Increasing biomass in Amazonian forest plots
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 b...
| Autor principal: | Baker, Timothy R. |
|---|---|
| Outros Autores: | Phillips, Oliver L., Malhi, Yadvinder Singh, Almeida, Samuel Miranda, Arroyo, Luzmila P., Di Fiore, Anthony, Erwin, Terry L., Higuchi, Niro, Killeen, Timothy J., Laurance, Susan G.W., Laurance, William F., Lewis, Simon L., Monteagudo, Abel Lorenzo, Neill, David A., Núñez-Vargas, Percy, Pitman, Nigel C.A., Silva, José Natalino Macedo, Vásquez-Martínez, Rodolfo |
| Grau: | Trabalho Apresentado em Evento |
| Idioma: | English |
| Publicado em: |
Philosophical Transactions of the Royal Society B: Biological Sciences
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19986 |
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oai:repositorio:1-19986 |
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dspace |
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oai:repositorio:1-19986 Increasing biomass in Amazonian forest plots Baker, Timothy R. Phillips, Oliver L. Malhi, Yadvinder Singh Almeida, Samuel Miranda Arroyo, Luzmila P. Di Fiore, Anthony Erwin, Terry L. Higuchi, Niro Killeen, Timothy J. Laurance, Susan G.W. Laurance, William F. Lewis, Simon L. Monteagudo, Abel Lorenzo Neill, David A. Núñez-Vargas, Percy Pitman, Nigel C.A. Silva, José Natalino Macedo Vásquez-Martínez, Rodolfo Biomass Carbon Sink Old-growth Forest Tropical Forest Amazonia South America 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=104 m2), 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. 2020-06-16T17:29:11Z 2020-06-16T17:29:11Z 2004 Trabalho Apresentado em Evento https://repositorio.inpa.gov.br/handle/1/19986 10.1098/rstb.2003.1422 en Volume 359, Número 1443, Pags. 353-365 Restrito Philosophical Transactions of the Royal Society B: Biological Sciences |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Biomass Carbon Sink Old-growth Forest Tropical Forest Amazonia South America |
| spellingShingle |
Biomass Carbon Sink Old-growth Forest Tropical Forest Amazonia South America Baker, Timothy R. Increasing biomass in Amazonian forest plots |
| topic_facet |
Biomass Carbon Sink Old-growth Forest Tropical Forest Amazonia South America |
| description |
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=104 m2), 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. |
| format |
Trabalho Apresentado em Evento |
| author |
Baker, Timothy R. |
| author2 |
Phillips, Oliver L. Malhi, Yadvinder Singh Almeida, Samuel Miranda Arroyo, Luzmila P. Di Fiore, Anthony Erwin, Terry L. Higuchi, Niro Killeen, Timothy J. Laurance, Susan G.W. Laurance, William F. Lewis, Simon L. Monteagudo, Abel Lorenzo Neill, David A. Núñez-Vargas, Percy Pitman, Nigel C.A. Silva, José Natalino Macedo Vásquez-Martínez, Rodolfo |
| author2Str |
Phillips, Oliver L. Malhi, Yadvinder Singh Almeida, Samuel Miranda Arroyo, Luzmila P. Di Fiore, Anthony Erwin, Terry L. Higuchi, Niro Killeen, Timothy J. Laurance, Susan G.W. Laurance, William F. Lewis, Simon L. Monteagudo, Abel Lorenzo Neill, David A. Núñez-Vargas, Percy Pitman, Nigel C.A. Silva, José Natalino Macedo Vásquez-Martínez, Rodolfo |
| title |
Increasing biomass in Amazonian forest plots |
| title_short |
Increasing biomass in Amazonian forest plots |
| title_full |
Increasing biomass in Amazonian forest plots |
| title_fullStr |
Increasing biomass in Amazonian forest plots |
| title_full_unstemmed |
Increasing biomass in Amazonian forest plots |
| title_sort |
increasing biomass in amazonian forest plots |
| publisher |
Philosophical Transactions of the Royal Society B: Biological Sciences |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19986 |
| _version_ |
1787145106620416000 |
| score |
11.653393 |