As Nigerians are enormously relationship oriented, they have the potential to work very collaboratively and successfully in a team environment. However, team members need to feel comfortable with each other and this can be difficult to achieve. Many factors are at play when Nigerians interact with each other. Tensions are never far from the surface. These tensions could be religious (Christian vs. Muslim), tribal or even language related.
Once a team has been formed and is seen to be working well together, it is probably best to leave it in place. Don't be tempted to break teams up unless there is a compelling reason to do so.
Team members will work best when managed by an authoritative leader who clearly defines each team member's roles and responsibilities and gives clear, consistent instructions.