We studied the impact of climate change on nematodes in a palsa peatland in Norway. This ecosystem, crucial for carbon storage, is rapidly changing due to warming and permafrost thaw. We found that intact palsas host more nematode populations, but warming reduces their numbers, particularly bacterivores and omni-carnivores. Additionally, fungivores became more dominant over the summer. These changes may alter nutrient cycles, highlighting the need to study nematodes in fragile Arctic ecosystems.