Gradient Studies


Phenocam map


Previous work includes ecophysiological studies along gradients of resource availability (e.g., canopy light gradient, from sun to shade) and stress (e.g., as related to elevation and latitude, to the limits of growth). We are particularly interested in responses of leaf structure and function in relation to growth environment, and use measurements of photosynthesis and respiration, leaf reflectance, and chlorophyll fluorescence, as well as anatomical and morphological studies, to quantify these responses.


Previous work in this regard has been conducted throughout the mountains of New England, at treeline in Alaska’s Brooks Range, and in the Long Range Mountains of Newfoundland. Leveraging a whole-watershed calcium fertilization experiment at the Hubbard Brook LTER, we have also studied the health of sugar maple seedlings growing on soils differing in base cation availability.