Table 3 Mean ± standard deviation (g C m−2 y−1) and accumulated (g C m−2) seasonal and annual net ecosystem exchange (NEE), gross primary production (GPP), ecosystem respiration (Reco) and ecosystem carbon-use efficiency (NEP/GPP ratio) fin the study period.
From: Seasonal variation in net ecosystem CO2 exchange of a Brazilian seasonally dry tropical forest
Year | Variable | Statistics | Dry-wet transition | Wet season | Wet-dry transition | Dry season | Annual |
|---|---|---|---|---|---|---|---|
2014 | NEE | Mean | −0.50 ± (0.05) | −0.70 ± (0.33) | −0.25 ± (0.04) | −0.26 ± (0.03) | −0.46 ± (0.03) |
Sum | −45.9 | −84.0 | −14.9 | −24.2 | −169.0 | ||
GPP | Mean | −1.20 ± (0.08) | −1.68 ± (0.10) | −0.73 ± (0.06) | −0.64 ± (0.04) | −1.14 ± (0.06) | |
Sum | −110.6 | −200.8 | −44.3 | −59.0 | −414.7 | ||
Reco | Mean | 0.70 ± (0.04) | 0.98 ± (0.04) | 0.48 ± (0.03) | 0.39 ± (0.01) | 0.68 ± (0.03) | |
Sum | 64.7 | 117.0 | 29.4 | 34.7 | 246.0 | ||
NEP/GPP | Ratio | 0.41 | 0.42 | 0.34 | 0.41 | 0.41 | |
2015 | NEE | Mean | −0.28 ± (0.03) | −0.63 ± (0.07) | −0.30 ± (0.03) | −0.36 ± (0.01) | −0.40 ± (0.02) |
Sum | −17.9 | −56.0 | −27.1 | −44.0 | −145.0 | ||
GPP | Mean | −0.79 ± (0.03) | −1.43 ± (0.08) | 0.78 ± (0.04) | −0.71 ± (0.02) | −0.92 ± (0.04) | |
Sum | −49.0 | −127.0 | 72.0 | −86.0 | −334.0 | ||
Reco | Mean | 0.51 ± (0.02) | 0.80 ± (0.04) | 0.49 ± (0.02) | 0.34 ± (0.02) | 0.52 ± (0.02) | |
Sum | 30.9 | 71.3 | 44.8 | 42.0 | 189.0 | ||
NEP/GPP | Ratio | 0.36 | 0.44 | 0.38 | 0.51 | 0.43 |
