Aim
To study the plant population frequency by the quadrant method.
Materials Required
- Cotton/Nylon thread
- 4 nails
- Hammer
Procedure
- Select the site of study and make a quadrant of 1m*1m using the nails and the thread.
- Fix the nails with the help of a hammer without destroying the vegetation.
- Make nine similar quadrants at the site of study.
- The plant species for the study should be selected.
- Observe the species in the first quadrant and mark them as species A.
- Check the presence of species A in all the quadrants and record the observations in the table.
- Similarly, record the number of species B and C in all the quadrants and mention them in the table.
- Determine the frequency of plant population by the formula:
Percentage frequency= (No. of sampling units in which species occur)/(Total number of sampling units used in the study)*100
Observations
|
Plant Species |
Quadrants employed in the study |
No. of quadrants in which species are present (N) |
Percentage Frequency (F)=N/Q*100 |
|||||||||
|
I |
II |
III |
IV |
V |
VI |
VII |
VIII |
IX |
X |
|||
|
A |
P |
P |
P |
3 |
30% |
|||||||
|
B |
P |
P |
P |
P |
4 |
40% |
||||||
|
C |
P |
P |
P |
P |
P |
5 |
50% |
|||||
Conclusion
The plant population frequency is the highest in species C and the least in species A. It shows how many times a plant species is present in the provided number of sample quadrats.
Also Read: Classification of plants
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