Competition :
Competition Plants are SESSILE which means that they depend on simple nutrients that are ‘delivered’ to them. COMPETITION in plants is for:
light
soil nutrients
Competition for light :
Competition for light COMPENSATION POINT is the light intensity at which the rate of photosynthesis is equal to the rate of respiration. It varies depending on the species
Is when the food made = food used.
Is when CO2 uptake = CO2 output COMPENSATION PERIOD is the time taken to reach the compensation point after being in darkness.
Shade Sun :
Shade Sun Has a lower compensation point
has a shorter compensation period
successful in shaded areas e.g. Forest floor
more efficient at photosynthesis in low light intensities. Has a higher compensation point
Has a longer compensation period
Requires higher light intensities to show a net energy gain.
Effect of Grazing :
Effect of Grazing No grazing Dominant species flourish at expensive of others few biodiversity.
Medium grazing strongest competitors are kept in check so other species can grow high biodiversity
High Intensity some species may be completely removed few biodiversity