Option G: Ecology and conservation

C.1 Species and CommunitiesOption C: Ecology and conservation

UnderstandingsApplications/SkillsThe distribution of species is affected by limiting factors.Community structure can be strongly affected by keystone species.Each species plays a unique roll within a community because of the unique combinations of its special 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. A: Distribution of one animal and one plant species to illuminate limits of tolerance and zones of stress.A: Local examples to illustrate the range of ways in which species can interact within a community.A: The symbiotic relationship between zooxanthellae and reef building coral reef species. S: Analysis of data that illustrates the distinction between fundamental and realized niche. S: Use of a transect to correlate the distribution of plant and animal species with an abiotic variable.

Outline the factors that affect the distribution of plant species

Outline the factors that affect the distribution of animal species

Keystone SpeciesMay or may not be abundantExhibits control over structure of the communityRemoval has severe impacts on biodiversity in the area

Explain the niche concept

Species interactions

Species interactions

Species interactions

Species interactions

Species interactions

Species interactions

Fundamental and Realised Niches

Gauses experiments

Principle of Competitive Exclusion

Line transects

Line transects

HomeworkVocabOtherAbiotic, biotic, Shelfords law of tolerance, Keystone species, niche, spatial habitat, competition, principle of competitive exclusion, fundamental niche, realized niche, transectChallenge Yourself 5-8, pgs 650-651Exercises 1-3, pg 652Describe the distribution of one animal and one plant species. Explains how this would relate to their limits of tolerance and zones of stress.