Abstract - Extreme weather events are becoming more prevalent with increasing global temperatures. In the Northeastern U.S., spring frost events are destroying forest ecosystems by defoliating newly budded trees. In order to grasp a better understanding of community dynamics and carbon fluxes, it is imperative to understand more about species-specific phenological and physiological responses to these events. This study aimed to investigate the legacy effects of a spring frost event in Black Rock Forest on the specific photosynthetic and intrinsic water use efficiency responses within unaffected red maples and sugar maples alongside defoliated red oaks. A LI-6800 machine conducted gas exchange measurements in the north, south, valley, and headquarter sites for each species. The new flush of red oak leaves portrayed the greatest amount of photosynthetic productivity and efficiency while red maples and sugar maples retained their original characteristics with inThe Legacy Effects of a Defoliating Spring Frost Event on SpeciesSpecific Leaf Level Photosynthesis Prableen Kaur creased sensitivities. Hence, the defoliated tree species had a competitive advantage with shifted phenological patterns. Future research can be conducted several growing seasons after the frost event to determine the extent to which these events impact species dynamics, including DBH tree growth. New predicative carbon models can also be formed to create new management for tree implantation’s that maximize sequestration rates.

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