Estimate the # of objects in each jar

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Presentation transcript:

Estimate the # of objects in each jar

How can we determine the abundance of organisms in a population?

#5: Quadrats & Transects Tools that allow us to quantify the relative abundance of organisms Why do we care?

*Placement should be random! Quadrats A series of squares of a set size are placed in a habitat of interest and the species within those quadrats are identified and recorded. *Placement should be random!

Transect Lines A single line stretched over the area you want to study The line must have regular measurements marked off like a tape measure It is held straight & stationary.

Your Task: To set up and learn to use a transect line and quadrat To record the number of each “species” of fish that you see in a given area.

Go Forth & Sample!

Discussion Questions Why did different groups get different estimates? What errors could have occurred? What kinds of populations would scientists need to estimate rather than actually count? Why do you have to pay attention to where you are at all times?