- Slides: 37
Interdependence within Environmental Systems
11 D Ecological Succession 2 types of succession • Primary • Secondary. Discuss with partner what you know about each. Succession video What are pioneer species?
Fact or Fib • Primary succession takes only a few years. • Secondary succession is a result of volcanic activity like Mt. St. Helens. • 1’ has lichens and moss as the first pioneer species. • 2’ is the rebuilding of an established area. • Climax communities will be reached about the same time. • Hurricane destruction is an example of 1’.
12 A Relationships Among Organisms • • Symbiotic relationships 5 types Predation + Competition + Parasitism + Commensalism + 0 Mutualism + +
Symbiotic relationship card activity • Each card will have a buddy card that creates one of the 4 symbiotic relationships. EX: lion and wildebeast. • Put the 4 relationship cards at the top of your desk. Which type of relationship is the example? Place the cards in that category. • GO!!!! First one all correct gets a prize.
12 C Matter and Energy Flow—food web and energy pyramids. • What do the arrows in a food chain or web show? – Flow of energy—only goes up. • What is a producer? – Makes its own food—plants. – Located where in food chain/web? • Bottom
What is a(n) …………. • • • Herbivore Carnivore Omnivore Detritivore decomposer
Trophic levels (energy levels)
Levels of food web • • • Producer First level (order) consumer Second level (secondary) consumer Third level (tertiary) consumer Fourth level (quaternary) consumer (TOP)
Marine food web
Desert food web
Forest food web
Ecological pyramids • Biomass
Energy pyramid Stored energy decreases as the pyramid increases
biomagnification • Increasing amounts of toxins (poison) as you go up the pyramid
DDT was a pesticide used to rid crops of bugs. Runoff into rivers and streams.
12 F Environmental Change • Ecosystem stability—examples • Cycles – N-nitrogen—bacteria turn nitrogen into different form plants can use – C-carbon—most carbon stored in ground but disrupting can release – P-phosphorous—used in DNA-making amino acids which make proteins – Water-recycle the water – Oxygen-photosynthesis
• https: //www. youtube. com/watch? v=nz. Imo 8 k SXi. U carbon cycle • https: //www. youtube. com/watch? v=le. Hy. Y_8 n. Rs nitrogen and phosphorous cycle • What happens if one is disrupted?