Unit 7, Day 3 Homework Quiz (6) • Open Note (stamp) ▫ Autotrophs (all types) ▫ Heterotrophs (all types) ▫ Food Chains ▫ Food Webs ▫ Producers and Consumers (all trophic levels) ▫ Energy, Biomass, and Numbers Pyramids Agenda (1) • • • • • • • • • Homework Quiz Agenda Homework Debrief Learning Goal String Activity Activity Analysis Pyramid Activity Island Application (Research) Homework Homework Debrief (6) • • • • • • Autotrophs (all types) Heterotrophs (all types) Food Chains Food Webs Producers and Consumers (all trophic levels) Energy, Biomass, and Numbers Pyramids Learning Goal (1) • Objective 2.5.F (Energy Models) – I can describe how energy flows through an ecosystem and I can model this with food chains, food webs, and ecological pyramids. String Activity (15) • If possible, find the person with the same word • Together, hypothesize if/who you consume AND if/who consumes you ▫ There may be multiple answers! • Approach those other organisms. IFF they agree with your hypothesis, then place a string between you. ▫ Try to keep string untangled ▫ Please do not push through strings Activity Analysis (10) • Based on what we as a class determined, work with your table to draw a food web. • Determine what each organism is: primary producer, primary consumer, secondary consumer, tertiary consumer, detritivore, or decomposer ▫ It’s okay for you to be incorrect! Take a risk. • Alligator Lizard, Bacteria, Cricket, Dead Animals, Dead Leaves, Earthworm, Fox, Fungus, Hawk, Maggots, Maple Tree Leaves, Millipede, Mushrooms, Pillbugs, Robin, Rotting Log, Sun Activity Debrief (3) Notes (4) • Detritivores CONSUME detritus ▫ Detritus = dead plants/animals, feces ▫ Millipedes, woodlice, dung flies, slugs, worms, sea stars, sea cucumbers, fiddler crabs • Decomposers CAN’T EAT. They ABSORB & BREAK DOWN cells. ▫ Bacteria (dec. meat), fungi (dec. fruits/veggies) Pyramid Activity (4) • On panel 1: ▫ Ecological Pyramids Graphs of trophic structure ▫ Trophic levels (feeding position) Primary producer = autotroph Primary consumer = herbivore Secondary/Tertiary consumer = omnivore/carnivore Pyramid Activity (8) • Panel 2 • Pyramid of Energy ▫ Flow of energy ▫ Lose 90% of energy as heat Only 10% of energy available for next trophic level ▫ Base has 100% of energy available Pyramid Activity (8) • Panel 3 • Pyramid of Biomass ▫ Biomass per area ▫ Biomass = mass of each individual x number of individuals at each trophic level ▫ g/m2 Pyramid Activity (8) • Panel 4 • Pyramid of Numbers • # of individuals per area • Large # of producers at base • Lower # of carnivores at top ▫ (Usually) Island Application (22 + 3 cleanup) • Must have primary producers, primary consumers, secondary consumers, tertiary consumers, and decomposers. • Must contain autotrophs, herbivores, omnivores, carnivores, and detritivores. • Create a food web that contains at least 3 organisms at each trophic level + decomposers + detritivores • Humans do not count! Homework (1 min) • Due Wed 4/17 or Thu 4/18 ▫ YouTube Video: Biogeochemical Cycles ▫ Homework Quiz: Biogeochemical Cycles • Homework quiz is open note • Suggestion: Draw each cycle!!!