Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
primary succession
|
on truly bare (sterilized) space-volcanic lava field; rock exfoliation, receding glaciers
|
|
|
secondary succession
|
space has been opened and de-populated, but some residual biota has survived (more common than primary succession)
|
|
|
degradative success (eg. in rotten log or infested acord)
|
habitat modified by inhabitants, disappear over time
|
|
|
climax
|
late successional stage in which dominant species can replace themselves; young of climax species can successfully recruit under established adults
|
|
|
succession
|
sequential changes; following disturbances, in the dominant biota occupying and affecting a site
|
|
|
energy flows
|
a small fraction of solar radiation is fixed by photosynthetic organisms, but onece energy is dissipated as heat, it is never recovered by ecosystem (except as passive energy savings for transport)
|
|
|
material cycle
|
atoms (H,O,C,N,Ca,P) created in stars, used again and again, end up in different pools, fluxes trasfer atoms between pools
|
|
|
turnover time
|
if system is in equilibrium so input=output=q, residence time or turnover time
|
|
|
stream spiraling
|
downstream transport with periodic cycling by local biology
|
|
|
zero trophic levels
|
drinking their own automobile exhaust
|
|
|
one trophic level
|
nutrient assilimilation and retention, but eutrophication
|
|
|
two trophic levels
|
vegetation grazed down, but pesiferous insect emergence
|
|
|
three trophic levels
|
small fish
|
|
|
four trophic levels
|
bigger fish
|
|
|
five trophic levels
|
really big fish, anglers, and wildlife
|
