| Term | Definition |
| limiting factors in an ecosystm | temp, water, food access |
| tolerance range for species | temp. light, soil acidity |
| optimal range | best environment for species |
| abiotice factors | light water nutrients acidity temp salinity ( salt content) |
| influence of biotic factors | species compete for space ,food sources |
| predation | one animal kills another for food |
| mutualism | two species interact together for each others benefit |
| parasitism | one organism live on and feeds off of another organism to the detriment of the host |
| commensalism | two species interact with neither harm or benefit to each other |
| carry capacity | the upper capacity to support organisms with ecosystem ..human activity, irrigation , hunting , pollution, |