However this and the small number of other English specimens are thought to be of introductions, possibly accidental.

This helps prevent accidental introduction of the plant into non-native areas.

This process is expected to continue, as new organisms arrive through accidental or intentional introductions.

The most recent shift in the fish population followed the accidental introduction of common carp in 2001.

There is one record of an accidental introduction from Scotland.

It is believed to have been an accidental introduction from North America.

The accidental introduction of invasive species is also of concern.

The West Atlantic records are most likely the result of accidental introductions by humans.

To prevent any accidental introduction of species, access is highly regulated and restricted to scientific missions only.

Another method of accidental introduction occurs through the movement of machinery and equipment.