Observations of an Ecosystem

An ecologist made the following observations of an ecosystem. The water is contaminated with PCBs from an industrial spill. PCBs have been found to biomagnify in a food chain. Which organism(s) IN THE DATA TABLE BELOW would have the highest concentration of PCBs in their tissues? Which would have the least?

Calculate the approximate amount of water used to produce a meal consisting of pork with rice (100 g), 1 glass of apple juice, and a pear.

What are some ways an individual could reduce his or her water footprint? Use data from the chart to support your answer.

Identify at least THREE things we can expect as global temperatures increase. (please number each one)

Which of the following statements about industrialized agriculture is NOT true? Mark only one oval.

• Industrialized agriculture relies on expensive equipment and uses large amounts of seed.

• Industrialized agriculture is also called high-input agriculture.

• Industrialized agriculture uses large amounts of financial capital, fossil fuels, water, and chemical fertilizers and pesticides.

• Industrialized agriculture produces about 10% of the world's food.

In the United States, industrialized farming is controlled by Mark only one oval.

• local farmers and their families

• a few giant, multinational corporations

• government

Industrialized agriculture practices monoculture, which is Mark only one oval.

• producing a single crop at a time.

• increasing the biodiversity of farmland.

• protecting crops from pests.

• planting a variety of crops in each field at the same time.

Which of the following statements is NOT true about traditional agriculture:

• Traditional agriculture is low-input compared with industrialized agriculture.

• Traditional agriculture provides the vast majority of the world's food crops.

• Traditional agriculture grows less of the world's food than industrial agriculture.

• Many traditional farmers practice polyculture.

Crops are grown without the use of chemical pesticides or fertilizers in:

• industrialized agriculture

• traditional agriculture

• organic agriculture

• regenerative agriculture

Polyculture

• is the practice of growing several crops on the same plot simultaneously.

• Polyculture keeps the topsoil covered, reducing soil erosion from wind and water.

• Polyculture increases biodiversity, reducing the chance of losing all or most of the year's food supply to pests.

• all of the above