Population Ecology

Bellringer Can you name any natural disasters that have affected human populations… Globally? In Florida? Access prior knowledge and lead class discussion. Clarify all definitions and bulleted topics. 2

Natural Changes In Communities Is it normal for communities to change?

Natural Changes In Communities Seasonal variations Climate Change Succession

Succession Series of predictable changes in community (move in/move out) After a catastrophe, what do you think the ecosystem will do first to recover?

Types of Succession Primary Succession Secondary Succession _____________________: FIRST species to return to an area after a disaster Begins with _______________rock _______________________/wiped out Example: Rock  ________________ moss Can happen fast because the soil is ______________________from the previous community Begins with _______________ Example: grass  shrub  ______________________

Check for Understanding Activity Mt. Rainier erupted leaving nothing but bare rock and the succession of the ecosystem is described in the images below. Give each photo a description and be sure to use the words: primary, secondary, succession, pioneer species, soil, and rock. Circle the image that represents primary succession.

Biodiversity ____________________ is the variety of life in a particular ecosystem or habitat How much biodiversity do we have in the classroom? Is there more or less biodiversity in a rainforest?

Check for understanding What has more biodiversity: a tundra or a rainforest? Explain your answer!

Benefits of Biodiversity Why might it be a good thing to have different types of organisms in an area? VS.

Check for Understanding Which would be more affected by removing a species? A tundra or a rainforest? Which would be more affected by a catastrophe? A tundra or a rainforest?

1. Food, water, shelter, and a HOT Question! 1. Food, water, shelter, and a space in which to live all describe an organism's: A. biome B. population C. habitat D. community.

HOT Question! 2. Which is a natural cause of ecosystem change? A. Farming B. Building fences C. Pollution D. Hurricane

HOT Question! 3. What kinds of conditions might prevent community from returning to its pre-disturbed state following a catastrophe?