Use the energy pyramid to answer the following questions: 5. Explain why a bear can occupy multiple trophic levels and then provide an example.

Food webs are helpful diagrams to understand the relationships of organisms within a biological community. Answer the following questions using the food web below. Baleen whale Smaller toothed Sperm whale whales Penguins Elephant seal Leopard seal Other birds Fish Other seals Squid Krill Other herbivorous zooplankton Carnivorous zooplankton Phytoplankton Which of the following can be a secondary consumer? squid other seals krill herbivorous zooplankton fish other birds elephant seal

Answer clearly

Background A trophic level, or feeding level, is made up of all the organisms whose energy source is the same number of consumption steps from the sun in a given ecosystem. The trophic level of plants or producers is 1, while that of herbivores is 2 and that of animals that eat herbivores 3. Higher trophic levels can exist for animals even higher on the food chain. In this exercise, you will compute numerical values for human energy needs based on diets at different trophic levels. In this case study the owner of a farm raises soybeans and chickens. Grasshoppers feed on the farmers soybeans, and are in turn eaten by the chickens. Humans can, though rarely do, eat grasshoppers for sustenance. Humans can also eat soybeans. For the purpose of this exercise, make the following assumptions: A human requires 1 chicken/day  There are 365 days/year 1 chicken eats 25 grasshoppers/day 1 grasshopper requires about 30 g of soybeans/year 1,000 grasshoppers have a mass of 1 kg 1 human requires…

In a grassland ecosystem, a rabbit consumes 1000 kJ of plant material. Of this, 300 kJ is excreted as waste. How much energy is egested by the rabbit? Group of answer choices 1000 700 1300 300

What is the outcome for both species involved in a trophic interaction? +,

Create a 4 species food chain using arrows to show the direction of energy flow.

From your reading of the short article "Why Fish Need Trees and Trees Need Fish" by Anne Post, what is the amount of nutrients and energy that one adult chum salmon delivers to Alaskan streams? 20 grams of nitrogen 130 grams of phosphorus Over 20,000 kilojoules of energy 130 grams of nitrogen 20 grams of phosphorus Over 20,000 kilojoules of energy day 20 grams of nitrogen 80 grams of phosphorus Over 2,000 kilojoules of energy 80 grams of nitrogen 11 grams of phosphorus Over 20,000 kilojoules of energy

The following diagram illustrates a typical marine food web. Mercury, a toxic heavy metal, can  accumulate in the fatty tissue of organisms.    Which organism would you predict to have the highest level of mercury? Explain your answer.

Sequence energy flow through ecosystem