GPP stuff

• Why is GPP lower than light energy available to the ecosystem?

  • Not all light falls on leaves
  • Some light reflected by surface of leaves
  • Some light not absorbed by leaves
  • Some light falls on leaf, but misses chloroplast
• Whats the equation for efficient energy transfer?

  Useful energy transferred/ total energy supplied times 100
• Whats the equation for GPP?

  NPP = GPP-R