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)