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ENV510 Landscape Ecology and GIS
Definitions
& descriptions |
Structure
& pattern | Function
& process | Change
& dynamics | Management
implications
Processes
| Elements | Transformation
| Fragmentation
| Ecosystem
| Equilibrium
| Dynamics
| Other
Extinction
and colonisation rates
Connectivity
Supersaturation
Colonisation,
extinction and recolonisation rely on the ability of species to get to and from
patches.
Connectivity
is important in determining flows across the landscape. Corridors can vary in
their degree of connectivity, as can the matrix. Corridors are of value for
movement of species and materials to ensure persistence of species but they
can also facilitate the spread of disease, pests and fire, and increase predation,
which can increase the risk of extinction (Forman,
1995).
Sometimes overcrowding can occur in patches, or what is known as supersaturation. This can result in changes in competition and predation, which eventually lead to altered fecundity.
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