Small populations in more southern areas disappeared due to water contamination.

If there are no resistance genes, the population may disappear.

Fire also results in populations disappearing, returning after a period of two years.

That population disappeared in 1953 due to the collapse of the cave.

This plant was considered extinct for over 50 years because its historical populations had disappeared.

With our eyes wide open we saw how the whole population of an average-sized village disappeared within a second.

In some areas the native population nearly or completely disappeared.

How did such a huge population of millions of people disappear?

This population disappeared in the latter half of the 20th century.

He made multiple returns, but after a few years the population disappeared.