11CHEMOSYNTHESISChemosynthesis is the process by which organisms use CHEMICAL energy to PRODUCE carbohydrates.Making food without sunlight!Example: Bacteria
12ENERGY FLOWIf AUTOTROPHS are called PRODUCERS, because they make their own food, what are HETEROTROPHS called?
13CONSUMERSOrganisms that consume plants or other organisms to obtain energy.All organisms that are NOT producers!!! (Heterotrophs)Three categoriesPrimarySecondaryTertiary
14PRIMARY CONSUMERS Herbivores Examples SECOND TROPHIC LEVEL Eat plants or other primary producersExamplesCowsHorsesRabbitsSome InsectsSECOND TROPHIC LEVEL
15SECONDARY CONSUMERS Carnivores Omnivores THIRD TROPHIC LEVEL Animals that eat animalsExamples: tigers, wolves, snakesOmnivoresAnimals that are herbivores and carnivoresExamples: bears, humansTHIRD TROPHIC LEVEL
16TERTIARY CONSUMERS Carnivores that consume other carnivores Known as “top carnivores”Example:A hawk that eats a snakeA lion that eats a hyenaFOURTH TROPHIC LEVEL
17DETRITOVORESDecomposes organic material and returns the nutrients to the soil, water and air (making it available for other organisms).Examples: mites, earthworms, snails, crabs
18DECOMPOSERS Break down and absorb nutrients from dead organisms They cause decayDecomposition of bodies and wastes releases nutrients back into the environment to be recycled by other organisms.Examples: bacteria, fungi
19SCAVENGERSDo not kill their food—they search for a source of food that is already dead“Clean-up” the ecosystemExamples: buzzards
20FEEDING RELATIONSHIPS Energy flows through an ecosystem in ONE direction:Sun (or inorganic chemicals)Autotrophs/ProducersHeterotrophs/Consumers
21FOOD CHAINA food chain is a series of steps in which organisms transfer energy by eating or being eaten.It is how energy moves through an ecosystem!
22FOOD WEBA food web is a network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
23FOOD CHAIN vs. FOOD WEBA food web will link together all of the food chains in a particular ecosystem…
46HABITATThe area where an organism livesIncludes both biotic and abiotic factors
47Biotic vs. Abiotic Biotic Bio- means: life Tic- means: pertaining to Biotic factors are the living organisms in a habitat!AbioticBio- means: lifeTic- means: pertaining toA- means: no, notAbiotic factors are all the physical aspect of a habitat!Examples: soil, water, weather