LRES Seminar Series- Dr. Cory Cleveland
- Monday, November 4, 2019 at 1:10pm
- Leon Johnson Hall, 346 - view map
Nutrient Constraints on Future Productivity and Carbon Storage in Terrestrial Ecosystems
Dr. Cory Cleveland, Professor and Chair for the University of Montana's Department of Ecosystems & Conservation Sciences, will present during this week's LRES Seminar series.
Nutrients like nitrogen (N) and phosphorus (P) regulate plant productivity throughout the terrestrial biosphere and will continue to influence the patterns and magnitude of net primary production (NPP) by land plants in the future. For example, increasing atmospheric carbon dioxide concentrations are predicted to stimulate global NPP, but only if sufficient quantities of nutrients are available to fuel additional growth. New inputs of N and P enter ecosystems from the weathering of rocks, from atmospheric deposition, or through biological pathways like N fixation, but nutrients are also recycled in plants and microbes through soil and organic matter decomposition processes. Yet, the proportion of global NPP that can be attributed to new nutrient inputs versus recycled nutrients is unresolved, as are the large-scale patterns of variation across terrestrial ecosystems. In my talk, I will present results of some recent work using satellite data, biogeochemical modeling and empirical observations to identify previously unknown patterns of new versus recycled nutrient (N and P) productivity on land. In addition, I will explore how future rates of global NPP and carbon (C) storage may be constrained by nutrients, but also address how a number of processes in natural ecosystems may work to reduce predicted nutrient limitation on NPP and C storage.
- Department of Land Resources and Environmental Sciences