Data/hora: 06/06/2024 04:24:04

Biblioteca(s): | Embrapa Amazônia Oriental.
Data corrente: | 26/07/2023
Data da última atualização: | 26/07/2023
Autoria: | VEDOVATO, L. B.; CARVALHO, L. C. S.; ARAGÃO, L. E. O. C.; BIRD, M.; PHILLIPS, O. L.; ALVAREZ, P.; BARLOW, J.; BARTHOLOMEW, D. C.; BERENGUER, E.; CASTRO, W.; FERREIRA, J. N.; FRANÇA, F. M.; MALHI, Y.; MARIMON, B.; MARIMON JÚNIOR, B. H.; MONTEAGUDO, A.; OLIVEIRA, E. A.; PEREIRA, L. O.; PONTES-LOPES, A.; QUESADA, C. A.; SILVA, C. V. J.; ESPEJO, J. E. S.; SILVEIRA, M.; FELDPAUSCH, T. R.
Afiliação: | LAURA B. VEDOVATO, UNIVERSITY OF EXETER; LIDIANY C. S. CARVALHO, UNIVERSITY OF EXETER; LUIZ E. O. C. ARAGÃO, UNIVERSITY OF EXETER; MICHAEL BIRD, JAMES COOK UNIVERSITY; OLIVER L. PHILLIPS, UNIVERSITY OF LEEDS; PATRÍCIA ALVAREZ, DUKE UNIVERSITY; JOS BARLOW, LANCASTER UNIVERSITY; DAVID C. BARTHOLOMEW, UNIVERSITY OF EXETER; ERIKA BERENGUER, LANCASTER UNIVERSITY; WENDESON CASTRO, UNIVERSIDADE FEDERAL DO ACRE; JOICE NUNES FERREIRA, CPATU; FILIPE M. FRANÇA, UNIVERSITY OF BRISTOL; YADVINDER MALHI, UNIVERSITY OF OXFORD; BEATRIZ MARIMON, UNIVERSIDADE DO ESTADO DE MATO GROSSO; BEN HUR MARIMON JÚNIOR, UNIVERSIDADE DO ESTADO DE MATO GROSSO; ABEL MONTEAGUDO, UNIVERSIDAD NACIONAL DE SAN ANTONIO ABAD DEL CUSCO; EDMAR A. OLIVEIRA, UNIVERSIDADE DO ESTADO DE MATO GROSSO; LUCIANA O. PEREIRA, UNIVERSITY OF EXETER; ALINE PONTES-LOPES, INSTITUTO NACIONAL DE PESQUISAS ESPACIAIS; CARLOS A. QUESADA, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; CAMILA V. J. SILVA, INSTITUTO DE PESQUISA AMBIENTAL DA AMAZÔNIA; JAVIER E. SILVA ESPEJO, UNIVERSIDAD DE LA SERENA; MARCOS SILVEIRA, UNIVERSIDADE FEDERAL DO ACRE; TED R. FELDPAUSCH, UNIVERSITY OF EXETER.
Título: | Ancient fires enhance Amazon forest drought resistance.
Ano de publicação: | 2023
Fonte/Imprenta: | Frontiers in Forests and Global Change, v. 6, 1024101, 2023.
DOI: | https://doi.org/10.3389/ffgc.2023.1024101
Idioma: | Inglês
Conteúdo: | Drought and fire reduce productivity and increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists in situ for centuries to millennia, and represents a legacy of past fires, potentially improving soil fertility and water holding capacity and selecting for the survival and recruitment of certain tree life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical soil properties, wood density, aboveground carbon (AGC) dynamics and forest resistance to severe drought. To achieve our aim, we used an Amazon-wide, long-term plot network, in forests without known recent fires, integrating site-specific measures of forest dynamics, soil properties and a unique soil PyC concentration database. We found that forests with higher concentrations of soil PyC had both higher soil fertility and lower wood density. Soil PyC was not associated with AGC dynamics in non-drought years. However, during extreme drought events (10% driest years), forests with higher concentrations of soil PyC experienced lower reductions in AGC gains (woody growth and recruitment), with this drought-immunizing effect increasing with drought severity. Forests with a legacy of ancient fires are therefore more likely to continue to grow and recruit under increased drought severity. Forests with high soil PyC concentrations (third quartile) had 3.8% greater AGC gains under mean drought, but 33.7% greater under the most extreme drought than forests with low soil PyC concentrations (first quartile), offsetting losses of up to 0.68 Mg C ha?1yr?1 of AGC under extreme drought events. This suggests that ancient fires have legacy effects on current forest dynamics, by altering soil fertility and favoring tree species capable of continued growth and recruitment during droughts. Therefore, mature forest that experienced fires centuries or millennia ago may have greater resistance to current short-term droughts.
Palavras-Chave: | Carbono pirogênico do solo; Composição florestal; Déficit hídrico; Sequestro de carbono.
Thesagro: | Densidade da Madeira; Fertilidade do Solo.
Thesaurus Nal: | Carbon sequestration; Soil fertility; Soil water deficit; Wood density.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (58911-1) - UPC - AP - DD -  -  -  - DIS