Research methods
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What is a surber sample?
A more standardised technique than kick sampling
What does a plankton net do?
Catches planktonic organisms floating in water
What does a sweep net do?
Sample invertebrates in ground vegetation
What is a pitfall trap?
Sample populations of mobile animals on the ground
What is a beating tray used for?
Sample invertebrates on leaves
What are light traps used for?
Used to collect night flying insects that are attracted to bright lights, like moths
What is a tullgren funnel used for?
Sample invertebrates in leaf litter or the soil
What is a suction sampler used for?
Capture airborne insects
What measures humidity?
Calibrated whirling hygrometer
What measures light intensity?
Calibrated light meter
What measures wind velocity?
Calibrated electronic anemometer
What factors affect the rate of heat loss?
Thermal insulation Volume
How is sound measured?
Calibrated sound level meter
Describe features of spearmanns rank
Used to determine if one variable has an affect on another, relationships. The null is rejected if the calculated value is bigger than critical value
Describe features of T-test
Used to see a difference between two means in two areas, data is measured. Null is rejected if calculated value is bigger than the critical Degrees of freedom in (n1+n2)-2
Describe the features of Chi squared
Data is counted, used to compare frequencies. Null is rejected if calculated value is bigger than critical. Degrees of freedom is no of sites minus 1
Describe the features of mann u whitney
Data calculated or counted Used to find a difference between two medians Null is rejected if the calculated value is smaller than the critical value.