7B - INTERACTIONS & POPULATION SIZE
Strand: 4.1.B.a, 4.1.D.a, 4.3.B.b
Objective: Explain how biotic and abiotic factors work together in an ecosystem to control a population (succession, population density, fragmentation, human impact)
unit_7_objective_b_take_2.pptx | |
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types_of_symbiosis.pdf | |
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NOTEBOOK ENTRY - INTERACTIVES: Complete the following three interactives (the black button links). You will need to complete each interactive and document it in your notebook. Use the following instructions to document each one:
- BARNACLE INTERACTIVE: For this activity you will need to draw a few pictures. Label each one appropriately. Draw the following pictures in your notebook (1) ecosystem with the normal distribution of the balanus barnacles alone, (2) ecosystem with the normal distribution of the chthamalus barnacles alone, (3) the ecosystem with the modified distributions of each when both barnacles are present. Then explain why this occurs.
- PREDATOR PREY INTERACTIVE: For this activity, draw the following images (1) the population growth graph if lynx were NOT present in the ecosystem, (2) the graphs of the lynx and hares when both are present in the ecosystem. Answer the following questions about the activity (A) What is the biotic factors affecting the hare population when lynx are NOT present? (B) What abiotic factors affect the hare population when lynx are NOT present? (C) What type of relationship do the lynx and hare have? (D) How does that relationship affect the populations of BOTH species?
- HUMAN POPULATION: For this interactive you will need to copy the human population growth curve as shown on the interactive. You will also need to mark each place on the graph and tell what significant event occurred and what impact it had on the human population. (On the graph you draw mark each time when something happened and then explain how that had an effect on human population growth)
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