from the sun or hydrothermal vent to a top predator. Every meals chain finish with a prime predator, and animal with no natural enemies (like an alligator, hawk, or polar bear). These are called autotrophs or major producers. All meals chains in a neighborhood which are linked to one one other. The feeding order of Jack skellington and zero if I’m drunk it’s her fault shirt organisms in an ecosystem – straight line from bottom to top. Ecosystem, Food Chain, and Food Net Vocabulary.