translate English to French: In 1993, Lake Ontario water levels were exceptionally high and submerged much of the vegetation that the Black Terns would normally nest on, so a number of artificial nest platforms were set out.
En 1993, le niveau d'eau particulièrement élevé du lac Ontario a submergé une bonne partie des plantes sur lesquelles les sternes noires ont l'habitude de nicher. On a donc installé un certain nombre de nichoirs artificiels.