Productivity measures energy flow in an ecosystem; NPP = GPP - energy used in respiration.
Productivity in an ecosystem refers to the rate of biomass production by producers through photosynthesis. It includes:
Find the values of \( x, y, z \) if the matrix \( A \) satisfies the equation \( A^T A = I \), where
\[ A = \begin{bmatrix} 0 & 2y & z \\ x & y & -z \\ x & -y & z \end{bmatrix} \]