Lectures on species interactions and competition

Fischer et al. (2002) Results
• Under high radiation conditions and warm
temperatures, growth and photosynthesis
were greater for kochia than wheat.
• Warm temperatures also increased dark
respiration and reduced water use
efficiency under low radiation conditions,
however, thus limiting kochia's
competitiveness under a closed canopy.
• Water stress did not affect competition.
Fig. 2 Relative yields and relative yield totals (RYT) (open
triangles) of wheat (solid circles) and kochia (solid triangles)
grown at 15/11 and 22/18°C day/night temperature regimes
in replacement-series experiments. Error bars represent ±
standard errors of the mean
(Fisher et al. 2000.)