11.3 Sampling Techniques Flashcards
(18 cards)
List the techniques used to sample invertebrates/insects
- Pooter
- Sweep nets
- Pitfall traps
- Tree beating
- Kick sampling
How is a pooter used?
- By sucking on a mouthpiece, insects are drawn into teh holding chamber via suction
- Filter before the mouthpiece prevents insects from entering the mouth
How is a sweep net used?
Catches insects in areas of long grass
How is a pitfall trap used?
- Hole is dug in ground, insects fall into it
- Hole is protected by roof structure to prevent flooding
What is tree beating?
- Large white cloth is stretched under tree
- Tree is shaken to dislodge vertebrates
- Insects are collected in white cloth
What are the two types of quadrat?
Point quadrat, frame quadrat
What is a point quadrat?
A frame containing a horizontal bar
How is a point quadrat used?
At set intervals, long pins can be pushed through the bar to reach the ground. Each species of plant that the pin touches is recorded
How is a frame quadrat used?
Type and number of each species within each section is recorded
What is a frame quadrat?
A square frame divided into a grid of equal sections
Why can it be difficult to accurately determine an animal species’ population?
Because animals are constantly moving through their habitat
What are abiotic factors that can be recorded?
- Wind speed
- Light intensity
- Relative humidity
- pH
- Temperature
- Oxygen content in water
What can wind speed be measured using?
Anemometer
What can light intensity be measured using?
Light meter
What can relative humidity be measured using?
Humidity sensor
What can pH be measured using?
pH probe
What can temperature be measured using?
Temperature probe
What can oxygen content in water be measured using?
Dissolved oxygen probe
