Complex sentence: In 1972, the museum hired Dr. Dennis Power, an evolutionary biologist specializing in birds on islands, a native Californian who was at the time an Associate Curator at the Royal Ontario Museum in Toronto Ogelsby, ibid.
Split into simpler sentences: In 1972, the museum hired Dr. Dennis Power, an evolutionary biologist specializing in birds on islands. Power was a native Californian who at the time was an Associate Curator at the Royal Ontario Museum in Toronto Ogelsby, ibid.