Field technician Lillian Evergreen measures the diameter of a burned and still live tree in the plot

burned and recovering hillside of WS1

burned and recovering hillside of WS1

burned and recovering hillside of WS1

burned and recovering hillside of WS1

Field technician Lauren Dorsch shows the data sheet used by the vegetation crew

Data sheet used by the vegetation crew

Field technician Lauren Dorsch shows the data sheet used by the vegetation crew

burned and recovering hillside of WS1

The vegetation field crew traverses the steep slope of Watershed 1

Tagged tree in area of WS1 burned by the Holiday Farm fire

Tagged tree in area of WS1 burned by the Holiday Farm fire

Data sheet used by the vegetation crew

Data sheet and plot marker in permanent vegetation plot of WS1

Field technician Jonathan Cowan in Watershed 1 after the Holiday Farm fire

The vegetation field crew on the steep, burned slope of Watershed 1

burned and recovering hillside of WS1

Streambed in WS1

Field technician Lauren Dorsch in Watershed 1

Field technician Lauren Dorsch in Watershed 1

Field crew in an unburned vegetation plot in WS1

Field crew remeasures vegetation in a permanent study plot

Field crew remeasures vegetation in a permanent study plot

Field crew remeasures vegetation in a permanent study plot

Field technician Lauren Dorsch measures tree diameter

Field technician Lauren Dorsch measures tree diameter

Field crew remeasures vegetation in a permanent study plot

Field technician Lillian Evergreen uses a caliper to measure stem diameter

Field technician Lillian Evergreen records data on vegetation

Field equipment

Field technician Lillian Evergreen records data on vegetation

Field technician Lauren Dorsch records data on vegetation

Field crew takes note of species type and vigor of plants in the study plots

Field crew takes note of species type and vigor of plants in the study plots

Field technician Lillian Evergreen records data on vegetation

Field equipment that measures temperature and air movement

Climbing rope, harnesses, lanyard, ascenders and carabiners are tools of the trade for a canopy ecologist whose field work is up in the trees

Instruments measure air temperature, air humidity, and air movement. The measurements on the ground are compared to measurements taken in the tree canopy.

A dendrometer band around a large Douglas-fir tree measures the daily and annual swell and contraction of the tree trunk.

A dendrometer band around a large Douglas-fir tree measures the daily and annual swell and contraction of the tree trunk.

Tree climbers use carabiners to climb and to attach their gear to their harnesses

Adam Sibley 56 meters above ground in the Discovery Tree. The white enclosure above his head contains the data logger that records and transmits data from sensors in the upper canopy.

Lookout Creek along the Discovery Trail

Mark Schulze, Andrews Forest Director, begins his ascent into the canopy to take measurements

Mark Schulze, Andrews Forest Director, takes a few minutes in the mid canopy as he makes his way high into the tree tops to make measurements

The blue and white discs in this image contain spore collectors for measuring the diversity of fungal spores which make it to this height in the canopy. This setup is replicated at six canopy heights.

The orange needles on this western hemlock branch are scorched, caused by a heat dome in summer 2021 that brought maximum air temperatures above 110 o F for three consecutive days.

The orange needles on this western hemlock branch are scorched, caused by a heat dome in summer 2021 that brought maximum air temperatures above 110 o F for three consecutive days.

Mark Schulze clips samples of branches high in the canopy as part of a study on needle scorch caused by the heat dome of summer 2021

Adam Sibley, graduate student, at ease high in the canopy. Adam spend many days and hours in the canopy for his research on assessing tree canopy microclimate and the response of trees to environmental stress

Looking down from high in the canopy into the crowns of neighboring trees

Looking down from high in the canopy into the crowns of neighboring trees

Looking down from high in the canopy into the crowns of neighboring trees

Looking down from high in the canopy into the crowns of neighboring trees

The cables and instruments along the tree trunk measure microclimate from the bottom of the tree to the top. Researchers measure temperature, humidity, leaf wetness and wind speed and direction. Suspended buckets measure fungal spore diversity.

Looking down from high in the canopy into the crowns of neighboring trees

Looking down from high in the canopy into the crowns of neighboring trees

Mark Schulze, Andrews Forest Director, takes a few minutes in the mid canopy as he makes his way high into the tree tops to make measurements

Mark Schulze climbing a neighbor of the Discovery Tree

The cables and instruments along the tree trunk measure microclimate from the bottom of the tree to the top. Researchers measure temperature, humidity, leaf wetness and wind speed and direction.

The cables and instruments along the tree trunk measure microclimate from the bottom of the tree to the top. Researchers measure temperature, humidity, leaf wetness and wind speed and direction.

The cables and instruments along the tree trunk measure microclimate from the bottom of the tree to the top. Researchers measure temperature, humidity, leaf wetness and wind speed and direction.

USFS Intern Araceli Morales-Santos at gage house of Watershed 9 (WS09) in the HJ Andrews Experimental Forest

USFS Intern Araceli Morales-Santos puts leaf guard on v-notch weir at WS09 stream gage

USFS Intern Araceli Morales-Santos puts leaf guard on v-notch weir at WS09 stream gage

USFS Intern Araceli Morales-Santos measures water stage at the v-notch weir at WS09 stream gage

USFS Intern Araceli Morales-Santos at the v-notch weir at WS09 stream gage

USFS Intern Araceli Morales-Santos measures water stage at the v-notch weir at WS09 stream gage

Stream channel of WS09 just above the stream gage, a year after the 2020 Holiday Farm Fire

USFS Intern Araceli Morales-Santos at the stilling well at WS09 stream gage

Ruler for manual checks of stage height in stilling well at a stream gage

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest

The sediment basin dam at WS09 was rebuilt after it burned in the 2020 Holiday Farm fire

USFS Intern Araceli Morales-Santos at WS09 gage house one year after 2020 fire in the HJ Andrews Experimental Forest

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through

Salt measured out for a tracer study in the stream in Watershed 01. The salt tracer is used to measure how long it takes for water to move down the stream bed

Oregon State University graduate student, Paige Becker, preparing a fluorescent tracer (also known as uranine) used to measure flow rates in streams.

A fluorescent tracer (uranine) used to measure flow rates in streams.

Oregon State University graduate student, Paige Becker, preparing a fluorescent tracer used to measure flow rates in streams.

Oregon State University graduate student, Paige Becker, using a meter to quantify concentrations of tracers in the stream

A sensor for measuring concentration of fluorescent tracers in stream water.

Oregon State University graduate student, Paige Becker, using a sensor to quantify concentrations of tracers in the stream

Oregon State University graduate student, Paige Becker, using a sensor to quantify concentrations of tracers in the stream

Oregon State University graduate student, Paige Becker, working in the stream in Watershed 01

A sensor for measuring water constituents in the stream.

Oregon State University graduate student, Paige Becker, near the stream in Watershed 01

Paige Becker with tubing used in her tracer experiments

Tubing and fluorescent tracer used in tracer studies of residence time of water in streams

Oregon State University graduate student, Paige Becker, preparing a salt tracer experiment in the stream in Watershed 01

Oregon State University graduate student, Paige Becker, conducting experiments in Watershed 01

Oregon State University graduate student, Paige Becker, conducting experiments in Watershed 01

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through

Oregon State University graduate student, Paige Becker, walks to her field study site in Watershed 01, a year after the 2020 Holiday Farm fire burned through

Vegetation Crew lead, Andy Bluhm (right) shows the digital data interface to RET Whitney Davis

Andy Bluhm (right) shows the plot map to RETs Whitney Davis (left) and James Stoe (right)

Andy Bluhm (left) and RET James Stoe (right) review the plot and stem map

RET James Stoe measures diameter of a tree

RET Whitney Davis assesses the health of a tree as part of the long-term vegetation study

RET James Stoe (left) and field technician Andy Bluhm (right) measure the diameter of a tree that is part of a long-term study

RET Whitney Davis measures the diameter of a tree

RET Whitney Davis measures the diameter of a tree

RET James Stoe reads of the tag number to a person nearby who is recording data

Tags and a measuring tape

RET Whitney Davis measures the diameter of a tree trunk growing along the ground

learning tree identification by needles

learning tree identification by needles

RET James Stoe measures diameter of a tree

Research Experience for Teachers (RET) Whitney Davis (top) and James Stoe (bottom) begin their ascent up a Douglas fir tree to take measurements in the canopy

Research Experience for Teachers (RET) Whitney Davis (top) and James Stoe (bottom) ascend a Douglas fir tree to take measurements in the canopy

RET Whitney Davis climbs to the top of the canopy to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

RET Whitney Davis climbs to the top of the canopy to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

RET Whitney Davis climbed a Douglas Fir tree to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

RET Whitney Davis climbed a Douglas Fir tree to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

Research Experience for Teachers (RET) Whitney Davis and James Stoe begin their ascent up a Douglas fir tree to take measurements in the canopy

RET James Stoe climbed a Douglas Fir tree to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

RET James Stoe climbed a Douglas Fir tree to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

RET James Stoe climbed a Douglas Fir tree to take measurements as part of her Research Experience for Teachers program at the Andrews Forest

A tablet displays the study plot with the stem map of all the tagged trees in Reference Stand 38, a site within a regional long-term study on vegetation

Field crew leader Andy Bluhm reviews the study plot map

Lookout Creek

Lookout Creek

Field technician Sean Marcum records data on tree size and tree health

Andy Bluhm locates a tagged tree, part of a long-term study on vegetation

Andy Bluhm measures the diameter of a pacific yew tree that has a trunk growing parallel to the ground

Field technician Sean Marcum records data on tree size and tree health as crew members measure and call out their data for recording

Moving through the research plots can be a challenge due to large logs and steep slopes

A tagged tree in the long-term vegetation permanent study plot study

Field technician Sean Marcum records data on tree size and tree health

Taking the diameter of a tagged tree, just above the nail. This tree is about 17cm diameter.

Recording the tag number and diameter of a tree in the long-term vegetation study

Researchers find and measure every tree in the study plot and mark each one off as they go. All tagged trees are tracked from year to year, over decades.

Sometimes a tag comes off a tree and needs to be replaced

Recording the tag number and diameter of a tree in the long-term vegetation study

Comparing leaves of western hemlock (left) and Pacific yew (right)

Comparing leaves of western hemlock (left) and Pacific yew (right)

Andy Bluhm measures the diameter of a large Douglas fir tree in the HJ Andrews Experimental Forest

Andy Bluhm measures the diameter of a large Douglas fir tree in the HJ Andrews Experimental Forest

Melissa Mauk, Keeley MacNeill, Allison Swartz, Dana Warren, Catalina Segura

Dana Warren takes a break from installing and inspecting tubing in the streambed

Keeley MacNeill and Allison Swartz measure temperature at the outflow of the tubes that were heating in the sun

Keeley MacNeill records water temperature

Allison Swartz measures stream temperature from coils of tubing for the warming experiment

Stream temperature and specific conductivity meter used to measure warming from coils of tubing for the warming experiment and travel time through the tubing

Allison Swartz measures stream temperature from coils of tubing for the warming experiment

Keeley MacNeill recording stream temperature data

At McRae Tributary East, Dana Warren and crew inspect a riparian area where trees were removed in 2017 to increase the amount of sunlight to the streambed

Inspecting filamentous algae on the stream bed that only grows in high light conditions