2016 Distinguished Alumni Seminar: Professor Randy Dahlgren

On Wednesday, October 5, we are very pleased to welcome Professor Randy Dahlgren (’84, M.S.; ’87, Ph.D.) from the University of California – Davis to give our annual Distinguished Alumni Seminar: “From Subduction to Salmon: Geologic Subsidies Drive High Productivity of a Volcanic Spring-Fed River.” The talk is open to the public and will run from 3:30 to 4:20 p.m. in Anderson 223.

randy-dahlgrenAbout the Speaker
Randy is a Distinguished Professor of Soil Science and Biogeochemistry in the Department of Land, Air and Water Resources at the University of California – Davis, where he holds the Russell L. Rustici Endowed Chair in Rangeland Watershed Sciences. Randy received his Ph.D. and M.S. in forest soils from SEFS (then the College of Forest Resources), and his B.S. in soil science from North Dakota State University. His research program in biogeochemistry examines the interaction of hydrological, geochemical and biological processes in regulating nutrient cycling in terrestrial ecosystems and surface and ground water chemistry. He is a fellow of the Soil Science Society of America, fellow of the UC Davis Agricultural Sustainability Institute, and has received several awards, including the UCD 2008 Academic Senate Distinguished Teaching Award, 2012 UC Davis Prize for Undergraduate Teaching and Scholarly Achievement (considered the UC-Davis Nobel Prize), and the West Lake Friendship Award from the Governor of Zhejiang Province, China.

About the Talk
Critical habitats necessary to support cold-water species in lotic ecosystems are anticipated to diminish as global climate change reduces summertime availability of cold water in streams. Volcanic spring-fed streams may prove an exception to this habitat loss as large aquifers with high residence times produce reliable stream flow for sustaining cold-water species. Here, we identify a hitherto overlooked exceptionally productive and resilient environment in which large groundwater springs located within volcanic arcs provide consistent cold-water stream flow and ecologically significant nitrogen and phosphorus inputs from geologic sources. In the spring-fed Shasta River of northern California, steelhead trout take advantage of abundant food and stable year-round flow and water temperature regimes to accrue a substantial growth advantage over individuals from an adjacent non-spring-fed stream, exhibiting a six-fold increase in mass and two-fold increase in length. Results demonstrate that geologically derived nutrients in spring-fed streams are driving aquatic ecosystem productivity and resiliency, making these habitats exceptionally important for conserving cold-water species impacted by global climate change.

We are thrilled to welcome Randy for the Distinguished Alumni Seminar, and we hope you’ll be able to join us!

SEFS Seminar Series: Fall 2016 Schedule!

The schedule is set for the Fall 2016 SEFS Seminar Series, and this quarter’s talks are loosely organized around a spatial theme, “Ecosystems, Ecology and Management at Scales.” We’re excited to welcome a wide range of speakers, from new faculty hire Brian Harvey, to a research fellow from Tasmania, to Professor Randy Dahlgren, who will be visiting from UC Davis to give the Distinguished Alumni Seminar.

Held on Wednesdays from 3:30 to 4:20 p.m. in Anderson 223, the talks are always open to the public, and the first seminar of each month will be followed by a casual reception down the hall in the Forest Club Room (or the Salmon BBQ, in the case of the October 5 seminar!). Students can register for course credit under SEFS 529A.

Check out the schedule below and join us for as many talks as you can!

2016_09_fall-2016-posterWeek 1: September 28
“Carbon cycling in the global forest system”
Dr. Tom Crowther
Postdoctoral Research Associate
Yale School of Forestry and Environmental Studies

Week 2: October 5*
“From subduction to salmon: Geologic subsidies drive high productivity of a volcanic spring-fed river”
Professor Randy Dahlgren
UC Davis

Week 3: October 12
“Putting PNW retention forestry practices into a global context”
Dr. Sue Baker
Research Fellow
University of Tasmania & Forestry Tasmania

Week 4: October 19
“A comparison of low-intensity management options for Douglas-fir dominated forests in western WA”
Professor Greg Ettl

Week 5: October 26
“Bring on the heat: How climate change may protect eastern hemlock”
Dr. Angela Mech
Postdoctoral Research Associate

Week 6: November 2*
“Avoided impacts on human health by recovering wood residues for bioenergy and bioproducts in the Pacific Northwest”
Professor Indroneil Ganguly

Week 7: November 9
“Unlikely hero, or the next to fall? Causes and consequences of subalpine fir mortality in the wake of recent bark beetle outbreaks”
Dr. Brian Harvey
Smith Fellow (and future SEFS faculty member!)

Week 8: November 16
“California spotted owl habitat: New insights from a multiscale analysis from LiDAR data”
Professor Van Kane

Week 9: November 30
“Changing fire regimes in eastern Washington: Recent large wildfire events and implications for dry forest management”
Dr. Susan Prichard
SEFS Research Scientist

Week 10: December 7*

“Exploring frequent fire forests at multiple scales”
Dr. Keala Hagmann
Postdoctoral Research Associate

* Indicates reception after seminar

Annual Salmon BBQ: October 5!

For countless students around the country, the end of summer can trigger the cold Pavlovian sweats of a new school year. Around here, though, you’re far more likely to get the meat sweats this time of year thanks to our Annual Salmon BBQ, coming up on Wednesday, October 5, from 4:30 to 6:30 p.m. in the Anderson Hall courtyard!

2016_08_Salmon BBQIn case you haven’t been to the Salmon BBQ before, we have this autumn feast down to a beautiful, mouth-watering science. Once again, SEFS alumnus Steve Rigdon (’02, B.S.) will be providing the salmon, caught using traditional Yakama fishing techniques. Luke Rogers (’99, B.S.; ’05, M.S.) will continue his long-running role of overseeing the grilling operation using fir and alder wood from Pack Forest, which forester Jeff Kelly will hew and haul up beforehand. Professor Emeritus Steve West will set up a few kegs from Big Time Brewery, and Professor Emeritus Bruce Lippke will have an assortment of wines on hand for you to sample. In addition to the salmon, we’ll be providing ample corn on the cob, chips and salad, but the rest of the meal is a potluck, so please bring a side dish, snack or dessert item to share!

All alumni, students, staff and faculty are invited, and we heartily encourage you to bring friends and family. The event is free—and awesome—and no RSVP is required, and we will have plenty of salmon for all.

Also, if you’re able to assist with set-up or clean-up, please contact Karl Wirsing to make sure we have enough help before and after the event. We’ll start getting ready around 3 p.m., and we’ll need even more hands to help clean up afterward from 6:30 to 7 (ish). If you can spare a few minutes at either end, that would be tremendously appreciated!

That’s Not All!
Come a little early to the Salmon BBQ and catch the Distinguished Alumni Seminar, which will feature Randy Dahlgren (’84, M.S.; ’87, Ph.D.), a professor of soil science and biogeochemistry in the Department of Land, Air and Water Resources at the University of California – Davis. His talk, “From Subduction to Salmon: Geologic Subsidies Drive High Productivity of a Volcanic Spring-Fed River,” will run from 3:30 to 4:20 p.m. in Anderson 223 as part of the SEFS Seminar Series—ending just in time for the start of the festivities downstairs in the courtyard.

We invite you to take some time, as well, to browse through a wonderful photography exhibition in the Forest Club Room, where photographer John Tylczak has once again generously loaned 10 images from his collection, Views from the Northwoods: 1983-1995. These large, black-and-white photos capture the Washington timber industry in the 1980s and early ’90s, and this year his prints will focus on shots from area timber mills—including the beautiful image below. They will be on display throughout the month of October, so even if you can’t make the Salmon BBQ we encourage you to swing by Anderson Hall another time to enjoy these photographs.

It’s going to be a great kick-off for the fall quarter, and we sure hope to see you there!

Photo © John Tylczak.

Harold Posthmus, owner of the last shake mill in Whatcom County. C&H Cedar, Deming, Whatcom County; August 5, 1986.
Harold Posthmus, owner of the last shake mill in Whatcom County. C&H Cedar, Deming, Whatcom County; August 5, 1986.