Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia: Early results

Michael Keller, Ane Alencar, Gregory P. Asner, Bobby Braswell, Mercedes Bustamante, Eric Davidson, Ted Feldpausch, Erick Fernandes, Michael Goulden, Pavel Kabat, Bart Kruijt, Flavio Luizão, Scott Miller, Daniel Markewitz, Antonio D. Nobre, Carlos A. Nobre, Nicolau Priante Filho, Humberto Da Rocha, Pedro Silva Dias, Celso Von RandowGeorge L. Vourlitis

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

The Large-scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is a multinational, interdisciplinary research program led by Brazil. Ecological studies in LBA focus on how tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in the Amazon region. Early results from ecological studies within LBA emphasize the variability within the vast Amazon region and the profound effects that land-use and land-cover changes are having on that landscape. The predominant land cover of the Amazon region is evergreen forest; nonetheless, LBA studies have observed strong seasonal patterns in gross primary production, ecosystem respiration, and net ecosystem exchange, as well as phenology and tree growth. The seasonal patterns vary spatially and interannually and evidence suggests that these patterns are driven not only by variations in weather but also by innate biological rhythms of the forest species. Rapid rates of deforestation have marked the forests of the Amazon region over the past three decades. Evidence from ground-based surveys and remote sensing show that substantial areas of forest are being degraded by logging activities and through the collapse of forest edges. Because forest edges and logged forests are susceptible to fire, positive feedback cycles of forest degradation may be initiated by land-use-change events. LBA studies indicate that cleared lands in the Amazon, once released from cultivation or pasture usage, regenerate biomass rapidly. However, the pace of biomass accumulation is dependent upon past land use and the depletion of nutrients by unsustainable land-management practices. The challenge for ongoing research within LBA is to integrate the recognition of diverse patterns and processes into general models for prediction of regional ecosystem function.

Original languageEnglish (US)
Pages (from-to)S3-S16
JournalEcological Applications
Volume14
Issue number4 SUPPL.
StatePublished - Aug 1 2004
Externally publishedYes

Fingerprint

biosphere
atmosphere
forest edge
land use
experiment
land cover
biological rhythm
selective logging
net ecosystem exchange
nutrient dynamics
evergreen forest
biomass
regrowth
ecosystem function
trace gas
land management
carbon sequestration
research program
phenology
tropical forest

Keywords

  • Amazon
  • Carbon
  • Cerrado
  • Land-use and land-cover change
  • LBA
  • Nutrients
  • Oxisol
  • Savanna
  • Trace gases
  • Tropical forest
  • Ultisol

ASJC Scopus subject areas

  • Ecology

Cite this

Keller, M., Alencar, A., Asner, G. P., Braswell, B., Bustamante, M., Davidson, E., ... Vourlitis, G. L. (2004). Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia: Early results. Ecological Applications, 14(4 SUPPL.), S3-S16.

Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia : Early results. / Keller, Michael; Alencar, Ane; Asner, Gregory P.; Braswell, Bobby; Bustamante, Mercedes; Davidson, Eric; Feldpausch, Ted; Fernandes, Erick; Goulden, Michael; Kabat, Pavel; Kruijt, Bart; Luizão, Flavio; Miller, Scott; Markewitz, Daniel; Nobre, Antonio D.; Nobre, Carlos A.; Priante Filho, Nicolau; Da Rocha, Humberto; Dias, Pedro Silva; Von Randow, Celso; Vourlitis, George L.

In: Ecological Applications, Vol. 14, No. 4 SUPPL., 01.08.2004, p. S3-S16.

Research output: Contribution to journalArticle

Keller, M, Alencar, A, Asner, GP, Braswell, B, Bustamante, M, Davidson, E, Feldpausch, T, Fernandes, E, Goulden, M, Kabat, P, Kruijt, B, Luizão, F, Miller, S, Markewitz, D, Nobre, AD, Nobre, CA, Priante Filho, N, Da Rocha, H, Dias, PS, Von Randow, C & Vourlitis, GL 2004, 'Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia: Early results', Ecological Applications, vol. 14, no. 4 SUPPL., pp. S3-S16.
Keller M, Alencar A, Asner GP, Braswell B, Bustamante M, Davidson E et al. Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia: Early results. Ecological Applications. 2004 Aug 1;14(4 SUPPL.):S3-S16.
Keller, Michael ; Alencar, Ane ; Asner, Gregory P. ; Braswell, Bobby ; Bustamante, Mercedes ; Davidson, Eric ; Feldpausch, Ted ; Fernandes, Erick ; Goulden, Michael ; Kabat, Pavel ; Kruijt, Bart ; Luizão, Flavio ; Miller, Scott ; Markewitz, Daniel ; Nobre, Antonio D. ; Nobre, Carlos A. ; Priante Filho, Nicolau ; Da Rocha, Humberto ; Dias, Pedro Silva ; Von Randow, Celso ; Vourlitis, George L. / Ecological research in the Large-scale Biosphere-Atmosphere Experiment in Amazonia : Early results. In: Ecological Applications. 2004 ; Vol. 14, No. 4 SUPPL. pp. S3-S16.
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