2737937
Description
Flashcards by Anya Skovoroda, updated more than 1 year ago
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Created by Anya Skovoroda
almost 9 years ago
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| Question | Answer |
| metapopulation | population of spatially isolated subpops connected by dispersal, only concerned with pop persistence |
| assumptions of metapops (3) | (a) v.large network quality patches separated by bad habitat (b) connected by dispersal w/prob of recoloniz :=c (c) prob of extinct := e |
| "blinking lights" model | a pop won't go extinct if any one of its metapops goes extinct as long as the organisms persist in the whole pop |
| source-sink model [draw the flow diagram] | |
| source-sink model [definition] | no recolonization of the source territory if e>c in the sink territories |
| abundance vs. density | total # of individuals in pop vs. total # of ind in pop per unit of area |
| types of absolute abundance estimates (2) | (a) transects or quadrats (b) mark and recapture |
| assumptions of absolute abundance estimates (4) | (a) random capture (b) marking doesn't increase risk of death (c) marks are lost or missed (d) no immigr/emigr |
| relative abundance estimates [examples] | traps (catch/unit) # fecal pellets/m^2 # bird calls every 15 min road kill per mile of road |
| competition | |
| intraspecific competition | btwn ind of same species |
| interspecific competition | btwn ind of diff species |
| exploitation competition | indirect comp for shared resource (food, water, space) |
| interference competition | direct physical aggression |
| competitive exclusion | when one sp drives the other to extinction due to competition |
| facilitating coexistence (4) | (a) varied resources (b) disturbance "bounce back" (c) varied time and space (d) predation on superior competitor |
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