Name:__________________________________ Grade & Sec.___________ Score:_________
Teacher:________________________________ Date: _________________ Rating:________
Activity 1
Index of Diversity
Objective:
Measure species distribution using mathematical way of expressing the amount of
biodiversity and species distribution in a community.
Materials:
Pen
Paper
Procedure:
1. This is an outdoor activity. Go to the area designated by your teacher.
2. Record the number of different species of trees present in the area. (It is not necessary to
know their names, just make sure that they differ by species.) Record this number in your
data table.
3. Go to the designated area again. This time, make a list of the trees by assigning
each a number as you walk by it.
4. Place an X under Tree 1 on your list. If tree 2 is the same species as Tree 1, mark another X
under Tree 1. Continue to mark an X under the trees as long as the species is the same as
the previous one.
5. When a different species is observed, mark an O under that tree on your list. Continue to
mark an O if the next tree is the same species as the previous. If the next tree is different,
mark an X.
6. Record in your data table:
a. The number of “runs”. Runs are represented by a group of similar symbols in a row.
Example –XXXXOOXO would be 4 runs (XXXX –1 run, OO – 1 run, X –1 run, O –1 run).
b. The total number of trees counted.
7. Calculate the Index of Diversity (I.D.) using the given formula:
Index of diversity = Number of species x number of runs
Number of trees