Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Glossary Entry Producer: Organisms that produce organic compounds for the entire ecosystem Consumer: Organisms that obtain food by eating other organisms Decomposer: Recycles nutrients by feeding on dead or decaying organisms Food Webs Communities A community is an assemblage of all the populations of organisms living close enough together for potential interaction. Communities The biodiversity of a community is the variety of organisms that make it up. It includes: The total number of different species in the community The relative abundance of the different species Niche A niche is the position or function of an organism in a community. Predation In predation, one species eats another. The predator is the consumer, the one who eats. The prey is the food, the one being eaten. Succession After a disturbance like a fire, storm, or flood, the ecosystem transitions from nothing to new life, in a process called succession. Primary succession happens when there is no soil present, such as after a volcano. Secondary succession occurs where a disturbance has left some soil, such as after a fire. Food chains and webs Food chains and food webs show the flow of ENERGY through an ecosystem. All energy ultimately comes from the SUN. Agenda Color, cut, and arrange the organisms in the food web on a blank piece of paper. Answer the questions on the back of the directions. Staple these together and turn them in before you leave. CLEAN UP ALL ART SUPPLIES AND PAPER SCRAPS! Glossary Entry Carnivore: An animal that eats a diet of only meat Herbivore: An animal that eats a diet of only plants Omnivore: An animal that eats a diet of meat and plants Energy flow Energy starts at the producer level (plants) Then moves up to primary consumers (herbivores) Then to secondary consumers (carnivores) Followed by tertiary and quaternary consumers… Producers Producers make food. They are also autotrophs, and typically include plants. Consumers Consumers eat things. They are heterotrophs. They include: Herbivores: eat plants Carnivores: eat animals (meat) Omnivores: eat both plants and meat Decomposers All food chains and webs have decomposers or detritivores These organisms, including bacteria, worms, rodents, insects, catfish, fungus, and vultures, eat detritus, the dead material produced at every level of a food chain. Food Webs A food web is a network of food chains, and is a more realistic view of energy flow. Every food web MUST include the SUN and DECOMPOSERS Energy As you go up a level in a food chain or web, only 10% of the energy from the level below is transferred to the next level. 90% is lost as HEAT. Because the production pyramid tapers so sharply, a field of corn or other plant crops can support many more vegetarians than meat-eaters TROPHIC LEVEL Secondary consumers Primary consumers Human meat-eaters Human vegetarians Cattle Corn Corn Producers Figure 36.12 Agenda Using the organisms you received, create a poster showing the food web of your biome. Answer the questions on the directions, and staple this to the back of your poster. Refer to the rubric to be sure you get an A! CLEAN UP ALL ART SUPPLIES!