Habitat loss and fragmentation - Article
4 important questions on Habitat loss and fragmentation - Article
In what landscapes are extinction cascades most likely to occur?
Landscapes with:
- Low native vegetation cover
- Low landscape connectivity
- Degraded native vegetation
- Intensive land use
What 2 extremes of approaches to understanding landscape modification are there?
- Species orientated - centered around individual species, which are believed to respond individualistically to their environment.
- Pattern orientated - focus on human-perceived landscape patterns and their correlation with measures of species occurrence, including species richness.
Explain what a variegated and a relictual landscape are.
- Variegated landscape: characterized by gradual boundaries between native vegetation and surrounding modified land. Often seen in areas with intensive livestock grazing.
- Relictual landscape: characterized by sharp boundaries between a minimal amount of remaining native vegetation and surrounding land. Often seen in areas with intensive agriculture.
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What are the 3 types of connectivity?
- Habitat connectivity - connectedness between patches of suitable habitat for a given individual species.
- Landscape connectivity - human perspective of the conectedness of native vegetation cover in a given landscape.
- Ecological connectivity - conectedness of ecological processes across multiple scales, including trophic relationships, disturbance processes and hydroecological flows.
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