Bannister 110

Interpreting tree ring records using a plant ecophysiological approach

Trees' rings record a wealth of information on climate, disturbance, and forest dynamics, and can record these processes from the plot to regional to global scales. However, extracting plant physiological processes from the tree ring record has proved to be more difficult, as integration of leaf to whole tree processes can often lead to confounding results. My research aims to bring a plant ecophysiological perspective to interpreting the tree ring isotopic record and to ask, what processes are the rings actually recording?

Vegetation responses to long term environmental changes at a savanna-forest boundary

Ongoing anthropogenic changes, such as land-use change, climate changes, and rising CO₂, can alter vegetation distribution and function. Ecotones and biome boundaries, such as at the boundary between savannas and closed forests, may be the most vulnerable to these environmental changes. Here, I use both historical survey data and tree ring records to explore the impacts of ~150 years of past environmental changes on the savanna-forest boundary region of the Midwest US.

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