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METAPOPULASI (1): Konsep Dasar
Ani Mardiastuti
Basics in Metapopulation
• True island vs. habitat island
• Patch vs. matrix
• Edge, ecotone, covey
• Abrupt vs. mosaic ecotone
• Edge species vs. interior species
• Metapopulation
True Island
Habitat Island
Habitat Island : Trees for caterpillars
Habitat Islands : Lakes for fishes
Edge, Ecotone
Matrix (unsuitable habitat)
and Habitat Patches (suitable habitat)
Metapopulation
Metapopulations (Levins, 1970)
- A population of
populations
- Sets of sub divided
populations in which
rates of mating,
competition, and other
interactions are much
higher within than
among population
Population
A
Population
B
Metapopulations
- Discontinuous in distribution
- in spatially disjunct patches of suitable habitat (patches) separated by intervening unsuitable habitat (matrix)
- Dispersal is restricted
- High probability of local extinction
- Balance between extinction within patches versus recolonization among patches (dispersal)
Panmictic (Well Mixed) vs Metapopulation
n = 100
n = 67
n = 33
Panmictic Levins Metapopulation
p = 1.00
p = 0.33
p = 0.67
Tim
e
Gen Flow in Metapopulation Concept
Source-Sink Model
Also known as :
Core-sink model
Core-satellite model
Mainland-island model
Source-Sink Model
Source- Sink
(Core-Satellite)