Ariver has different populations of lampreys and paddlefish. the paddlefish feed on zooplankton, while the lampreys feed on the paddlefish. humans living around the river hunt the paddlefish. what will happen to the ecosystem if the paddlefish are hunted in excess?

The answer is: The population of paddlefish will decrease, while the population of zooplankton will increase.

The paddlerfish is predator to zooplankton. An decrease in predator (in this example the paddlerfish) will increase the number and genetic variation in a population of zooplankton.

An decrease of food (in this example the paddlerfish) will decrease population of the lampreys.

Hman activity (hunting) decrease population of the paddlerfish.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.