Final answer:
The Kemijoki and Oulujoki rivers are both located in Finland, contributing to its ecological and economic landscape and subject to ecological research by Finnish universities.
Step-by-step explanation:
The Kemijoki and Oulujoki rivers are found in Finland. Within Finnish territory, these rivers are significant for various ecological and economical aspects. The Kemijoki is the longest river in Finland, while the Oulujoki is known for its chain of hydroelectric plants. Both rivers have an impact on local ecosystems, including the lifecycles of species such as the river and noble crayfish (Joki- ja täpläravun) and the deer ked, which is distinctive to the eastern Fennoscandia range that includes Finland.
Academic research from universities, such as the University of Oulu and the University of Eastern Finland, has contributed greatly to the understanding of the ecology and biology of areas surrounding these rivers. Researchers like Ane Timenes Laugen and Arja Kaitala focus on the ecological dynamics within Finland, which are essential for environmental sciences and research.