Whale ecology II

Acid rain and runoff decrease the pH in a lake system. What impacts does this have on the fish and fish species in that lake? What impacts would it have on other animals that rely on that lake?

According to the video, the presence of the wolves as a keystone species modified rivers. How would decreased erosion, more stability, and less turbidity impact both the number and species of fish in the rivers?

Whales also produce trophic cascades like starfish, otters, and wolves. Through their movements, feeding, and pooping (yes pooping!), they "stir" and fertilize parts of the ocean, allowing for larger amounts of plankton (microscopic sea plants) to grow. Why would having more plankton in areas be helpful to increase the amount of large, predatory fish (like sharks, salmon, and tuna) in those areas?

Beavers are "nature's engineers." By building their dams, they change how smaller tributaries flow and create small pools/ponds of water. What are some of the effects on the local ecosystem these dams and ponds can produce?

Describe what would potentially happen to this food web if foxes were removed.