Faculty Profiles

Scharnagle, K., Johnson, D. R., & Ebert-May, D. (2019). Shrub expansion and alpine plant community change: 40-year record from Niwot Ridge, Colorado. Plant Ecology and Diversity, 12, 407–416. https://doi.org/10.1080/17550874.2019.1641757

Gough, L., & Johnson, D. R. (2018). Mammalian herbivory exacerbates plant community responses to long-term increased soil nutrients in two Alaskan tundra plant communities. Arctic Science, 4, 153–166. https://doi.org/10.1139/AS-2017-0025

Lara, M. J., Johnson, D. R., Andresen, C., Hollister, R., & Tweedie, C. (2017). Peak season carbon exchange shifts from a sink to a source following 50+ years of herbivore exclusion in an Arctic tundra ecosystem. Journal of Ecology, 105, 122–131. https://doi.org/10.1111/1365-2745.12654

Johnson, D. R. (2016). Annual Report: Determining patters of plant succession, ecosystem services and hydrology at Wild Basin Wilderness Preserve.

Johnson, D. R. (2015). Annual Report: Determining interannual variability in vegetation structure and exploring leaf decomposition and fungal metabolism at Wild Basin Wilderness Preserve.

Johnson, D. R. (2014). Annual Report: Determining interannual variability in vegetation structure and the relationship between structure and ecosystem function at Wild Basin Wilderness Preserve.

Johnson, D. R. (2013). Annual Report: Vegetation survey at Wild Basin Wilderness Preserve and Adjacent BCP Vireo Preserve.

Johnson, D. R., & Gough, L. (2013). Two arctic tundra graminoids differ in tolerance to herbivory when grown with added soil nutrients. Botany, 91, 82–90. https://doi.org/10.1139/cjb-2012-0143

Lin, D. H., Johnson, D. R., Andresen, C., & Tweedie, C. (2012). High spatial resolution decade-time scale land cover change at multiple locations in the Beringian Arctic (1948 – 2000s). Environmental Research Letters, 7, 025502+14. https://doi.org/10.1088/1748-9326/7/2/025502

Gough, L., Moore, J. C., Shaver, G. R., Simpson, R., & Johnson, D. R. (2012). Above- and belowground responses of arctic tundra ecosystems to altered soil nutrients and mammalian herbivory. Ecology, 93, 1683–1694. https://doi.org/10.1890/11-1631.1

Elmendorf, S., Henry, G., Hollister, R., Björk, R. G., Boulanger-Lapointe, N., Cooper, E. J., … Wipf, S. (2012). Plot-scale evidence of tundra vegetation change and links to recent summer warming. Nature Climate Change, 2, 453–457. https://doi.org/10.1038/nclimate1465

Villarreal, S., Hollister, R., Johnson, D. R., Lara, M. R., Webber, P., & Tweedie, C. (2012). Tundra vegetation change near Barrow, Alaska (1972-2010). Environmental Research Letters, 7, 015508+10. https://doi.org/10.1088/1748-9326/7/1/015508

Lara, M., Villarreal, S., Johnson, D. R., Hollister, R., Webber, P., & Tweedie, C. (2012). Estimated change in tundra ecosystem function near Barrow, Alaska between 1972 and 2010. Environmental Research Letters, 7, 015507+10. https://doi.org/10.1088/1748-9326/7/1/015507

Tweedie, C., Johnson, D. R., Lara, M., & Villarreal, S. (2011). IPY-Back to the Future (BTF): Re-sampling research sites established more than 25 years ago to assess future trajectories of change in high latitude terrestrial ecosystem structure and function.

Johnson, D. R., Lara, M., Shaver, G., Batzli, G. O., Shaw, J., & Tweedie, C. (2011). Exclusion of brown lemmings reduces vascular plant cover and biomass in Arctic coastal tundra: resampling of a 50+ year exclosure experiment near Barrow, Alaska. Environmental Research Letters, 6, 045507+8. https://doi.org/10.1088/1748-9326/6/4/045507

Johnson, D. R., Ebert-May, D., Webber, P., & Tweedie, C. (2011). Forecasting alpine vegetation change using repeat sampling and a novel modeling approach. Ambio, 40, 693–704. https://doi.org/10.1007/s13280-011-0175-z

Callaghan, T. V., Tweedie, C., Åkerman, J., Andrews, C., Bergstedt, J., Butler, M., … Zemtsov, V. (2011). Multi-decadal changes in tundra environments and ecosystems: synthesis of the international Polar Year – Back to the Future Project (IPY-BTF). Ambio, 40, 705–716. https://doi.org/10.1007/s13280-011-0179-8

Tweedie, C., Johnson, D. R., Lara, M., & Villarreal, S. (2010). IPY Back to the Future (BTF): Resampling research sites established more than 25 years ago to assess future trajectories of change in high latitude terrestrial ecosystem structure and function.

Tweedie, C., Johnson, D. R., Lara, M., & Villarreal, S. (2009). IPY Back to the Future (BTF): Resampling research sites established more than 25 years ago to assess future trajectories of change in high latitude terrestrial ecosystem structure and function.

Gough, L., Shrestha, K., Moon, B., & Johnson, D. R. (2008). Long-term mammalian herbivory and nutrient addition alter lichen community structure in Alaskan dry heath tundra. Arctic, Antarctic and Alpine Research, 40, 65–73.

Gough, L., Ramsey, E., & Johnson, D. R. (2007). Plant-herbivore interactions in Alaskan arctic tundra change with soil nutrient availability. Oikos, 116, 407–418. https://doi.org/10.1111/j.0030-1299.2007.15449.x