Who is who

Sarah Schwieger


Sarah is a plant ecologist with a strong focus on belowground ecology. she is studying the effects of climate change on the decomposition on a regional (arctic) to global scale. In a future warmer environment, it is thought that microbes become more active and break up biomass quicker and more carbon is released into the atmosphere in form of CO2 and methane. However, climate change is a bit more complex than that, and the problem is that we don’t have a clear idea of how all the different factors that are changing with climate warming will interact and affect the different stages of decomposition.

The Arctic tundra stores large amounts of carbon in its soils, twice as much as is present in the atmosphere. The Arctic region is warming three times as fast as the rest of the planet. Releasing the stored carbon in the form of CO2 and methane adds to global warming and affects not only people in the Arctic, but around the world. My work aims to understand how decomposition is affected by the many factors that change with climate warming, such as temperature, precipitation, and plant species composition.

The Tea Bag Index (TBI) can help us shedding light on these important questions. Across the world, standardized methods are used in climate change experiments, such as ITEX open-top chambers (OTC’s). Sarah will perform a synthesis of TBI data from OTC’s, which allows us to easily collect data on different decomposition stages and perform large-scale comparisons over global scales.