the amount of energy that must be absorbed or lost to raise or lower the temperature of 1gram of liquid water by 1°c .

Although i don't know what is the simulated system, starfish are predators that eat mostly  microalgae,  snails, sponges, bivalves, mussels and other small marine animals. removing starfish from any system would definitely increase this animals that they prey.

Blindness is your answer

Answer empty nest syndrome;