AP Biology Quiz 2 Flashcards
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| 7378393314 | Interactive View | communities as a superorganism. plants and animals band together by complex relationships | 0 | |
| 7378410258 | Individualistic View | communities do not achieve equilibrium they constantly change in response to disturbances and environmental variation | 1 | |
| 7378422216 | species richness | number of species that live within a community | 2 | |
| 7378426797 | relative abundance | commonness of a population |  | 3 |
| 7378430625 | dominant species | outnumber competitors (EX: tulip popular or sassafras) |  | 4 |
| 7378470258 | Trophic levels | organisms grouped on how they obtain energy (feeding step) |  | 5 |
| 7378482527 | autotroph (producer) | organism that uses energy from the sun or chemicals (bottom of food chain) |  | 6 |
| 7378487636 | heterotrophs (consumers) | organism that cannot produce their own food they must obtain it (omnivore, carnivore, herbivore) |  | 7 |
| 7378498479 | scavengers | do not kill. eats already dead organisms |  | 8 |
| 7378501391 | decomposers | breaks down dead organisms for food |  | 9 |
| 7378506061 | detritivore | feeds off of dead plant and animal remains (earth worms and maggots) |  | 10 |
| 7378511151 | Food chains | simple model used to show how matter and energy flow (decreases by 10%) |  | 11 |
| 7378520220 | Food web | shows all possible feedings for an organism |  | 12 |
| 7378527415 | Food web analysis | number of links increased with species richness (# of links contributes to stability) | 13 | |
| 7378537521 | Interspecific competition | view of competitions role (K selected believe competition has profound effect. R selected see more predation and physical disturbances) | 14 | |
| 7378552135 | Predators | can keep dominant species numbers in check so other species can survive. (elk reintroduced to Yellowstone) | 15 | |
| 7378557220 | Keystone species (predators cont.) | sea stars eliminated lead to increased mussels and outcompeting of barnacles and limpets (richeness decreased from 18 to 2-3) | 16 | |
| 7378580470 | Herbivores role | red algae dominates when exposed to air at low tide. with the periwinkle snail eating small amounts, population stays in check | 17 | |
| 7378605827 | intermediate disturbance hypothesis | species richness is greatest in communities that experience frequent disturbances (moderate) | 18 | |
| 7378614479 | Ecological succession | somewhat predictable series of changes in species composition |  | 19 |
| 7378632769 | Facilitation Hypothesis (succession hypothesis 1. Fit) | species modify the local environment in ways that make it less suitable for themselves but more so for others (predictable. EX lichen on rock) | 20 | |
| 7378647542 | Inhibition hypothesis (succession hypothesis 2. fIt) | new species are prevented from occupying a community by the species already present (replacement only occurs when dominant species dies out, 1st to colonize becomes dominate) | 21 | |
| 7378661693 | Tolerance hypothesis (succession hypothesis 3. fiT) | succession occurs because competitively superior species replace the inferior (hardwoods replace pines b/c they tolerate shade) | 22 | |
| 7378677432 | Disclimax community (DIS=DIS) | disturbance inhibits succession (grasslands and fire) | 23 |