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11 Cards in this Set
- Front
- Back
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What is habitat assessment? |
HabitatAssessment measures the foliage coverage of trees above the banks of the creek;in other words, we measure the vegetation along the riparian corridor.
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What do you do in habitat assessment? |
youwill be going out with your group to one of the seven sites and takingmeasurements at each of the ten transectsan
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Transect |
A path that is parallel to thecreek, in which one counts and records the occurrences of the phenomena ofstudy, in this case trees and bushes. It is divided by transect lines.
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Transect Line |
Animaginary line extending from the markers across the channel and to thesurrounding bank area. It is perpendicular to the transect and the water flow.
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Transect Points |
Thereare seven sites for the Group 4 study at the Arcade Creek (A-G site). Each siteis broken down into eleven points
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Meter tape |
Metertapes are used to measure distances. If your measuring tape is not in meters,be sure to notate that on your data and make proper conversions. We have reeledmeter tapes that will be long enough for your purposes.
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Compass |
Thisis a small, square instrument that is used to determine magnetic north. Thisinstrument will be used to determine what degree the tree, or bush, is from thecenter of the quadrat. Starting at 0 degrees, the tree and bush number shouldincrease as the degree goes from 0 to 360.
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Calipers |
Thisis used to measure the diameter of the trees in each transect. Extend the armsof the caliper and adjust it to the size of the tree’s trunk 1 meter from theground. Trees with a diameter greater than 3.84 cm (that’s a circumference of11.9 cm) at 1 meter off the ground are considered “trees”, and those with adiameter less than 3.84 cm are considered “bushes”.
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flags |
13flags are used to mark the corners, midpoints, midpoints between the corners,and the center of the quadrat. eac-~0!
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Densiometer:
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A small, rectangular instrument witha gridded, concave mirror at its, the densiometer is used to measurecanopy/foliage coverage within the quadrats. When taking a reading, it shouldbe held elbow level and approximately 30 cm from the body while the number of mirrorsquares reflecting the canopy is counted. To count, each etched square must bedivided by 4, so that there are a total of 4 times as many squares on the faceof the densiometer. The final number of these smaller squares with canopycoverage must be divided by 0.96, and then divided by 100 in order to get thepercentage canopy cover of the area.
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Bush |
Ifthe diameter at 1 meter off the ground is greater than 0.038m, it is a tree. Ifsmaller, record it as a bush.
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