Paper Topic:

Lab assignment

PLOT SAMPLING

1 . Raw data table

Species Diameters

Sample 1

Species 2 .93 1 .3

Species 5 .57

Species 6 1 .23 1 .89

Species 8 1 .66 1 .38 .53

Species 9 .76 2 .1

Sample 2

Species 1 1 .45 .67 .92 .43

Species 2 1 .58 .35

Species 4 .53

Species 5 .77 .43 .21

Species 6 .9

Species 7 .84 1 .4

Species 8 .55 2 .4

Species 9 1 .13 .45 .78 .67

Sample 3

Species

1 .32 .41 .33 1 .1

Species 4 .58 .83 .19

Species 6 .61 2 .21

Species 9 .96 1 .14

Sample 4

Species 2 3 .43 1 .6

Species 3 .45 .97

Species 5 .34 .88 .56

Species 6 1 .66

Species 8 .69 .54 1 .17

Sample 5

Species 1 1 .87 .54 .97

Species 2 .52 .32

Species 3 1 .64 .67 .79

Species 4 2 .6

Species 6 .51 .69 .72

Species 7 .89 1 .45 2 .3 .59

Species 9 .79 .67 1 .12

Most common species are : 1 , 2 , 6 , 8 , 9

2 . Density and frequency of the five most common species

Density Number of species / Sum of all plot areas

Frequency Number of plots which have at least 1 ind / plots

Sum of all plot areas 0 .1 CH 5 0 .5 m2

For species 1 : Density 10 / 0 .5 20

Frequency 3 / 5 0 .6

Species Number Number of plots Density Frequency

Species 1 10 3 20 .6

Species 2 8 4 16 .8

Species 6 9 5 18 1

Species 8 8 3 16 .6

Species 9 11 4 22 .8

3 . Relative densities and relative frequencies for the five most common species

Relative Density Density Relative Frequency Frequency For species 1 : RD 20 / 92 0 ,22

RF .6 / 3 .8 0 ,16

Species Relative Density Relative Frequency

Species 1 .22 .16

Species 2 .17 .21

Species 6 .2 .26

Species 8 .17 .16

Species 9 .24 .21 4 . Dominance of species 1

Dominance Area covered by a species / Sum of all plot areas

pecies (0 ,5 Diameter )2

Diameters 1 ,45 0 ,67 0 ,92 0 ,43 0 ,32 0 ,41 0 ,33 1 ,10 1 ,87 0 ,54 Basal area 4 ,55 2 ,10 2 ,89 1 ,35 1 ,00 1 ,29 1 ,04 3 ,45 5 ,87 1 ,70 28 ,29

For species 1 : Dominance 28 ,29 cm2 / 0 ,5 m2 56 ,58 cm2 /1m2

6 . The most abundant are species 9

In 1 hectare there are 10 ,000 m2 . So , if there are 11 individuals on 0 .5 m2 , then on 1 ha there are 11 CH (10000 / 0 .5 220000 individuals

7 . Values of density , dominance and frequency converted to relative values in order to simplify the obviousness of species ' values part in distribution and relative importance of each species in the community

8 . One of the advantages of measuring frequency is that there are fewer opportunities for observer bias due to inadequate or inconsistent...

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