Flashcards
Species Intrxns [8]
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Flashcards do conjunto (16)
- 1metapopulationpopulation of spatially isolated subpops connected by dispersal,
only concerned with pop persistence - 2assumptions 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 - 3"blinking lights" modela pop won't go extinct if any one of its metapops goes extinct as long as the organisms persist in the whole pop
- 4source-sink model [draw the flow diagram]
- 5source-sink model [definition]no recolonization of the source territory if e>c in the sink territories
- 6abundance vs. densitytotal # of individuals in pop
vs.
total # of ind in pop per unit of area - 7types of absolute abundance estimates (2)(a) transects or quadrats
(b) mark and recapture - 8assumptions 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 - 9relative abundance estimates [examples]traps (catch/unit)
# fecal pellets/m^2
# bird calls every 15 min
road kill per mile of road - 10competition
- 11intraspecific competitionbtwn ind of same species
- 12interspecific competitionbtwn ind of diff species
- 13exploitation competitionindirect comp for shared resource
(food, water, space) - 14interference competitiondirect physical aggression
- 15competitive exclusionwhen one sp drives the other to extinction due to competition
- 16facilitating coexistence (4)(a) varied resources
(b) disturbance "bounce back"
(c) varied time and space
(d) predation on superior competitor