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LIMITING FACTOR Teachers: Delaney Rothstein, Erica Hoh, Lauren DeGraff DEFINITION AND EXAMPLES Limiting Factors: Any factor or condition that limits the growth of the population in an ecosystem • Tangible: able to touch or feel • Tangible Example: Climate, the available shelter, sunlight, and water • Non tangible: objects or nouns that can not be touched or felt • Nontangible Examples: Diseases, available food, and hunting animals • Site: http://www.worldbookonline.com/sc iencepower/player?id=sci1competitio839981&spread=s05&unitid=200 • “Physical Factors” “Temperature” “Nutrients found in the materials consumed by organisms” “Salinity =the taste sensation when common salt is placed in the mouth” “Light sources that are approachable” “ Biological limiting factors” “The amount of rivals dueling the specimen or population for food” “ The amount of predators and the amount of Herbivores Site: http://www.geo.arizona.edu/geo4xx/geos412/OcSci07. EcolIntro.pdf Video: http://studyjams.scholastic.com/studyjams/jams/science /ecosystems/population-growth.htm ELABORATION OF REAL LIFE EXAMPLES • Due to the lack of nutrients in the soil farmers have to put down fertilizer so that his/her plants will grow. • Fertilizer runs into lakes which can increase the population of algae. The algae absorbs the oxygen from the lake and limits the fishy population. ANOTHER COMPONENT OF LIMITING FACTORS: ECOLOGICAL BALANCE “ Ecology is the science of the study of ecosystems. Ecological balance has been defined by various online dictionaries “as a state of dynamic equilibrium within a community of organisms in which genetic, species and ecosystem diversity remain relatively stable, subject to gradual change through natural succession.” and “A stable balance in the number of each species in an ecosystem.” “The most important point being that the natural balance in an ecosystem is maintained. This balance may be distributed due to the introduction of introduced species, the sudden death of some species, the natural hazards or man-made causes.” Citations: http://wwf.panda.org/aboutour_earth/teacher_resources/webfieldtrips/ecologica l_balance/ LIMITING FACTORS= Awesome!!!!!