1. Volcanoes?! http://www.history.com/shows/how-the-earth-was-made/videos/the-krakatoa-volcano#the-krakatoa-volcano

2. What did you notice??

3. Regrowth!

4. Krakatoa & Plants What happened over time with the ecology of Krakatoa?

5. Succession Succession is the changes that take place in a community as it gets older Primary and Secondary Climax community is the last or final stage of succession – Little change in species

6. Ecological Succession

7. Primary…  No top soil…yet  Bare rock  Very slow progression

8. Primary…  Soil begins to form from decaying material  As more “soil” is formed, more plants are able to grow

10. Primary Succession Establishment of a community on exposed rock w/o topsoil – Pioneer species (lichens/mosses) create soil by breaking down rocks Rock, bare soil, weeds and annual plants, grasses, small plants, Forest

12. Secondary http://www.playingwithtime.org/cgi-bin/browser/gallerydisplay.pl?clipID=0120&page=3&sort=clipName&searchCriteria=  Soil is still present though!  What type of plants grow first?  Is this a quick or slow thing?

13. Secondary Succession Disturbance disrupts a community – Fire, flood, windstorm, etc – Soil and some species remain New plants/animals may take over at first – Natural tendency for species of mature community to return – weeds and annual plants, grasses, small plants, Forest

14. Check Your Knowledge Which type of succession is faster? A: Secondary! There is already soil present and areas nearby will help populate it

16. Pond Succession Lake, pond, marsh, dry land, weeds and annual plants, grasses, small plants, Forest

17. Biomes Climates – Average weather conditions, temp., precipitation 3 main climate zones: Polar = cold areas Temperate = hot to cold seasons Tropical = direct sunlight, always warm

18. Community Def. – interacting populations in an area at the same time Different organisms occupy different biomes – Different adaptations – Different communities around the world

19. Limiting Factors… Anything that prevents the number, reproduction, distribution, growth of an organism – Abiotic – Biotic – Sunlight, food, temperature, acidity of soil

20. Tolerance – ability of an organism to survive when subjected to limiting factors – Upper and lower limit = range

21. Review! Ecological Succession – http://www.mrphome.net/mrp/succession.swf