Population Group of organisms from one species Live in the same place at the same time & interbreed
Population Compete for food, water, mates, etc. *Resource sharing determines how large and far apart populations are
Community Contains several interacting populations Change in one population will cause change in other populations
Ecosystem Interaction among populations in a community and the community’s physical surroundings (abiotic factors)
Ecosystem DIFFERENT TYPES OF ECOSYSTEMS: Terrestrial - forests, meadows, desert
Ecosystem DIFFERENT TYPES OF ECOSYSTEMS: Aquatic - (2 types) Freshwater - ponds, lakes, streams Salt water - marine
Aldo Leopold A Sand County Almanac Jan 11, 1887 to to April 21, 1948 “The land is a community is the basic concept of ecology, but that land is to be loved and respected is an extension of ethics.” Aldo Leopold Aldo Leopold
Recap... Organism - 1 animal (species) Population - several animals of same species Community - more than 1 species Ecosystem - biotic and abiotic factors within area Biome - group of ecosystems Biosphere - Earth
ENERGY.. Primary Producers Primary Producers Primary Producers 1. Producers - Autotrophs - use energy from sun or chemical compounds to make own food and nutrients
2. Consumers - Heterotrophs - depend on autotrophs for energy ENERGY...
Types of Heterotrophs: a. Herbivore - feeds only on plants b. Carnivore - feeds on other heterotrophs Scavenger - feed on dead animals Scavenger - feed on dead animals c. Omnivore - feeds on both plant and animal
3. Decomposers - (aka - detrivores) - Break down and absorb nutrients from dead animals - Break down complex compounds into simple ones ENERGY...
FOOD CHAIN... Used to show how matter and energy move through an ecosystem Autotrophs Heterotrophs Decomposers
Contains 3 to 5 “links” in length Example: algae fish heron Energy decreases after each link *some may be lost as HEAT FOOD CHAIN...
FOOD WEB... Interconnected food chains Shows all possible feeding relationships at each trophic level More realistic than food chain because animals eat more than 1 species 4Ecological Interactions Ecological InteractionsEcological Interactions