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TA predator prey..notebook

1 March 14, 2016

Feb 29­12:58

Predator and prey relationships over time. 

We are learning:

Terminology for organisms in an environment Feeding relationships between predator and prey How to interpret Sigmoid graphs

Definitions for each graph phase Lotka ­ Volterra rules.

Jun 18­07:43

`

On your sheet complete the graph using a pencil ONLY

Jun 18­07:43

`

Label each section of the graph with the correct phase. 

1 lag phase: slow population growth because smaller number of individuals  reproducing [also adaptation to new environment]

2 exponential phase: quickest population growth due to increasing numbers of  individuals reproducing

3 stationary phase: population growth slows due to several factors (e.g. sinking  availability of nutrients and space as well as an excess of waste products) 4 death phase: due to above factors death rate surpasses the birth rate (usually  only in lab environments)

Feb 29­13:23

Pg 218 GCSE

Task. 

Write down the definitions of the key terms you can find (218 ­ 224) Worksheets predator prey relationships. 

Jun 18­07:44

Using a pencil, hypothesise on the shape of the graph if the natural predator is in  the environment. 

Check the shape is correct using pg 229. What can you say about the increase in  population of the predator compared to the prey?

Jun 18­08:48

Worksheet 2. Fill in the answers. 

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TA predator prey..notebook

2 March 14, 2016

Jun 18­08:48

Growth

Decline

Periodically Maxima Minima

Predator  Prey

Shifted

Average Stays  the same

Outside effect (e.g. natural disasters, diseases, human interaction affect the populations

If more than 2 species are part of the predator prey relationship

Jun 18­08:51

second side of worksheet 2

Jun 18­08:51

poisons, disease, natural disasters, 

 destruction of habitat prey

the food availability for the  prey is very high while availability for the predator only rises over time. 

Food chains and energy work sheet and questions on both sides ­ finish for  homework.  

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