B2.4 Distribution of Organisms Flashcards
1
Q
What physical factors affect the distribution of organisms in an area?
A
Temperature Light Water Nutrients Oxygen and CO2
2
Q
How can a transect be used to gather information about the distribution of organisms?
A
A transect is a line placed across a habitat where the amount of organisms are recorded at regular intervals across
3
Q
What is a quadrat?
A
A square placed in a habitat where a reasonable amount of organisms can be counted
4
Q
What factors affect the accuracy, reliability, and reproducability of a quadrat?
A
- The quadrat must be placed randomly to take a representative sample
- The more quadrats placed and analysed, the better the data
5
Q
What is the sampling square used in fieldwork called?
A
A quadrat
6
Q
Why might less grass be growing underneath a tree?
A
There is less sunlight reaching the ground
