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Name a sampling technique which is used to sample the abundance of ground plants and slow moving organisms.
Quadrats
Identify 1 possible source of errors when using quadrats.
1. Not enough samples taken 2. organisms are identified incorrectly 3. Organisms are wrongly counted.
Identify 1 way to reduce a possible source of errors when using a quadrat.
1.Throw a large number of quadrats to getmore reliable results. 2.Use a key to help identify organisms. 3.If the organisms are only partly in thequadrat have a rule for counting them.
Why would an individual use a pitfall trap?
To sample small ground dwelling animals
Identify 1 possible source of error in using a pitfall trap.
1.The top of the trap is not level with thesoil surface, organisms will not fall in. 2.Birds may eat trapped animals or theorganisms will eat each other. 3.Organism may die from drowning. 4.Flying organisms or spiders may be ableto get out.
Identify 1 possible method of reducing errors in using a pitfall trap.
1.Make sure the hole is deep enough for thetrap to be level with the soil surface. 2.Place a lid of leaves etc ontop of the trap for camouflage. 3.Make holes in the bottom to stop itfilling with water.
What would be used to measure light intensity?
Light meter
What would be used to measure moisture in the environment?
Moisture meter.
What instrument would be used to measure temperature?
Thermometer
Identify 1 possible error in using a light meter
1.You could be casting a shadow on themeter2. The light intensity can change because ofclouds. If you want to compare the lightat different places this can affect your results.
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