Name: __________________________________
Date: ________________________
Class: _______________
IB Environmental Systems and
Societies
2.1 Species and
populations
Significant ideas:
A species interacts with its abiotic and biotic environment, and its niche is described by
these interactions.
Populations change and respond to interactions with the environment.
All systems have a carrying capacity for a given species.
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Key vocabulary
1. Define the following:
Species
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Habitat
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Niche
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Abiotic factors
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Biotic factors
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Carrying capacity
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2. Distinguish between fundamental niche and realized niche.
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3. Explain why population growth slows when a population approaches its carrying capacity.
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Interactions
1. Define the following species interactions
Competition
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Predation
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Herbivory
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Parasitism
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Mutualism
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2. Distinguish between intra-and inter-specific competition.
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Population changes
1. Outline what is represented in S and J curves
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2. Draw a labeled S and J curve.:
S curve:
J curve:
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