Succession in Biomes: Plant Adaptations and Environmental Changes

1. Catalyst #3: September 2nd, 2014 1. In a particular biome, plants must have rot-resistant roots due to the high rate of precipitation. In which of the following biomes would these plants be found? 2. The kudzu plant was imported into the United States as a decorative plant and was later planted to help reduce soil erosion. Kudzu is a vine that grows in a wide range of soil types and conditions. Due to its rapid growth, the plant has taken over many native plant species. Kudzu is an example of: Native species b. Non-native species c. Invasive species d. Both B and C A 3. Did you do anything fun over Spring Break? Share! B C

2. Agenda • Catalyst: 5 minutes • Succession Notes: 20 minutes • Succession Learning Menu: 20 minutes • Reminders: • DBA #3 due 9/8 • Honors Projects due 9/26

3. Announcements • Dojo review • Accountants • Unit 1 exam one week from today • DBA #3 due 9/8

4. Objectives • SWBAT analyze the events leading to biological succession. • SWBAT sequence the events necessary for both primary and secondary succession.

5. SUCCESSIONNatural Change Over Time

6. Key Point 1: What Is Succession? A series of predictable changes over time in the kind of plants growing in an area.

7. Key Point 2: Climax Communities • Climax communities are the relatively stable communities at the end of succession • Vary with location and biome • Persist until there is some kind of environmental change. • Environmental changes are called disturbances

8. Key Point 3: Disturbances • Disturbances be caused by natural events like fire, windstorm, volcanic eruption, landslides, etc. • Can be caused by human activities such as deforestation or pollution • Can be caused by animal activities such as grazing or pest infestation

9. CFU 1

10. Key Point 4: Primary Succession • Primary succession occurs when plants become established on land completely devoid (lacking) of soil and vegetation Mount St. Helen’s, 1980 When there is no soil, the first colonizers are lichens and mosses– soil makers

12. Key Point 5: Secondary Succession • Secondary succession occurs when the dominant plants in the community are removed, allowing new plants to colonize. • The first plants are called “pioneers”– annual, fast- growing, full sunlight, many seeds

13. CFU 2: Primary or Secondary?

14. Key Point 6: Typical forest succession Non-vascular plants (lichens and mosses) Annuals and weeds Herbaceous (not woody) plants and grasses Woody shrubs, grasses, tree saplings Young forest Mature trees

15. Key Point 7 • Each plant group changes the environment. Lichens and mosses make soil, Enabling annuals and weeds which produce, seeds, humus and shade, Allowing perennials and shade-tolerant species, Leading to young trees and other woody plants, Eventually producing a mature forest • As the ecosystem changes, the animals change to accommodate the available food and shelter.

16. Learning Menu

17. Exit Ticket