Populations

What the syllabus asks of you

• Describe a population as a group of organisms of one species, living in the same area, at the same time
• Describe a community as all of the populations of different species in an ecosystem
• Describe an ecosystem as a unit containing the community of organisms and their environment, interacting together
• Identify and state the factors affecting the rate of population growth for a population of an organism, limited to food supply, competition, predation and disease
• Identify the lag, exponential (log), stationary 7 Explain the factors that lead to each phase in and death phases in the sigmoid curve of the sigmoid curve of population growth, making population growth for a population growing in reference, where appropriate, to the role of an environment with limited resources limiting factors
• Interpret graphs and diagrams of population growth