Towards Intra-Seasonal Estimation Of Forest Net Primary Productivity: Evaluating Automated Dendrometers For High-Temporal Resolution Woody Growth Signals Thesis uri icon

Overview

abstract

  • Thesis (M.S., Natural Resources) -- University of Idaho, 2016 | In the face of increased drought intensities associated with global climate change, improved understanding of forest carbon cycle responses requires novel monitoring techniques that evaluate forest processes at intra-seasonal resolutions. This study employed automated dendrometers in a northern Rocky Mountain ecosystem in order to estimate forest woody Net Primary Productivity (NPP), a carbon flux which has not previously been measured in step with ecosystem model outputs or other readily measured carbon fluxes. Site-specific patterns of multi-scale stem circumference variation in the context of summer drought stress were first characterized in order to develop a protocol for NPP estimation in dry environments. Subsequent NPP profiles were offset to later in the summer than volume growth profiles due to continual density increases and revealed species-specific timing in relation to mid-summer drought. Study findings highlighted a methodological path towards widespread implementation of more comprehensive carbon flux accounting that includes NPP estimation.

publication date

  • June 1, 2016

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