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Answer Sheet

Invasive Species

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Activity 1: Invasive Species and Biodiversity

Question 1.1
What can happen to native species when you introduce an exotic, or non-native, species?

Answer: It can wipe out local species. As a result, the species richness (or diversity) can be affected; it can decrease.

Question 1.2
Why is species diversity important?

Answer: Diversity is linked to resilience. Generally, the more diverse an environment, the better it can withstand environmental changes.

Activity 2: Exponential Population Growth

Question 2.1
List two ways that invasive species can out-compete native species.

Answer: Answers may include:

  • Invasive species may have fewer or no predators in their new environment.
  • Invasive species may have a greater capacity to reproduce than the native species.
  • Invasive species may be more adaptable to change in the environment than the native species.

Question 2.2
What happened to the number of zebra mussels in Ontario's Rideau River between 1993 and 1996?

Answer: The number of zebra mussels per square metre (density) increased from 24 to 400 000.

Activity 4: Research Report

Question 4.1
Complete the Connecting Questions Template.

Answer: The following is an example of a completed Connecting Questions Template.

© Canadian Museum of Nature

Close.

Questions 4.2 and 4.3
Possible Rubric Categories and Levels

Content
The topic is extensively covered with explicit reference to details and examples. The subject knowledge is thorough and well supported.

Essential knowledge is included about the topic and is accompanied by relevant details and examples. The subject knowledge is extensive but may not be well supported.

Essential information is included about the topic with some reference made to relevant details and/or examples. The response may contain minor errors or omissions.

The response lacks necessary factual information and support of details. Relevant examples of aspects may be identified, but they are not connected and may not be relevant to the topic.

Sources
A wide range of sources of information were consulted. Suitable material was selected to support the response. Sources of information were appropriately referenced.

Multiple sources of information were consulted. Suitable material was selected that supports the response. Sources of information were appropriately referenced.

At least three sources of information were consulted. The response demonstrates that an attempt was made to identify suitable material that supports the response. Sources of information were acknowledged.

Fewer than three sources of information were consulted. The response demonstrates a poor attempt to select suitable supporting material. Sources of information may not be acknowledged.

Analysis
The arguments were well thought out and demonstrate insightful analysis and synthesis of the information. The conclusion effectively summarizes the findings.

The arguments were well thought out and demonstrate well-considered analysis and synthesis of the information. The conclusion summarizes the findings with considerable effectiveness.

The arguments demonstrate a logical analysis and synthesis of the information. The conclusion summarizes the findings with reasonable effectiveness.

The arguments demonstrate a reasonable analysis and synthesis of the information. The conclusion summarizes the findings with limited effectiveness.

Presentation
The paper contains appropriate vocabulary. Ideas and information are expressed with a high degree of effectiveness. No errors in spelling or grammar are present.

The paper contains mostly appropriate vocabulary. Ideas and information are expressed with a considerable degree of effectiveness. No major errors in spelling or grammar are present.

The paper contains some appropriate vocabulary. Ideas and information are expressed with some effectiveness. Occasional errors in spelling or grammar are present.

The paper does not contain appropriate vocabulary. Ideas and information are expressed with limited effectiveness. Numerous errors in spelling or grammar are present.