THE EFFECTS OF INTRASPECIFIC AND INTERSPECIFIC
THE EFFECTS OF INTRASPECIFIC AND INTERSPECIFIC
THE EFFECTS OF INTRASPECIFIC AND INTERSPECIFIC
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There is no such distinction between the stalk/shoot length of the wheat control and<br />
wheat grown at higher densities. The graph of the means is flat, and the confidence<br />
intervals are large. Shoot lengths were constant throughout the study of intraspecific<br />
competition.<br />
shoot length in cm<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
Wheat Intraspecific Competition: Shoot Length<br />
Means and 95% Confidence Intervals<br />
0<br />
control (2) 4 6 (act 1 5) 8 (act 6) 10 (act 8)<br />
act = # that actually<br />
germinated<br />
number of seeds per pot<br />
This trend of constant shoot length persisted in the interspecific study as well.<br />
Wheat stalk lengths did not vary very much when wheat was planted with peas. It can be<br />
seen that the means are very close in the summary table of statistics (Figure 2).<br />
Interspecific Competition: Wheat Stalk Lengths (cm)<br />
control (2 wheat) 1 wheat, 1 pea 3 wheat, 2 peas 5 wheat, 2 peas<br />
mean 17.11905 17.55 18.8 17.3<br />
std dev 2.11533 0.353553 3.325658 0.223607<br />
66% interval 15.00372 17.19645 15.47434 17.07639<br />
19.23438 17.90355 22.12566 17.52361<br />
95% interval 21.34971 16.84289 12.14868 16.85279<br />
12.88839 18.25711 25.45132 17.74721<br />
Figure 2<br />
Wheat root length, though, did decrease as pea density increased, but it was<br />
constant between the wheat control and the one wheat grown with one pea. There were<br />
6
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