in and the effects of restoration on oak habitats and their unique species assemblages in western Oregon. Important information needed to support management decisions include accurate maps of oak-habitat types, increased understanding of how distribution and condition of habitat patches influence use by associated wildlife, and evaluations of wildlife response to land use and restoration at spatial scales from patch to landscape.

### Contacts

#### Joan C Hagar

##### Research Wildlife Biologist

Forest and Rangeland Ecosystem Science Center

joan_hagar@usgs.gov

541-750-0984

### Explore Search

                      - Ecology
                      - Sensitive Species
                      - Drought
                      - Habitat Loss
                      - Native Plants
                      - Species Status Assessments
                      - Terrestrial Mammals
                      - Threatened and Endangered Species
                      - Listed Species and Species of Management Concern
                      - Threats
                      - Wildlife and Terrestrial Species
                      - Biology
                      - Ecosystems
                      - Wildlife & Terrestrial Species
                      - Threatened and Endangered
                      - native plants

View All **

Below are data or web applications associated with this project.

June 5, 2018

####                 Estimated Probabilities from Lidar Models for Marbled Murrelet (Brachyramphus marmoratus) Occupancy in Forest Vegetation Stands in the Siuslaw National Forest, Oregon              

Forest and Rangeland Ecosystem Science Center

Below are publications associated with this project.

December 3, 2020

####                 Western purple martin (Progne subis arboricola) occurrence on the Siuslaw National Forest, Summer 2019              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

March 28, 2018

####                 Modeling habitat for Marbled Murrelets on the Siuslaw National Forest, Oregon, using lidar data              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

May 24, 2013

####                 Survey of bats on Columbia National Wildlife Refuge, Washington, December 2011-April 2012              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

October 16, 2012

####                 Summary of bird-survey and banding results at W.L. Finley National Wildlife Refuge, 1998-2008              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center, Bird Banding Laboratory

January 1, 2011

####                 Use of non-alpine anthropogenic habitats by American pikas (*Ochotona princeps*) in western Oregon, USA              

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center