Disturbance

REU Opportunity on Post-Fire Impacts on Streamflow and Riparian Zones

News Brief Description: 

Title: Research Experience for Undergraduates in post-fire impacts on streamflow and riparian zones

Position period:  June 18 – August 27 , 2026

Location: H.J. Andrews Experimental Forest, Blue River, Oregon and Oregon State University, Corvallis, Oregon

Description of project: This research project is supported by the National Science Foundation’s Long-Term Ecological Research grant at the H.J. Andrews Experimental Forest and is led by the Segura Watershed Processes Lab at Oregon State University (https://people.forestry.oregonstate.edu/catalina-segura/). The study will build on the active work of this group to understand how post-fire effects on the landscape influence streamflow through canopy cover, nutrient availability, vegetation shifts, and groundwater flow. The goal is to understand fire influences on summer streamflow instream nutrient concentrations and isotope variability. We will take water samples from 12 stream locations in the study area weekly during the REU term to study nutrient concentration as well as water stable isotope analysis. This data will inform a research project developed with the student(s) to answer a research question regarding fire impacts on riparian areas. We will also participate in three other research projects while in the field, such as a fish survey, large wood survey, and synoptic sampling campaign along stream mainstems. In all, this will provide opportunities to see a wide breadth of forest hydrology research.

Duties will include: 1) instream water sampling (isotopes, DOC/NO3, cations and anions), 2) pilot large wood survey along two stream mainstems, 3) data retrieval and maintenance of temperature loggers and other stream loggers, 4) field site characterization, 5) hiking through difficult, steep terrain with gear 6) data entry and organization, 7) and finally, data synthesis and presentation.

This internship will provide the undergraduate student(s) an opportunity to participate in 10 weeks of mentored, paid, independent research. The student(s) will interact with scientists, university faculty, federal scientists, and graduate students conducting research in the area. Participant(s) will work closely with faculty mentor Dr. Catalina Segura and graduate student mentors Maeve Bittle (MS) and Stalin Guamán (PhD). The REU student will conduct supervised and guided research and be encouraged to tailor the research project to their own interests.

What is provided: Apartment-style, shared-room housing is provided at the HJ Andrews Experimental Forest field station. The field station is located in the Willamette National Forest near Blue River, OR and provides access to great hiking and mountain biking trails, swimming holes, and hot springs.

This position lasts for 10 weeks, June 18 through August 27, 2026, ~40 hours/week. The REU intern will be responsible for 1) meeting all requirements of the mentors and 2) writing a final research report on the research experience. Housing and a stipend of $6,000 will be provided. There are funds to defray the cost of traveling to the H. J. Andrews Experimental Forest. Please note that the REU program is considered an educational program rather than employment; therefore, Oregon State University (OSU) does not provide Worker’s Compensation insurance coverage nor medical insurance on your behalf. You are responsible for your own health insurance coverage.

Position requirements: Applicants should have a valid driver’s license, the ability to carry a heavy pack (40+ lb) for moderate distances (5+ mi) over uneven, mountainous terrain, and be comfortable spending long days on their feet in the field. The position will involve working early mornings and in hot, dry weather. Applicants should have a strong work ethic, be self-motivated, and comfortable with working in remote areas. Being a team player is necessary for the group work/living situation. The ability to adapt to a variable work schedule is also necessary. Our streams are on steep mountain slopes and reaching them sometimes means climbing down hillslopes and through thick undergrowth. Eligibility is limited to currently enrolled undergraduates that have a graduate date no sooner than fall 2026. All applicants must be U.S. Citizens or permanent residents. Women, underrepresented minorities, and persons with disabilities are especially encouraged to apply. We strongly recommend the student have a personal vehicle to use during their time in Oregon.

To apply: Please prepare and submit a 1 page resume, transcripts (unofficial are acceptable) and 2 professional references (names, phone number, and email address) to this google form. The form will also request the following information:

  1. Basic education information
  2. Statement of Interest: Briefly describe your post-graduate plans and career goals, and specify your reasons for wanting to participate in this internship program (300 words max)
  3. Data Analysis Experience
  4. Natural Resources Skills and Experience (field, research, professional, etc.): Explain any past experiences or specialized skills that may be relevant to this project, such as field or lab experience, equipment or software you have used, etc. (example: experience from coursework, individual study projects) (300 words max)

Only complete applications will be considered. Review of applications will start March 30th, 2026 and continue until a suitable candidate is identified.

Thirtieth anniversary of 1996 floods

News Brief Description: 

This weekend (Feb 6-8, 2026) marks the 30th anniversary of the major flood of 1996, which was one of the largest flows in the recorded history of Lookout Creek in the H.J. Andrews Experimental Forest (HJA). The flood caused damage and destruction to communities across the Northwest--at its peak, the Willamette River came within a foot of overtopping the walls and flooding downtown Portland, Oregon.  At the start of the storm over a foot of snow was at the HJA headquarters site and over the several days of the storm an additional foot of rain fell, melting the snow, feeding the flood.  Gordon Grant took video at several places in and near Andrews, and segments were incorporated in Alan Honick's video, Torrents of Change. Research following the flood showed dramatic change in characteristics of streams and riparian zones, but also amazing resilience of components of the stream ecosystem. Rain-on-snow floods like the 1996 event are the largest floods not just in the PNW, but nationally, and the Andrews Forest long-term data provides unique insights into what causes these floods. 

Debris flows on roads at the HJA Dec 2025

News Brief Description: 

Multiple debris flows occured at the HJ Andrews Experimental Forest this week, following heavy rains. On-site staff noted a few debris flows that had deposited trees and soil over roads. Travel on impacted roadways at the HJA will impossible until early 2026. At this point, headquarters has not been impacted and can be reached. Contact the Forest Director if you have plans to do field work in watersheds 9,10,1,2, or 3--which are beyond the impacted road sections.

MS Defense: “Douglas-fir and Western Hemlock Responses to Extreme Heat”

Event Date: 
Thursday, December 4, 2025
Event Brief Description: 

MS Defense. Gabby John. Dec 4 at 2 PM. “Douglas-fir and Western Hemlock Responses to Extreme Heat.” Co-advised by Drs. Chris Still and Mark Schulze, Gabby’s thesis project utilizes high-resolution microclimate and tree expansion data from the H.J. Andrews Experimental Forest to understand the extent to which the 2021 PNW Heat Dome affected tree growth. Peavy 125 and zoom.

Andrews Forest Monthly Meeting February 2025

Event Date: 
Friday, February 7, 2025
Event Brief Description: 

Andrews Forest Monthly Meeting: Friday, January 10,  9-11 AM

Presentations:

  • Examining changing spatial patterns in forest canopy gap formation with landscape disturbance” presented David M Bell, Research Forester, USDA Forest Service PNW Research Station.
  • Climate mediated increases in background mortality in temperate rainforests of the Pacific Northwest” presented by Ella Gray, Postdoctoral Scholar, FERM (w/ Dave Bell & Matt Powers)

After our presentations, at 10 AM, we will move into our community meeting, which includes updates on graduate student activities, site, WNF, community enhancement, education, new faces, and recent publications.

Peavy 315, Oregon State University.  Contact Lina DiGregorio for zoom option.

Our meetings follow the academic year. Upcoming meetings: Feb 7, Mar 7, April 4, May 2, June 6.

Watershed Responses to Disturbance

As climate change intensifies, natural disturbances are dramatically reshaping ecosystems. This is especially prevalent across the western United States, particularly in vulnerable mountain regions with complex landscapes and tightly linked land-water systems. In this study, we examine how disturbances—whether sudden events like wildfires and bark beetle outbreaks, or ongoing pressures like reduced snowpack and gradual vegetation changes—affect the chemistry and flow of streams in temperate montane watersheds.

Stream Chemistry Response to Fire

Wildfires are increasingly affecting the wet forests of the Pacific Northwest, a trend expected to intensify with climate change. These fires disrupt water quality and streamflow, threatening aquatic ecosystems and drinking water supplies. While the impacts of high-severity wildfires on streams are relatively well-studied, less is known about low- and mixed-severity fires. To address this, researchers studied the mixed-severity 2020 Holiday Farm Fire in two watersheds within the H.J. Andrews Experimental Forest.

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