New paper synthesizing stream metabolism from our SCALER project shows that potential increase in CO2 emission from streams is related to temperature and metabolic balance. doi:10.1038/s41561-018-0125-5
Mutschlecner et al. find that humic, recalcitrant dissolved organic matter dominates the DOM pool throughout the year, but is more labile during snowmelt. Echoing their prior field study, biolability of DOM was limited by phosphorus.
We are hiring a technician to perform analytical chemistry, maintain instream sensors, and carry out field work in streams and watersheds. Apply by December 6, 2017 to job 18-14 at http://bit.ly/2AYjWdp. UA is an AA/EO employer and educational institution and prohibits illegal discrimination against any individual: www.alaska.edu/nondiscrimination.
Recruiting a post-doc to join the lab March 2018 working on a project focused on resilience of boreal catchments to changes in the fire and permafrost regimes. The researcher would join a team using instream sensors to characterize carbon and nitrogen cycles of boreal catchments and evaluate temporal patterns as potential indicators of ecosystem stability and impending regime change. To apply, contact Dr. Harms (email@example.com) by Jan 15 with a CV and cover letter describing research interests and experience.
A Ph.D. assistantship is available to study nutrient dynamics of watersheds and freshwater ecosystems in the boreal forest. Research would focus on interior Alaska, in collaboration with the Bonanza Creek Long-Term Ecological Research program. Potential research topics include hydrologic or gaseous nitrogen export from ecosystems subject to permafrost loss or disturbance. Prospective students should contact Dr. Harms (firstname.lastname@example.org) and include a brief description of research interests, experience, and academic preparation. The application deadline for the graduate program in the Department of Biology & Wildlife (http://www.bw.uaf.edu/graduates/index.php) is Jan 15 2018. An M.S. or significant ecology-related work experience following a bachelor’s degree is required. Applicants should have strong academic backgrounds in natural science, prior research experience, and demonstrated interests in ecosystem ecology or biogeochemistry.
Audrey Mutschlecner's study demonstrating a positive effect of P on DOC retention in streams of CPCRW is now out in Ecosystems. Experiments used leachates of leaves collected from Roger Ruess' long-term N and P fertilization plots at the BNZ LTER. doi:10.1007/s10021-017-0177-1