Join EarthEcho International for a STEM-tastic conversation about watershed biogeochemistry with Diana Oviedo Vargas, Watershed Biogeochemist at Stroud Water Research Center in Avondale, PA. Diana's research seeks to improve our knowledge about the elemental cycles in streams, rivers, and estuaries and how they are linked to each other, to the water cycle, and to the terrestrial ecosystem at the surface and the subsurface level. Her expertise includes aquatic ecosystems in temperate and tropical zones and along the full river continuum, from headwaters, to large rivers, to estuaries and the coastal ocean.