We have a few new 2019 publications to report.
The first publication is the outcome a collaboration with Bob Booth and Ryan Peters from Lehigh University. For his undergraduate honors thesis Ryan was interested in determining how light intensity influences the composition of testate amoeba communities in peatlands, as well as use of mixotrophy by some of those species. To address the mixotrophy question he used carbon isotopes, which indicated the extent of carbon they gained from autotrophy vs. heterotrophy. The carbon isotope values of the mixotrophs suggested that they did use autotrophy to some extent. However, there was no effect of the shading treatment on carbon isotope values, suggesting the mixotrophs gained similar amounts of C from autotrophy and heterotrophy despite reduced light intensity (which we had hypothesized would cause them to use more heterotrophy). We plan to follow up on several of the new questions that this study has raised..
The second publication was led by a formed postdoc in the lab, Bill Landesman, and Zac Freedman at WVU. This study investigated factors driving temporal variation in the composition of soil bacterial communities. Kudos to Lydia and Abby for assistance with the field work!
Lastly, we contributed nitrate isotope data to a large-scale synthesis effort led by Stephen Sebestyen that reports on the amounts and drivers of unprocessed atmospheric nitrate in streams in forests of eastern North America. Watch for future work by Joel that follows up on the results of this study.