Warming can increase soil respiration while reducing its fitted temperature sensitivity, but these results describe different comparisons. We examine which comparisons can be recovered from the Tropical Responses to Altered Climate Experiment in Puerto Rico. Using fourteen generalized least-squares coefficients, their marginal standard errors, and three annualized efflux increments, we calculate matched-condition treatment ratios, bound uncertainty over admissible coefficient covariances, and assess sensitivity to spatial weights. Shared moisture terms cancel from the treatment contrast. At \(24^\circ C\), warmed-to-ambient geometric-mean ratios are 1.066, 1.465, and 3.284 for the lower, middle, and upper plot pairs. The warmed-to-ambient \(Q_{10}\) ratio is 0.284 (conditional 95% normal-Wald interval: 0.170–0.472). In contrast, an interval for warmed \(Q_{10}\) lying wholly below unity requires a correlation below \(-0.747\) between the temperature and treatment–temperature coefficient estimates. Equal weighting of the annualized increments gives 32.63 \(\mathrm{Mg\,C\,ha^{-1}\,yr^{-1}}\), with 83.45% contributed by the upper pair; the lower–middle mean is 8.10 \(\mathrm{Mg\,C\,ha^{-1}\,yr^{-1}}\). The results establish a lower fitted thermal multiplier and strong concentration of additional efflux among the measured pairs. They do not identify physiological acclimation or a landscape carbon budget. Recovering the missing coefficient covariance and documenting environmental overlap and representative spatial weights would resolve distinct limits on interpretation.
