According to the graph, what is causing the deer population to decrease

Examine the graph below of two animal populations. Which animal must be the prey species?

Predator population lags behind prey population because......

in 1995 Wolves were reintroduced to Yellowstone National Park. Which answer below most accurately describes a possible trophic cascade the could result from the reintroduction of wolves?

In an energy pyramid, how much of the energy in each level gets passed to the next level above it?

An organism that obtains energy by eating other organisms.

Which of the animals in this food web is an omnivore? (choose 2)

If producers in this food web have 2,000kCal of energy, how much of that would end up going to the herring (secondary consumers)?

Animals that only eat producers (also known as herbivores)

What is this called?

Which of the following is not a biotic factor in an ecosystem?

In this ecosystem model, what is missing?

What is a keystone species?

Which ecological problem was NOT caused by elk?

What is a tropic cascade?

Two arctic fox are fighting with a polar bear for a sea lion carcass. One fox distracts the bear while the other eats. What type of limiting factor is the polar bear?

A group of elephants gets stuck in mud at the edge of the river from a recent mud slide. A lion waits for an elephant to get tired before it attacks. What is the limiting factor to the elephant population?

A duck population is breeding at exponential rates. The snakes that hunted them have been collected by fur collectors. They make boots from python snake skin. What is the limiting factor to the snakes?

A duck population normally begin migrating south right after the last rain of the late summer season. Suddenly, they’re migrating much earlier. The climate has been changing far too often which is altering the effects of their magnetite. What's the limiting factor?

One of the wolf populations leaves the forest. Over time, bushes, trees and moisture begin to leave as well. There is an effect on the producer populations because the herbivores are overgrazing the land. What is the limiting factor to the producer?

One of the wolf populations begins to compete with a new bear population for the same herbivores. Over time, bushes, trees and rivers improve in numbers. There is an effect on the producer populations. What is the limiting factor to the herbivore?

Small krill sweep the river bottom rocks for debris and muck. Next, the krill is suddenly swooped up by a small fish. The small fish then gets eaten by a salmon. A week after the bear eats the salmon, it begins to have symptoms. Over time the bear weakens from a botfly infection. What is the limiting factor to all the consumers?

A honey-badger digs the ground tunnels in search for snakes. In one occasion, the badger finds a snake and competes with it. The badger leaves scratches and bite marks on the snake before it escapes. After twenty-four hours the snake dies. What is the limiting factor to the snake?

The wolf population gets reintroduced to the ecosystem. There is enough deer to go around, so they eat comfortably. The wolf population begins to grow out of control with so much food. The different wolf families then begin to compete for the few caves that exist. Not everyone has good shelter so some have to sleep in the forest floors. What is the limiting factor to the wolves?

The wolf goes extinct, and the deer population has no predator to worry about. They graze the land. Because there is no more food. Some of the deer begin to bite at each other, while others die of starvation. What is the limiting factor to the deep population?

A landslide covers the river’s path. Further downstream, water depletes and fish populations start to go down. In this case the landslide was which kind of limiting factor?

A random cloud forms and fills the rivers with excess water. In one lake biome, the excess rain pulls trees into rivers destroying bird shelters. What is the limiting factor to the biome?

A random cloud forms and fills the rivers with excess water. In one lake biome, the excess rain pulls trees into rivers destroying bird shelters. What is the limiting factor to the biome?

A random cloud forms and fills the rivers with excess water. In one lake biome, the excess rain pulls trees into rivers destroying bird shelters. What is the limiting factor to the biome?