29 Apr 2002
Obj. Draw a Food Web for the Antartic
Changes in Antarctic Food Webs
The food chain in the ice-cold Antarctic Ocean is based on phytoplankton--microscopic algae that float near the water's surface. The algae are eaten by tiny shrimplike krill, which are consumed by baleen whales, squid, and fish. The fish and squid are eaten by toothed whales, seals & penguins. Humans have hunted baleen whales, for the past 150 years, greatly reducing their numbers. Now that most countries have put a stop to whale hunting, there is hope that the population of baleen whales will increase. How will an increase in the whale population affect the food web?
Solve the Problem
1. Use microsoft word template to draw a food web for the Antarctic (Use a search engine <<Google>> to find pictures of the biotic factors)
2. Which organisms compete for the same source of food
Make & Use a Graph Activity
Use microsoft powerpoint to graph the population density of a deer population over the years.
Plot the number of deer on the y-axis and the years on the x-axis.
Propose a hypothesis to explain what might have happened to cause the changes in the size of the population.
Arizona Deer Population
year Deer per acre
1905 5.7
1915 35.7
1920 142.9
1925 85.7
1935 25.7
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