| A | B |
|---|
| Nutrient | any food or element an organism must take in to live, grow, or reproduce |
| Predation | A symbiotic relationship in which an organism kills another organism |
| S-shaped curve | leveling off of an exponential, J-shaped curve when a rapidly growing population exceeds the carrying capacity of its environment and ceases to grow |
| Sustainability | ability of a system to survive for some specified time |
| Symbiosis | any intimate relationship or association between members of two or more species |
| Synergy | used to describe a situation where the final outcome of a system is greater than the sum of its parts |
| Uniform Distribution | a rare type of population distribution where the population is evenly spread out |
| Succession | The replacement of one community by another, developing toward a climax |
| Cosmopolitan Species | have ranges that stretch over several continents |
| Endemic Species | have ranges that are isolated to a small area on a single continent |
| Active Movement | requires an organism to use some appendage to move (walking, flying, swimming, etc) |
| Passive Movement | requires an organism to use an external force to cause transit (wind, water, etc) |
| Invasive Species | A species that has moved into an area and reproduced so aggressively that it has replaced some of the original species |
| Numbers pyramid | compares the number of individuals in each trophic level |
| Biomass pyramid | compares the the total dry weight of the organisms in each trophic level |
| Kilocalories | unit of measure of energy |
| Logistic growth | growth rate decreases (mortality rate grows) as the population grows due to density-dependent factors (predation rates, competition, disease) |
| Lichen | A symbiotic relationship between a fungus and a moss |
| Saprophyte | organism (ex: mushroom) on a rotting log that ingests decaying organic material(decomposing animal bodies) |
| Litter | top layer of soil containing decaying plant and animal material |
| Rule of 70 | Way to estimate population growth |
| Doubling time | years for population to double its size |
| Common Greenhouse Gasses | Carbon dioxide, Methane, water vapor, nitrous oxide, ozone, CFCs |
