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  Increasing biomass in Amazonian forest plots

Baker, T. R., Phillips, O. L., Malhi, Y., Almeida, S., Arroyo, L., Di Fiore, A., et al. (2004). Increasing biomass in Amazonian forest plots. Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences, 359(1443), 353-365. doi:10.1098/rstb.2003.1422.

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BGC0691.pdf (Verlagsversion), 219KB
 
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 Urheber:
Baker, T. R.1, Autor           
Phillips, O. L., Autor
Malhi, Y., Autor
Almeida, S., Autor
Arroyo, L., Autor
Di Fiore, A., Autor
Erwin, T., Autor
Higuchi, N., Autor
Killeen, T. J., Autor
Laurance, S. G., Autor
Laurance, W. F., Autor
Lewis, S. L., Autor
Monteagudo, A., Autor
Neill, D. A., Autor
Vargas, P. N., Autor
Pitman, N. C. A., Autor
Silva, J. N. M., Autor
Martínez, R. V., Autor
Affiliations:
1Research Group Carbon-Change Atmosphere, Dr. J. Lloyd, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497762              

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Schlagwörter: Amazonia Biomass Carbon Permanent plot Tropical forests Tropical rain-forest Brazilian amazon Severe drought El-nino Tree Dynamics Impact Mortality
 Zusammenfassung: A previous study by Phillips et al. of changes in the biomass of permanent sample plots in Amazonian forests was used to infer the presence of a regional carbon sink. However, these results generated a vigorous debate about sampling and methodological issues. Therefore we present a new analysis of biomass change in old-growth Amazonian forest plots using updated inventory data. We find that across 59 sites, the above-ground dry biomass in trees that are more than 10 cm in diameter (AGB) has increased since plot establishment by 1.22 ± 0.43 Mg per hectare per year (ha(-1) yr(-1), where 1 ha = 10(4) m(2)), or 0.98 ± 0.38 Mg ha(-1) yr(-1) if individual plot values are weighted by the number of hectare years of monitoring. This significant increase is neither confounded by spatial or temporal variation in wood specific gravity, nor dependent on the allometric equation used to estimate AGB. The conclusion is also robust to uncertainty about diameter measurements for problematic trees: for 34 plots in western Amazon forests a significant increase in AGB is found even with a conservative assumption of zero growth for all trees where diameter measurements were made using optical methods and/or growth rates needed to be estimated following fieldwork. Overall, our results suggest a slightly greater rate of net stand-level change than was reported by Phillips et al. Considering the spatial and temporal scale of sampling and associated studies showing increases in forest growth and stem turnover, the results presented here suggest that the total biomass of these plots has on average increased and that there has been a regional-scale carbon sink in old-growth Amazonian forests during the previous two decades. [References: 42]

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 Datum: 2004
 Publikationsstatus: Erschienen
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 Identifikatoren: Anderer: BGC0691
DOI: 10.1098/rstb.2003.1422
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Titel: Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Royal Society
Seiten: - Band / Heft: 359 (1443) Artikelnummer: - Start- / Endseite: 353 - 365 Identifikator: ISSN: 0962-8436
CoNE: https://pure.mpg.de/cone/journals/resource/963017382021_1