Complex sentence: With a healthy macaw population, such events could be beneficial by creating nest cavities, but not if the species was scattered in fragmented habitat, which also forced them to seek food in areas where they would be more vulnerable to hunting.
Split into simpler sentences: With a healthy macaw population, such events could have been beneficial by creating nest cavities. However, given the species' precarious position, it may have resulted in fragmented habitat and caused them to seek food in areas where they were more vulnerable to hunting.