(Finnish proverb).
Forests affect their environment in multiple ways, but their functions also depend on the changes in climate and environment. We study the processes and responses of boreal forest ecosystems on different levels, from the scale of tree parts and soil particles to the scale of landscape. We seek to understand how the environment affects the functioning of a single plant or whole forest, and how, inversely, the forests can influence their surroundings. These questions are important when trying to understand and predict the impacts of warming climate on the environment and evaluating the importance of forested areas in mitigating climate change.