Alternatively , when more of the starfish are present , fewer grazers cause less damage and the kelp flourishes unchecked .
If fewer L. magellanica are recruited because of temperature and other factors , more grazers such as Tetrapygus niger survive , and barren areas occur .
When more of the starfish are present , fewer grazers cause less damage and the kelp flourishes unchecked .
If fewer L. magellanica are recruited because of temperature and other factors , more grazers such as Tetrapygus niger survive , and barren areas occur .