Comprehensive assessment of carbon cycling in Amazonian forest stands Yadvinder Malhi Luiz Aragao, Cecile Girardin, Dam Metcalfe, Javier Silva Espejo, Antonio Lola da Costa, Samuel Almeida....

Malhi et al (2004), The above-ground coarse wood productivity of 104 Neotropical forest plots, Global Change Biology Above-ground wood productivity

Photosynthesis 100% Wood respiration Leaf production Above-ground biomass production Below-ground biomass production Fine-root production The Carbon Allocation of Tropical Forests Leaf respiration Root respiration Volatile production Dissolved organic matter Autotrophic respiration Net primary production

GPP = 30.4 Manaus R leaf = 10.0±4.0 R stem = 4.2±1.0 R CWD = 2.5±0.3 R Total = 29.3±4.7 R Aut = 19.8±4.6 R Het = 9.6±1.2 NPP Total = 10.1±1.4 NPP Ag = 7.3±1.3 NPP Bg = 2.8±0.7 F doc = 0.19±0.07 D Fine litterfall = 3.6±0.7 D CWD = 3.58±1.0 R roots = 5.6±2.0 Predicted R soil = 12.6±2.3 Measured R soil = 12.1±1.7 D Root = 2.8±0.7 R soil het. = 7.1±1.1 NPP coarse roots = 0.8±0.2 NPP fine roots = 2.1±0.7 NPP stem = 2.58±0.06 NPP VOC = 0.13±0.06 NPP leaves,flowers,fruit = 3.6±0.7 NPP branch turnover = 1.0±1.0

Some Results

Manaus Tapajos Caxiuana Tambopata

Components of net primary productivity, N p Malhi et al., Global Change Biology, in press

Components of net primary productivity, N p Malhi et al., Global Change Biology, in press

Aragao et al., in prep

GPP = 30.4 Manaus R leaf = 10.0±4.0 R stem = 4.2±1.0 R CWD = 2.5±0.3 R Total = 29.3±4.7 R Aut = 19.8±4.6 R Het = 9.6±1.2 NPP Total = 10.1±1.4 NPP Ag = 7.3±1.3 NPP Bg = 2.8±0.7 F doc = 0.19±0.07 D Fine litterfall = 3.6±0.7 D CWD = 3.58±1.0 R roots = 5.6±2.0 Predicted R soil = 12.6±2.3 Measured R soil = 12.1±1.7 D Root = 2.8±0.7 R soil het. = 7.1±1.1 NPP coarse roots = 0.8±0.2 NPP fine roots = 2.1±0.7 NPP stem = 2.58±0.06 NPP VOC = 0.13±0.06 NPP leaves,flowers,fruit = 3.6±0.7 NPP branch turnover = 1.0±1.0

Contributing terms to soil respiration

Comparison against direct soil respiration measurements

GPP = 30.4 Manaus R leaf = 10.0±4.0 R stem = 4.2±1.0 R CWD = 2.5±0.3 R Total = 29.3±4.7 R Aut = 19.8±4.6 R Het = 9.6±1.2 NPP Total = 10.1±1.4 NPP Ag = 7.3±1.3 NPP Bg = 2.8±0.7 F doc = 0.19±0.07 D Fine litterfall = 3.6±0.7 D CWD = 3.58±1.0 R roots = 5.6±2.0 Predicted R soil = 12.6±2.3 Measured R soil = 12.1±1.7 D Root = 2.8±0.7 R soil het. = 7.1±1.1 NPP coarse roots = 0.8±0.2 NPP fine roots = 2.1±0.7 NPP stem = 2.58±0.06 NPP VOC = 0.13±0.06 NPP leaves,flowers,fruit = 3.6±0.7 NPP branch turnover = 1.0±1.0

Components of plant respiration

G p = N p + R autotrophic Bottom-up estimations of gross primary production, G p

CO 2 Flux Time of day Gross Primary Production Ecosystem Respiration Net Ecosystem Exchange Top-down estimations of gross primary production, G p

Calculation of gross primary production and comparison with flux towers

CUE = N p / G p = N p / (G p + R autotrophic ) Estimations of carbon use efficiency, CUE

Carbon use efficiencies

Malhi et al (2004), The above-ground coarse wood productivity of 104 Neotropical forest plots, Global Change Biology Above-ground wood productivity

3450m 3250m 3000m 2750m 2500m 2000m 2250m 1750m Trocha Union, Kosnipata Ridge, Manu Peru Andes Biodiversity and Ecosystem Research Group: m 1250m 1000m 200m

8.5 o C 9.2 o C 10.5 o C 11.9 o C 13.3 o C 15.3 o C 14.8 o C 16.7 o C Trocha Union, Kosnipata Ridge, Manu Peru Andes Biodiversity and Ecosystem Research Group: 19 o C 21 o C 22.1 o C 26.4 o C

Trocha Union (3000 m elevation), Peru

San Pedro (1500 m elevation), Peru

NPP Variation with Elevation

GPP Variation with Elevation