A large scale collection of leaves, specifically that of common dwarf birch (Betula nana L.), would allow us to measure the element transfer from permafrost to Arctic ecosystems. The leaves that you will collect during your walk will be sent to our laboratory in Paris, France, to assess the different mineral element concentrations (for example, copper, nickel, selenium, and lead). We will localize this measurement and generate a map of element concentrations. As Betula nana can be found in many Arctic locations, we will be able to compare the distribution of elements and track the effect of climate change on ecosystem health.