## 3 Results
### General R\({}_{\rm s}\) Patterns  
R\({}_{\rm s}\) was higher in the growing season and lower in the cooler, dormant months across all vegetation types. No strong patterns between vegetation types were evident. However, April, August, and December had R\({}_{\rm s}\) values that differed significantly between two or more of the vegetation types. R\({}_{\rm s}\) was highest in the cinnamon fern plots during the warmer months. Hemlock plots had higher rates in the cooler months (Figure 1). R\({}_{\rm s}\) in our data did not meet the assumptions of normality; therefore, a natural logarithmic transformation was used on R\({}_{\rm s}\). The model also showed unequal variance. The square \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Vegetation Type**} & \multicolumn{2}{c}{**R\({}_{\rm s}\)**} & **Soil Temperature at** & **Soil Moisture at** \\  & **(\(\mu\)mol CO\({}_{2}\) m\({}^{-2}\) s\({}^{-1}\))** & **12 cm (\({}^{\circ}\)C)** & **0 to 11 cm** \\ \hline Hemlock & 2.29 \(\pm\) 0.28 & 10.5 \(\pm\) 0.87 & 33.8 \(\pm\) 0.83 B [FOOTNOTE:]Footnote : A different letter signifies a significant difference (\(p\) < 0.05) between vegetation types using [PERSON]’s HSD Post Hoc test.[ENDFOOTNOTE]** \\ Cinnamon Fern & 3.02 \(\pm\) 0.34 & 11.0 \(\pm\) 0.92 & 36.5 \(\pm\) 0.63 A \\ Mountain Laurel & 2.72 \(\pm\) 0.27 & 11.0 \(\pm\) 0.95 & 33.3 \(\pm\) 0.59 B \\ Hardwood & 2.63 \(\pm\) 0.27 & 11.1 \(\pm\) 0.95 & 33.3 \(\pm\) 0.58 B \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Average soil respiration (R\({}_{\rm s}\)), average soil temperature (12 cm), and average soil moisture (0 to 11 cm) and standard errors across all the sampling dates for hardwood, cinnamon fern, hemlock, and mountain Laurel vegetation types. Figure 1: Average soil respiration (R\({}_{\rm s}\)) for all sampling dates for hardwood, cinnamon fern, hemlock, and mountain Laurel vegetation types. A different letter signifies a significant difference (\(p\) < 0.05) between vegetation types for that sampling date. root of soil temperature and the natural log of soil moisture provided the best resolution for this. Soil temperature alone explained 81% of the variation observed. R\({}_{\rm s}\) was best explained by a model that included soil moisture and soil temperature (R\({}^{2}\) = 0.87) (Table 2). There was no significant interaction between soil temperature and soil moisture. Standard characterizations, such as basal area, volume, and trees per ha, as well as soil chemical properties (e.g., nutrients, pH, and organic matter content), did not add any significance to our model. When comparing the parameter estimates of our vegetation-type specific models, we found significant differences (Table 3). Holding certain parameters to an average for the growing season allowed us to examine how each of the vegetation type models responded to soil temperature (Figure 2) and soil moisture (Figure 3) separately. The soil moisture slope is significantly more negative for the cinnamon fern plots than the hemlock or mountain laurel plots. For every unit increase in soil moisture, the cinnamon fern plots' R\({}_{\rm s}\) lower at a faster rate than both the hemlock and mountain laurel R\({}_{\rm s}\) rates. The intercept in the cinnamon fern model was significantly higher than the mountain laurel model's intercept. The soil temperature slope values did not significantly differ between the vegetation types' models (Figure 2). \begin{table}
\begin{tabular}{c c c c c c} \hline
**Model** & **Intercept** & **A** & **B** & **RMSE** & **R\({}^{2}\)** & **R\({}^{2}\)** & **Adjusted** \\ \hline General & \(-0.0741\) & \(0.8209\) & \(-0.5011\) & \(0.32\) & \(0.86\) & \(0.86\) \\ Hardwood & \(3.2047\) & \(0.7359\) & \(-1.386\) & \(0.34\) & \(0.85\) & \(0.85\) \\ Cinnamon Fern & \(3.1809\) & \(0.8637\) & \(-1.437\) & \(0.31\) & \(0.90\) & \(0.89\) \\ Hemlock & \(-0.7283\) & \(0.8221\) & \(-0.2858\) & \(0.30\) & \(0.87\) & \(0.86\) \\ Mountain Laurel & \(-3.1951\) & \(0.8316\) & \(0.3678\) & \(0.30\) & \(0.88\) & \(0.88\) \\ \hline \end{tabular}
\end{table}