Understandings:
- The distribution of species is affected by limiting factors.
- Community structure can be strongly affected by keystone species.
- Each species plays a unique role within a community because of the unique combination of its spatial habitat and interactions with other species.
- Interactions between species in a community can be classified according to their effect.
- Two species cannot survive indefinitely in the same habitat if their niches are identical.
Applications and skills:
- Application: Distribution of one animal and one plant species to illustrate limits of tolerance and zones of stress.
- Application: Local examples to illustrate the range of ways in which species can interact within a community.
- Application: The symbiotic relationship between Zooxanthellae and reef-building coral reef species.
- Skill: Analysis of a data set that illustrates the distinction between fundamental and realized niche.
- Skill: Use of a transect to correlate the distribution of plant or animal species with an abiotic variable.
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Theory of knowledge:
- Random samples are taken in studies involving large geographical areas or if limited time is available. Is random sampling a useful tool for scientists despite the potential for sampling bias?
Utilization:
- Syllabus and cross-curricular links:
- Geography
- Part 2C Extreme environments
Aims:
- Aim 6: Factors influencing herbivory could be investigated.
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