Figure 4.6
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Factors Affecting Biodiversity: Keystone Species and Geological Environment, Slides of Human Resource Management
The role of keystone species, such as sea otters and urchins, in maintaining biodiversity through the restoration of kelp forests. Additionally, it explores the factors that increase and decrease biodiversity, including geological environment, disturbance, environmental conditions, productivity, pollution, fragmentation, and invasive species.
Typology: Slides
2012/2013
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Keystone Species (3)
Sea otters, urchins, and kelp
- Kelp forests: three parts – rootlike holdfast, stem
(stipe), and blades (leaves)
- Holdfast attached to boulders or the rocky
bottom, part of the active geological
environment
- Urchins fed on the holdfast of kelp
- Sea otters restored and fed on urchins, kelp
forests restored
Figure 4.9a
Figure 4.9b
Factors to Reduce Biodiversity
- Extreme geological environment
Extreme disturbances damage habitats Limit the number of habitats and ecological niches at a local scale Pollution and other stresses restricting the flow of energy and nutrients
- Fragmentation of ecosystems by land use transformation
- Intrusion of invasive exotic species
- Habitat simplification (engineering structure) or migration barriers