Terms : Hide Images
| 483610388 | ecosystem | Consists of all the organisms living in a community as well as all the abiotic factors with which they interact. |  | 0 |
| 483610389 | Law of Conservation of Energy | Energy can never be created nor destroyed; only transformed. |  | 1 |
| 483610390 | 2nd Law of Thermodynamics | In any energy exchange, if no energy enters or leaves the system, the potential energy will always be less than the initial state (entropy). |  | 2 |
| 483610392 | detritivores | Obtain energy from detritus. |  | 3 |
| 483610393 | detritus | Nonliving organic maters such as remains of dead organisms, feces, fallen leaves, dead wood. |  | 4 |
| 483610394 | primary production | Amount of light energy converted to chemical energy by autotrophs. |  | 5 |
| 483610395 | gross primary production (GPP) | Amount of light energy that is converted to chemical energy by photosynthesis. |  | 6 |
| 483610396 | net primary production (NPP) | Energy used by primary producers for respiration. |  | 7 |
| 483610397 | light limitation | Depth to which light penetrates limits primary production. |  | 8 |
| 483610398 | limiting nutrient | Greater limiting factor than light in oceans and lakes. |  | 9 |
| 483610399 | eutrophication | Sewage and fertilizer runoff adds nutrients to lakes; phytoplankton decreases and cyanobacteria increases. |  | 10 |
| 483610400 | actual evapotranspiration | Annual amount of water transpired by plants and evaporated from landscape. |  | 11 |
| 483610401 | secondary production | Amount of chemical energy in consumers' food that is converted to new biomass. |  | 12 |
| 483610402 | production efficiency | The fraction of energy stored in food that was not used for cell respiration. |  | 13 |
| 483610403 | trophic efficiency | Percentage of production transferred from one trophic level to the next. |  | 14 |
| 483610404 | pyramid of energy | 90% of all energy is lost between trophic levels. |  | 15 |
| 483610405 | 10% rule | Only 10% of the total energy produced at each trophic level is available to the next level. The amount of energy passed up to the levels of the food pyramid reduces as you go up. |  | 16 |
| 483610406 | pyramids of biomass | Each tier represents standing crop. |  | 17 |
| 483610407 | turnover time | The time required to replace the standing crop of a population or group of populations, calculated as the ratio of standing crop to production. |  | 18 |
| 483610408 | pyramids of numbers | Number of organisms at each trophic level. |  | 19 |
| 483610409 | Green World Hypothesis | Terrestrial herbivores consume relatively little plant biomass because they are held in check by predators, parasites and disease. |  | 20 |
| 483610410 | critical load | The amount of added nutrient that can be absorbed by plants without damaging ecosystem. |  | 21 |
| 483610411 | biological magnification | Toxins become more concentrated in successive trophic levels. |  | 22 |
| 483610412 | Greenhouse Effect | Carbon dioxide and water vapor in atmosphere trap infrared radiation, re-reflecting it back toward earth. |  | 23 |
| 483610413 | ozone layer | Protective layer in atmosphere that shields earth from UV radiation. |  | 24 |
