Presentation on theme: "Bell Ringer for 10/19 Take a sheet from the front of the room."— Presentation transcript:
1 Bell Ringer for 10/19 Take a sheet from the front of the room. Put it into your binder in the class handouts/class work section (look at your table of contents page to see where this is)Work with your partner on filling in the “Survival Relationships” page (Venn Diagram AND ?’s below)Flip to your binder check sheet as I come around.You have 6 minutes!
2 Parasitism Commensalism Mutualism 1 organism harmed, 1 benefitted 1 organism left neutral, 1 benefittedONLY 1organismbenefittedSurvival relationshipsBetween 2 organismsTake place over extended timeONLY 1organismbenefittedNeither organism harmedBoth organisms benefitMutualism
3 Class Announcements Article half sheet due tomorrow Graphing and questions about deer populations due tomorrowIf either are done early, turn them in to the folder as you leave the classToday during tutoring after school is the last chance you have to make up the exam from last Thurs Rm. 313 after 9thKeep sheet in your binder, do not turn in.
4 Nutrition & Energy Flow Chapter 2, Section 2:As with yesterday, this ppt mostly focuses on making connections between the vocabulary terms. Notes are encouraged, but writing down definitions of the terms is not, as you should have them on your index cards.
5 How are these items related to one another in an ecosystem?
6 How Organisms Obtain Energy The Sun is the ultimate source of energy for life.
7 Producers Photosynthetic Autotrophs Use light energy to make glucose Sun flower, grass, algae bloom – Qingdao, China (hosted Olympic sailing)
8 Consumers Heterotrophs Herbivores = feed only on plants Carnivores = eat other heterotrophsScavengers = eat dead animalsOmnivores = eat both animal and plant materialsDecomposers = break down and release nutrient from dead organismsVulture: Scavenger; African WildDog: Carnivore (most efficient carnivore – kill 90% of prey they go after – work in groups); Zebra: Herbivore; Chimpanzee: Omnivore (Eat fruits and meat); South Arican Mushroom: Decomposer
9 Flow of Matter and Energy in Ecosystems Models to show how energy moves in one direction through an ecosystemFood ChainsFood WebsEcological Pyramids
10 Ex: berries mice black bear Food ChainArrows show transfer of energyEx: berries mice black bearA portion of energy is given off as heat at each transferAmount of energy in final transfer is only a fraction of what was at the first transfer
11 Trophic Levels = Each organism represents a feeding step in the movement of energy Note: Book calls them 1st, 2nd, 3rd order heterotrophs
12 Food WebShows all possible feeding relationships at each trophic level in a community
13 Ecological Pyramids Base always represents 1st trophic level Higher trophic levels are layered on top of one another
14 Pyramid of Energy = Energy decreases with each trophic level moving up Total energy transfer from one trophic level to the next is only about 10%
15 Pyramid of Biomass = Less living material as you move up trophic levels
16 Cycles in NatureMatter moves through the trophic levels of an ecosystem.Energy can be lost through heat; Matter is not gained or lost, it is recycled.Ex: Water Cycle, Carbon Cycle, Nitrogen Cycle, Phosphorous Cycle
17 Water Cycle Water present 3 billion years ago is still present today It’s been recycled between land, ocean and atmosphereEvaporation (water gas)Condensation (clouds)Precipitation (rain)
19 The Carbon Cycle Putting Carbon in the Ground: Plants use CO2 to create carbon compounds (sugar) for growth and energyConsumers eat plants and/or other animals to get carbon compounds for growth and energyPlants and animals die, carbon is returned to the ground where fossil fuels can formPutting Carbon in the Atmosphere:CO2 gets released during cell respirationCO2 released when burning fossil fuels
22 The Phosphorous CycleSee figure 2.20 on page 57
23 PracticeWhy is a pyramid a good shape to represent how matter and energy transfer in an ecosystem? Why not use a circle or a square?
24 According to the Law of Conservation, matter can neither be created nor destroyed. Make a relationship between this statement and the recycling of carbon in an ecosystem. (Hint: All life on this planet is carbon based. What happens to a tree that dies & falls in a forest? Who benefits from the dead tree?)