Simplify the following text for a Grade 10 native English-speaking person.
Original: The NicoleÃ os were evacuated in the early 19th century by the padres of the California mission system after a series of conflicts with Russian-led Aleutian fur trappers decimated their population .
Simplified: The NicoleÃ os were taken off the island in the early 19th century by the members of the California mission system after a series of conflicts hunters .