Human Impact On Food Webs and Food Chains Part 1

Activity 1

  1. Using "Talking Chips" in a group of four, discuss the effects that destroying the food supply would have on the community living within the arena.
  2. Think- Pair-Share: Determine what emotions would you feel if you were to be sealed in an arena, you have no outside food or supplies.
  3. How would you grow everything you need and recycle your waste in order to survive.

Activity 2

FACT FILE

Visible Thinking - Connect

In 1991 – 1993 Eight people were sealed in a dome about the size of two football fields for a period of almost two years. They have no outside food or supplies. They must grow everything they need and recycle their waste in order to survive. They called it BIOSPHERE 2.

Visible Thinking - Extend

Individually Reflect

10 way how your daily activities impact the environment negatively and 10 ways it impacts the environment positively.

Visible Thinking - Wonder

Assess the statement below to explain how it is relevant to what you saw in "Biosphere 2" and "Hunger Games" videos.

The relationship among living things is complex, interconnected, and based on resource allocation. Changes in one resource level can impact others via a ripple effect.

Activity 3 - {PBL}

This project consists of:

  1. Project Brief
  2. Phase 1
  3. Phase 2
  4. Phase 3
  5. Phase 4

Project Brief (pairs)

Adapted from: Argument-Driven Inquiry in Life Science: Lab Investigations 11

Phase 1 - Research

  1. Define an ecosystem
  2. What is a producer?
  3. What is a consumer?
  4. How does a producer differ from a consumer?
  5. What are some of the possible consumers and producers found on Earth?
  6. What are some of the possible consumers and producers found in the Hunger Games?
  7. What are some of the possible consumers and producers found in Biosphere 2?
  8. What is a secondary consumer?
  9. What is a tertiary consumer?

Phase 2 - Understanding Food Chains & Webs

Different organisms have different energy needs, which will influence what food they eat. In any ecosystem, there can be multiple producers and consumers. One way scientists try to understand these relationships in an ecosystem is through designing food webs.

A food web is a diagram that models the feeding relationships in an ecosystem.

Reflecting: look at the image above and note 2 differences between food chains and webs.

A food web can also be considered the combination of all eating food chains present in an ecosystem.

Rule 1: A line coming out of an organism indicates it is being eaten.

Rule 2: An arrow going into an organism indicates it is doing the eating.

Important: one type of organism in the food web can be a food source for several other organisms.

Phase 3 - Collecting Data

1. Download the following link with information of all organisms, what they feed on and who feeds on them in the marsh ecosystem

2. Use the data in the "organism profile" to create a table that will help you analyse:

  • Who are the consumers?
  • Who are the producers?
  • Who are the primary, secondary and tertiary consumers? (are their more?)

Phase 4 - Presentation and Argumentation

Summarise your information into an "argument presentation board" like below.

Adapted from: Argument Driven Inquiry
ARGUMENTATION SESSION

Go around to 3 different groups and see which organism they chose! If their organism is different to your's ask them to present their evidence and argument for their choice.

Reflection: Do you need to go back and make changes? Justify your response.

CONCEPT CHECKPOINT

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