Aquatic Ecology 1
lecture August 23
Terms : Hide Images [1]
| temperature bipolarity | ||
| 103.4 degrees | ||
| decreases | ||
| epilimnion | ||
| lowest and often coldest level of a lake | ||
| Top layer of a lake | ||
| middle layer of a lake | ||
| metalimnion | ||
| area in a lake where the temperature gradient is greater than that of the area above that is warmer and the area below that is colder | ||
| pertaining to the 24 hour period of a regular daily cycle | ||
| the deep bottom of the lake | ||
| middle of the lake | ||
| marginal area; sides of the lake ecept in especially steep lakes | ||
| organisms that float on the surface film of open water | ||
| 2 turnovers; spring and fall | ||
| decreases | ||
| one mixing/turnover event annually | ||
| -tropical area with little temperature change that may have a slight cooling period -frozen lake that has a short thawing period in the spring or summer | ||
| never has a turnover | ||
| -permanently frozen -uniform environment; tropical all the time without thaw -lake with a depth greater than 1mile (only see turning above thermocline) | ||
| multiple mixes | ||
| if the wind blows on a shallow lake i.e Lake Utah | ||
| indicative of the type of fluid flow... turbulent or smooth flowing--larger the number the greater the turbulence |