Mountains combine spatially compressed environmental gradients with highly heterogeneous topography, providing a natural template to explore drivers of variation in lake responses to climate at multiple spatial scales…

Nutrient pollution from agricultural fertilizers contributes to toxic algal blooms and oxygen dead zones in many of the world’s rivers, lakes, and coastal areas, but in intensively fertilized regions, variation in nutrient loading among years is now driven by climate. Understanding climactic controls on river nutrient export is therefore crucial for predicting and mitigating these environmental problems…

Freshwater systems and the ecosystem services they provide to humans are fundamentally connected to what happens within their watersheds. In my dissertation I focused on understanding how broad scale watershed features influence the movement of materials and energy between aquatic and terrestrial environments...

Temperature controls the metabolic rates of organisms across all levels of food webs, from microbes to fish, and therefore influences many ecosystem processes. In high latitude regions such as Alaska, cold temperatures constrain feeding and growth rates of aquatic consumers, limiting their ability to capitalize on abundant but ephemeral food resources...