https://encrypted-tbn1.google.com/images?q=tbn:ANd9GcQOrw1l8QB4vgR-iRd_PpHGvaGT66s1ks2JJFHVqcbZCkpi4VH https://encrypted-tbn0.google.com/images?q=tbn:ANd9GcQnxqJkhff5jnciQJKPJMdz6NLOJ6wwS2F7Edc0pqviJKOwVP3U http://room42.wikispaces.com/file/view/frozen-tundra_60.jpg/34424225/frozen-tundra_60.jpg https://encrypted-tbn2.google.com/images?q=tbn:ANd9GcQLzI9lItHn2rscnwSi1tpvaciTyItSxswsgHNL0zkB88TcUV8VbA https://encrypted-tbn1.google.com/images?q=tbn:ANd9GcQAEXerUrTGltkqpjeB5pVQ9tuumYcjA9TrfN1cncDzLFnZlclWyw Feeding Relationships Producer Autotrophs – make their own food Convert solar energy into chemical energy Examples: Plants (terrestrial), algae and phytoplankton (aquatic) http://www.chlorella-therapy.com/en/images/agaricus/p01/pict_02.gif Feeding Relationships Consumer Heterotroph – gets food from their environment Herbivores – eat plants http://www.qrg.northwestern.edu/projects/marssim/simhtml/pics-for-sim/moose.jpg Carnivores – eat meat Omnivores – eat plants and meat Detrivores – feed on remains of organisms Decomposers – break down organic matter http://www.eoearth.org/images/191655/500x0/scale/grizzly_alaska_fr.jpg Examples: Animals, and some bacteria and protists. fireflyafrica.blogspot.com Trophic Levels Each link in a food chain is known as a trophic level. Arrows show the flow of energy and go from prey to predator Trophic Levels Food web: a. shows all possible feeding relationships in a community at each trophic level. b. represents a network of interconnected food chains. http://library.thinkquest.org/J0113170/forest/images/foodweb.jpg Look at the crickets. What do they eat? Look at the Birds. What do they eat? Trophic Levels Ecological Pyramid: show mass and energy at each trophic level Biomass: the amount of organic matter comprising a group of organisms in a habitat. As you move up a food chain, both available energy and biomass decrease. Only 10% of the energy goes from one level to the next. http://2.bp.blogspot.com/-DrCjIUt1Cf8/TgV6AwF4QnI/AAAAAAAAADk/83PL8UPrXZ0/s1600/EnergyPyramid.gif