BIOL 215 Lecture Notes - Lecture 21: Chlorophyll, Temperate Forest, Limiting Factor

• School: McGill University
• Department: Biology
• Course: BIOL 215
• Professor: Ehab Abouheif

Document Summary

Start with an amount of biomass, measure it: measure the loss (what"s eaten by herbivory/dead from drought, *used readily in grassland. Instead of weighting - use calometric bomb: when burned, measures the energy inside the plant, need to measure change in biomass through time. *difficult to measure the productivity with long living individuals (like trees) i. e. forests. (difficult due to scale of system/age of trees) Once you measure productivity - want to understand what happened to the biomass and what is causing gross productivity to be different from net productivity. To use the harvest method need good estimates of the amount the animals have consumed, during the growing season. Gpp = 500+125+200+150 (it"s everything -because all the factors are dependent on photosynthesis) Gross productivity - the energy they take up from the sun for photosynthesis. Here, gpp of the system is all of these things. *because we are assuming plant respiration is already included in biomass increase.