Uptake dynamics of inorganic and organic nitrogen in forest plants

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Lack of available nitrogen (N) limits plant growth in most Canadian forests. Many woody plants are well adapted to tolerate low-N soils having slow growth rates, long-lived tissues, low nutrient concentrations and low rates of nutrient loss. In addition, most woody plant roots are associated with mycorrhizal fungi which assist in nutrient acquisition. Many forest plants can take up N in organic and inorganic forms which raises the possibility of niche partitioning where species are adapted to take up and use particular N forms. My lab seeks to understand the physiological mechanisms of adaptation and acclimation to N form and availability. With this information we can evaluate root competitive strength and response in forest plants which, in turn, influence species diversity, primary productivity and community stability.