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?

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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.

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

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

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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