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Estimating Litter Decomposition Rate in Single-Pool Models Using Nonlinear Beta Regression

Figure 3

Simulation results for beta-distributed errors (option 2), k = 0.002.

(A) Percent bias, (B) percent relative error, and (C) average k estimate. Early, mid, late and end are early, mid, late and end stage decomposition simulations. The numbers 2, 5, 7 and 10 are the numbers of measurements used in each simulation. Blue circles = NLS, Red circles = Normal ML, gray/black circles = Beta ML. In most cases, nls = Normal ML so that the red circles cover the blue circles. In panel (A), the gray line shows 0% bias. In panel (C), the gray line shows the true k value, 0.002 d−1.

Figure 3