Population Ecology Bellringer Can you name any natural

Population Ecology

Bellringer § Can you name any natural disasters that have affected human populations… Globally? In Florida? 2

Natural Changes In Communities • Is it normal for communities to change? 3

Natural Changes In Communities • Seasonal variations • Climate Change • Succession 4

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 • ___________: FIRST species to return to an area after a disaster Secondary Succession • Begins with ________rock • Can happen fast because the soil is ___________f rom the previous community • ____________/w iped out • Begins with ________ • Example: Rock ________ moss • 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?