Summer Seminar Series - UROPS - Rivers as conduits for sediment and DNA
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Rivers are the veins of a continent. They transport sediment, nutrients, and even organisms from their headwaters in mountains down to their outlets at the ocean. Along the way they carve out their own topography, shaping the landscapes that we all live within. In the Perron lab we study all aspects of rivers, from the patterns they form at a continental scale all the way down to how a sand grain bounces along a river bed. Today we will discuss two aspects of rivers. First, we will discuss how rivers have shaped the evolution of fish in the Appalachian Mountains. Steep sections of the rivers prevent the fish from swimming upstream, causing populations to grow genetically distant. Next, we will discuss how sediment moves along river beds which has implications for the long-term topographic evolution of landscapes.