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Annual fluxes of carbon from deforestation and regrowth in the Brazilian Amazon

Abstract

The distribution of sources and sinks of carbon among the world's ecosystems is uncertain. Some analyses show northern mid-latitude lands to be a large sink, whereas the tropics are a net source1; other analyses show the tropics to be nearly neutral, whereas northern mid-latitudes are a small sink2,3. Here we show that the annual flux of carbon from deforestation and abandonment of agricultural lands in the Brazilian Amazon was a source of about 0.2 Pg C yr-1 over the period 1989–1998 (1 Pg is 1015 g). This estimate is based on annual rates of deforestation and spatially detailed estimates of deforestation, regrowing forests and biomass. Logging may add another 5–10% to this estimate4, and fires may double the magnitude of the source in years following a drought4. The annual source of carbon from land-use change and fire approximately offsets the sink calculated for natural ecosystems in the region5,6. Thus this large area of tropical forest is nearly balanced with respect to carbon, but has an interannual variability of ± 0.2 PgC yr-1.

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Figure 1: Land cover in Brazilian Amazonia as of 1986, based on a classification of Landsat MSS data.
Figure 2: Comparison of two sets of estimates of the areas deforested by 1988 (106 ha) in each state of Brazilian Amazonia. ‘INPE’ indicates estimates from the Brazilian Space Agency, INPE.
Figure 3: The spatial distribution of biomass in Brazilian Amazonia.
Figure 4: Annual rate of deforestation and mean annual sources and sinks of carbon in Brazilian Amazonia.

References

  1. Ciais, P. et al. Partitioning of ocean and land uptake of CO2 as inferred by δ13C measurements from the NOAA Climate Monitoring and Diagnostics Laboratory global air sampling network. J. Geophys. Res. 100, 5051–5070 ( 1995).

    Article  ADS  CAS  Google Scholar 

  2. Keeling, R. F., Piper, S. C. & Heimann, M. Global and hemispheric CO2 sinks deduced from changes in atmospheric O2 concentration. Nature 381, 218–221 ( 1996).

    Article  ADS  CAS  Google Scholar 

  3. Rayner, P. J., Enting, I. G., Francey, R. J. & Langenfelds, R. Reconstructing the recent carbon cycle from atmospheric CO2, δ13C and O2/N2 observations. Tellus B 51, 213–232 ( 1999).

    Article  ADS  Google Scholar 

  4. Nepstad, D. C. et al. Large-scale impoverishment of Amazonian forests by logging and fire. Nature 398, 505– 508 (1999).

    Article  ADS  CAS  Google Scholar 

  5. Prentice, I. C. & Lloyd, J. C-quest in the Amazon Basin. Nature 396, 619– 620 (1998).

    Article  ADS  CAS  Google Scholar 

  6. Tian, H. et al. Effect of interannual climate variability on carbon storage in Amazonian ecosystems. Nature 396, 664– 667 (1998).

    Article  ADS  CAS  Google Scholar 

  7. Houghton, R. A. et al. The flux of carbon from terrestrial ecosystems to the atmosphere in 1980 due to changes in land use: geographic distribution of the global flux. Tellus B 39, 122– 139 (1987).

    Article  ADS  Google Scholar 

  8. Houghton, R. A. The annual net flux of carbon to the atmosphere from changes in land use 1850-1990. Tellus B 51, 298–313 (1999).

    Article  ADS  Google Scholar 

  9. Fisher, M. J. et al. Deep-rooted grasses store carbon in South American soils. Nature 371, 236–238 (1994).

    Article  ADS  Google Scholar 

  10. Davidson, E. A., Nepstad, D. C., Klink, C. & Trumbore, S. E. Pasture soils as a carbon sink. Nature 376, 472–473 (1995).

    Article  ADS  CAS  Google Scholar 

  11. Neill, C. et al. Forest- and pasture-derived carbon contributions to carbon stock and microbial respiration of tropical pasture soils. Oecologia 107, 113–119 ( 1996).

    Article  ADS  PubMed  Google Scholar 

  12. Fearnside, P. M. & Barbosa, R. I. Soil carbon changes from conversion of forest to pasture in Brazilian Amazonia. For. Ecol. Mgmt 108, 147–166 (1998).

    Article  Google Scholar 

  13. Fearnside, P. M. Human Carrying Capacity of the Brazilian Rainforest (Columbia Univ. Press, New York, 1986).

    Google Scholar 

  14. Nepstad, D. C., Uhl, C. & Serrao, E. A. S. Recuperation of a degraded Amazonian landscape: Forest recovery and agricultural restoration. Ambio 20, 248–255 (1991).

    Google Scholar 

  15. Moran, E., Brondizio, E., Mausel, P. & Wu, Y. Deforestation in Amazonia: land use change from ground and satellite level perspectives. BioScience 44, 329–338 (1994).

    Article  Google Scholar 

  16. Skole, D. L., Chomentowski, W. H., Salas, W. A. & Nobre, A. D. Physical and human dimensions of deforestation in Amazonia. BioScience 44, 314–321 ( 1994).

    Article  Google Scholar 

  17. Alves, D. S. & Skole, S. L. Characterizing land cover dynamics using multi-temporal imagery. Int. J. Remote Sensing 17, 835–839 (1996).

    Article  ADS  Google Scholar 

  18. Brazil, Ministério das Minas e Energia, Departamento Nacional de Produção Mineral (DNPM), Projeto RADAMBRASIL: 1973–1983, Levantamento de Recursos Naturais, Vols. 1–23, DNPM, Rio de Janeiro.

  19. Brown, S. & Lugo, A. E. Aboveground biomass estimates for tropical moist forests of the Brazilian Amazon. Interciencia 17, 8–18 (1992).

    CAS  Google Scholar 

  20. Brown, S., Gillespie, A. J. R. & Lugo, A. E. Biomass estimation methods for tropical forests with applications to forest inventory data. For. Sci. 35 , 881–902 (1989).

    Google Scholar 

  21. Cairns, M. A., Brown, S., Helmer, E. H. & Baumgardner, G. A. Root biomass allocation in the world's upland forests. Oecologia 111, 1–11 (1997).

    Article  ADS  PubMed  Google Scholar 

  22. Fearnside, P. M. Greenhouse gases from deforestation in Brazilian Amazonia: net committed emissions. Clim. Change 35, 321–360 (1997).

    Article  CAS  Google Scholar 

  23. Fearnside, P. M., Leal, N. & Fernandes, F. M. Rainforest burning and the global carbon budget: Biomass, combustion efficiency, and charcoal formation in the Brazilian Amazon. J. Geophys. Res. 98, 16733– 16743 (1993).

    Article  ADS  Google Scholar 

  24. Carvalho, J. A., Higuchi, N., Araujo, T. M. & Santos, J. C. Combustion completeness in a rainforest clearing experiment in Manaus, Brazil. J. Geophys. Res. 103, 13,195– 13,199 (1998).

    Article  ADS  CAS  Google Scholar 

  25. Delaney, M., Brown, S., Lugo, A. E., Torres-Lezama, A. & Bellow Quintero, N. The quantity and turnover of dead wood in permanent forest plots in six life zones of Venezuela. Biotropica 30, 2–11 (1998 ).

    Article  Google Scholar 

  26. Brown, S. & Lugo, A. E. Tropical secondary forests. J. Trop. Ecol. 6, 1–32 ( 1990).

    Article  Google Scholar 

  27. Hall, C. A. S. & Uhlig, J. Refining estimates of carbon released from tropical land-use change. Can. J. For. Res. 21, 118–131 ( 1991).

    Article  CAS  Google Scholar 

  28. Schroeder, P. E. & Winjum, J. K. Assessing Brazil's carbon budget: II. Biotic fluxes and net carbon balance. For. Ecol. Mgmt 75, 87–99 ( 1995).

    Article  Google Scholar 

  29. Fearnside, P. M. Forest biomass in Brazilian Amazonia: Comments on the estimate by Brown and Lugo. Interciencia 17, 19– 27 (1992).

    Google Scholar 

  30. Cochrane, M. A. et al. Positive feedbacks in the fire dynamic of closed canopy tropical forests. Science 284, 1832– 1835 (1999).

    Article  CAS  PubMed  Google Scholar 

Download references

Acknowledgements

We thank A. Janetos, D. Nepstad, C. Prentice and R. Birdsey for comments on earlier drafts of the paper. This work was supported by the Terrestrial Ecology Program, the Land Cover and Land Use Change Program, and the Landsat Program in the NASA Office of Earth Science.

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Correspondence to R. A. Houghton.

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Houghton, R., Skole, D., Nobre, C. et al. Annual fluxes of carbon from deforestation and regrowth in the Brazilian Amazon. Nature 403, 301–304 (2000). https://doi.org/10.1038/35002062

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