Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon

Dan Metcalfe; P. Meir; L. E. O. C. Aragao; R. Lobo-do-Vale; D. Galbraith; R. A. Fisher; M. M. Chaves; J. P. Maroco; A. C. L. da Costa; S. S. de Almeida; A. P. Braga; P. H. L. Goncalves; J. de Athaydes; M. da Costa; T. T. B. Portela; A. A. R. de Oliveira; Y. Malhi; M. Williams

doi:10.1111/j.1469-8137.2010.03319.x

Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon

Dan Metcalfe, P. Meir, L. E. O. C. Aragao, R. Lobo-do-Vale, D. Galbraith, R. A. Fisher, M. M. Chaves, J. P. Maroco, A. C. L. da Costa, S. S. de Almeida, A. P. Braga, P. H. L. Goncalves, J. de Athaydes, M. da Costa, T. T. B. Portela, A. A. R. de Oliveira, Y. Malhi, M. Williams

University of Oxford

Research output: Contribution to journal › Article › peer-review

Abstract

P>The effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. Total ecosystem respiration (R-eco) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (R-auto)), were elevated on the TFE plot relative to the control. The increase in PCE and R-eco was mainly caused by a rise in R-auto from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 +/- 1.4 t C ha-1 yr-1 lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 +/- 0.04) than in the control (0.32 +/- 0.04). Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage.

Original language	English
Pages (from-to)	608-621
Journal	New Phytologist
Volume	187
Issue number	3
DOIs	https://doi.org/10.1111/j.1469-8137.2010.03319.x
Publication status	Published - 2010
Externally published	Yes

Subject classification (UKÄ)

Physical Geography

Free keywords

Amazon rain forest
carbon cycling
carbon dioxide
carbon use
efficiency
drought
gross primary productivity
net primary
productivity
partitioning

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10.1111/j.1469-8137.2010.03319.x

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Metcalfe, D., Meir, P., Aragao, L. E. O. C., Lobo-do-Vale, R., Galbraith, D., Fisher, R. A., Chaves, M. M., Maroco, J. P., da Costa, A. C. L., de Almeida, S. S., Braga, A. P., Goncalves, P. H. L., de Athaydes, J., da Costa, M., Portela, T. T. B., de Oliveira, A. A. R., Malhi, Y., & Williams, M. (2010). Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon. New Phytologist, 187(3), 608-621. https://doi.org/10.1111/j.1469-8137.2010.03319.x

@article{47cd36575c94435e8592cfa68785a978,

title = "Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon",

abstract = "P>The effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. Total ecosystem respiration (R-eco) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (R-auto)), were elevated on the TFE plot relative to the control. The increase in PCE and R-eco was mainly caused by a rise in R-auto from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 +/- 1.4 t C ha-1 yr-1 lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 +/- 0.04) than in the control (0.32 +/- 0.04). Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage.",

keywords = "Amazon rain forest, carbon cycling, carbon dioxide, carbon use, efficiency, drought, gross primary productivity, net primary, productivity, partitioning",

author = "Dan Metcalfe and P. Meir and Aragao, {L. E. O. C.} and R. Lobo-do-Vale and D. Galbraith and Fisher, {R. A.} and Chaves, {M. M.} and Maroco, {J. P.} and {da Costa}, {A. C. L.} and {de Almeida}, {S. S.} and Braga, {A. P.} and Goncalves, {P. H. L.} and {de Athaydes}, J. and {da Costa}, M. and Portela, {T. T. B.} and {de Oliveira}, {A. A. R.} and Y. Malhi and M. Williams",

year = "2010",

doi = "10.1111/j.1469-8137.2010.03319.x",

language = "English",

volume = "187",

pages = "608--621",

journal = "New Phytologist",

issn = "1469-8137",

publisher = "Wiley-Blackwell",

number = "3",

}

Metcalfe, D, Meir, P, Aragao, LEOC, Lobo-do-Vale, R, Galbraith, D, Fisher, RA, Chaves, MM, Maroco, JP, da Costa, ACL, de Almeida, SS, Braga, AP, Goncalves, PHL, de Athaydes, J, da Costa, M, Portela, TTB, de Oliveira, AAR, Malhi, Y & Williams, M 2010, 'Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon', New Phytologist, vol. 187, no. 3, pp. 608-621. https://doi.org/10.1111/j.1469-8137.2010.03319.x

TY - JOUR

T1 - Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon

AU - Metcalfe, Dan

AU - Meir, P.

AU - Aragao, L. E. O. C.

AU - Lobo-do-Vale, R.

AU - Galbraith, D.

AU - Fisher, R. A.

AU - Chaves, M. M.

AU - Maroco, J. P.

AU - da Costa, A. C. L.

AU - de Almeida, S. S.

AU - Braga, A. P.

AU - Goncalves, P. H. L.

AU - de Athaydes, J.

AU - da Costa, M.

AU - Portela, T. T. B.

AU - de Oliveira, A. A. R.

AU - Malhi, Y.

AU - Williams, M.

PY - 2010

Y1 - 2010

N2 - P>The effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. Total ecosystem respiration (R-eco) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (R-auto)), were elevated on the TFE plot relative to the control. The increase in PCE and R-eco was mainly caused by a rise in R-auto from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 +/- 1.4 t C ha-1 yr-1 lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 +/- 0.04) than in the control (0.32 +/- 0.04). Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage.

AB - P>The effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. Total ecosystem respiration (R-eco) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (R-auto)), were elevated on the TFE plot relative to the control. The increase in PCE and R-eco was mainly caused by a rise in R-auto from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 +/- 1.4 t C ha-1 yr-1 lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 +/- 0.04) than in the control (0.32 +/- 0.04). Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage.

KW - Amazon rain forest

KW - carbon cycling

KW - carbon dioxide

KW - carbon use

KW - efficiency

KW - drought

KW - gross primary productivity

KW - net primary

KW - productivity

KW - partitioning

U2 - 10.1111/j.1469-8137.2010.03319.x

DO - 10.1111/j.1469-8137.2010.03319.x

M3 - Article

C2 - 20553394

SN - 1469-8137

VL - 187

SP - 608

EP - 621

JO - New Phytologist

JF - New Phytologist

IS - 3

ER -

Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon

Abstract

Subject classification (UKÄ)

Free keywords

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