Plant Competition Lab Data

Links to previous pages:

Intraspecific Competition

Here are the data from three groups. Note that the density is the number of plants harvested, not the number of plants that were supposed to be in the pot.

Use all of the data.
		Seeds	Plants	Total part weights for all plants in a pot (grams)
	Density	planted	harvested	Stem	Leaf	Bud
Group 1
	1	2	0
	2	4	2	1.12	0.78	0.25
	4	6	4	2.43	1.81	0.62
	8	12	7	3.97	2.13	0.33
	16	20	17	7.74	4.6	0.11
	32	38	32	13.11	9.26	0
	64	70	61	20.03	19.19	0
Group 2
	1	2	2	1.43	0.84	0.31
	2	4	3	2.07	0.78	0.62
	4	6	3	1.79	1.81	0.54
	8	12	9	4.2	2.13	0.37
	16	20	17	6.99	4.6	0
	32	38	34	14.15	9.26	0
	64	70	65	21.85	19.19	0
Group 3
	1	2	2	1.28	1.03	0.44
	2	4	4	2.52	1.57	0.89
	4	6	3	1.88	1.78	0.43
	8	12	8	4.22	2.73	0.25
	16	20	16	7.53	4.41	0
	32	38	32	12.49	9.11	0
	64	70	66	19.22	20.9	0

Here are stem lengths from the plants above. Note that not all stems were used. You will be plotting averages.

Stem Lengths versus plant density
For densities over 4, 4 stems were chosen randomly for this dataset
Density	Lengths (cm)

2	13.4	12.1
4	7.5	8.9	10.2	11
7	6.8	7.4	5.2	8.9
17	6.8	6.2	5.3	4.9
32	6.2	4.6	4.7	5
61	1.3	1.5	2.1	2.4
2	11.6	9.7
3	12.2	13.1	13.7
3	11	12.1	14.4
9	6.1	8.3	7.2	6.5
17	7.4	8.2	6.2	8.3
34	3.1	2.2	3.4	3
65	2.3	3.1	2.5	1.9
2	13.3	14.5
4	8.9	10.3	11.4	12.9
3	13.1	12.8	9.3
8	7.9	9.2	10.1	8.4
16	5.3	6.2	5.7	5.5
32	4.2	5.3	6.2	6.7
66	1.4	2.3	2.3	1

Interspecific competition

Note once again that you should use the actual number of plants in getting means and in the graphs, rather than the number of plants that were supposed to be there.

		Number of	Number of	Total (g)	Total (g)
		Marigold	Zinnia	Marigold	Zinnia
Group 1
	5M:5Z	6	8	9.46	13.8
	5M:50Z	4	46	5.02	56.76
	50M:5Z	52	5	42.13	4.28
	50M:50Z	41	38	29.06	27.19
Group 2
	5M:5Z	5	8	7.72	15.26
	5M:50Z	7	39	8.35	52.87
	50M:5Z	44	3	35.48	2.22
	50M:50Z	47	49	30.92	29.65
Group 3
	5M:5Z	7	7	9.3	12.83
	5M:50Z	5	45	5.71	57.98
	50M:5Z	51	7	39.78	4.66
	50M:50Z	51	46	28.48	23.42

Return to my Homepage

Go to my Research Page

TSU Biology Department

Go to TSU Homepage

Email me

Last modified March 26, 2002