Hi! My name is Sebastiaan Koppelle. I am a postgraduate student in Limnology and Oceanography from the University of Amsterdam. My main research interest concerns the impact of climate change on the primary production, biogeochemical cycling and food web dynamics in the Arctic region. My first-time experience with the Arctic was in 2014 during my time as a master’s intern at the Royal Netherlands Institute for Sea Research (NIOZ). Here I was involved in a project studying the temporal variation in Arctic marine microbial interactions and the effects of glacial derived sediments on the grazing and viral lysis rates of natural phytoplankton communities in Kongsfjorden (Ny Ålesund, Svalbard). After completion of my first master’s project I continued working as a master’s intern at the Norwegian Institute for Water Research (NIVA) in Oslo, Norway. Here I was involved in a project in which we investigated the impact of the Målselv river discharge on the coastal water chemistry and lower food web structure in Målselvfjorden (Troms, Norway). The fieldwork and research expeditions I have participated in during these projects left a strong impression and made me decide to continue my future scientific career with a focus on polar microbial ecology. Thus, I returned to the Arctic in August 2015 and May 2016 to participate in the courses ‘The Ecology of Arctic Marine Benthos’ and ‘Light Climate and Primary Productivity in the Arctic’ at the University Centre in Svalbard (UNIS). During these courses, I joined a research expedition around the Svalbard archipelago and participated in several field excursions on the West coast of Svalbard. At this moment, I am looking for a new challenge in which I can combine my main research interests and apply the knowledge I have gained during my education!