Solution Guide for Calculating GPP and NPP in Mini Lab

First, gather all the necessary data for each site, including light and dark bottle measurements. The light bottle helps measure total photosynthetic activity, while the dark bottle accounts for respiration alone. The difference between these values gives you the net productivity.

Next, determine the total energy captured in the ecosystem by focusing on the rate of energy input from the sun. This step will involve calculating the gross primary productivity, which represents the total energy plants convert into biomass through photosynthesis.

Finally, subtract the amount of energy used in cellular respiration from the total gross productivity to find the net rate of energy available to other organisms in the system. This final value is a key indicator of the ecosystem’s overall efficiency in supporting life.