Erica Bakker’s paper is now out in Freshwater Biology! Erica measured N fixation in cyanobacteria with and without midge symbionts and compared those rates to fixation rates in sediment heterotrophs. She found that the rates were comparable between all 3 groups despite assumptions that cyanobacteria are the dominant aquatic N fixers. Interestingly, she also found […]
Jarod Cable successfully completed his M.S. degree this summer, with a project on methane emissions from hydropower reservoirs. Congratulations, Jarod!
Shawnee Kasanke successfully completed her PhD Preliminary Exams this summer! As a fellow in the WSU-PNNL Distinguished Graduate Research Program, Shawnee will now begin her work at PNNL in Dr. Jim Moran‘s lab. At PNNL, she will help develop novel tools which she will use to understand the partnerships between different bacterial and fungal groups […]
Matt’s paper is out in SOIL! In this paper, Matt addresses the problem of C loss during dry-down in standard C mineralization assays. He found that wetter soils lose more C during dry-down but that a simple correction factor can account for that difference. Check it out!
We’re highlighted here for our recent funding from the Washington Water Resource Center. In cooperation with Benton Conservation District, Aaron will examine the effects of water stargrass removal on Yakima River oxygen concentrations.
We recently published a paper in Phytobiomes on how N cycling varies among different switchgrass cultivars (doi: 10.1094/PBIOMES-11-19-0064-FI). Switchgrass has various strategies for growing in low-nitrogen (N) environments, including translocating N to its roots during the winter and fostering a microbial community that can fix N. Switchgrass exhibits wide phenotypic and genotypic diversity, and we […]
Aaron Pelly and Erica Bakker successfully defended their MS theses last week, becoming the first two MS recipients from the lab! Aaron focused on the effects of water stargrass on ecosystem metabolism and dissolved oxygen concentrations in the Yakima River, and Erica measured nitrogen fixation in Cascades Mountains streams, examining both sediment bacteria and cyanobacteria. […]
Do you like rivers, microbes, plants, biogeochemistry, and/or agriculture? Are you looking for lab and/or field experience in environmental science or biology? Are you work-study eligible? If so, apply now for a work-study position in the Watershed Biogeochemistry Lab. I am looking for one work-study student to help with lab and field work during the […]
In our new paper, out in Soil Biology and Biochemistry, we used isotopic tracers in laboratory, greenhouse, and field settings to measure nitrogen (N) fixation in switchgrass. Our results suggest that bacteria associated with switchgrass fix N episodically – meaning fixation sometimes occurs at a high rate and is undetectable other times – perhaps in […]
Undergraduate researchers Rhenton and Cassandra presented at the WSU Tri-Cities Sympoisum today. Rhenton showed results from his summer project, in which he evaluated nutrient limitation of microbial and algal biofilms in tributaries of the Yakima River. Cassandra presented results on the effects of common herbicides, 2,4-D and glyphosate, on algal and microbial biofilms.