Ancient fires enhance Amazon forest drought resistance

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Ancient fires enhance Amazon forest drought resistance

Vedovato, Laura B. (författare): Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom

Carvalho, Lidiany C. S. (författare): Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom

Aragão, Luiz E. O. C. (författare): Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom; Earth Observation and Geoinformatics Division, National Institute for Space Research, São José dos Campos, Brazil

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Bird, Michael (författare): College of Science and Engineering, James Cook University, QLD, Cairns, Australia; ARC Centre of Excellence for Australian Biodiversity and Heritage, James Cook University, QLD, Cairns, Australia

Phillips, Oliver L. (författare): School of Geography, University of Leeds, Leeds, United Kingdom

Alvarez, Patrícia (författare): Center for Tropical Conservation, Duke University, NC, Durham, United States

Barlow, Jos (författare): Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom

Bartholomew, David C. (författare): Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom

Berenguer, Erika (författare): Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom

Castro, Wendeson (författare): Laboratory of Botany and Plant Ecology, Federal University of Acre, Rio Branco, Brazil; Amazonia Green Landscape Protection and Governance Programme, SOS Amazônia, Rio Branco, Brazil

Ferreira, Joice (författare): Embrapa Amazônia Oriental, Belém, Brazil

França, Filipe M. (författare): School of Biological Sciences, University of Bristol, Bristol, United Kingdom

Malhi, Yadvinder (författare): Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom

Marimon, Beatriz (författare): Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil

Marimon Júnior, Ben Hur (författare): Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil

Monteagudo, Abel (författare): Facultad de Ciencias, Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru

Oliveira, Edmar A. (författare): Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil

Pereira, Luciana O. (författare): Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom

Pontes-Lopes, Aline (författare): Earth Observation and Geoinformatics Division, National Institute for Space Research, São José dos Campos, Brazil

Quesada, Carlos A. (författare): Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil

Silva, Camila V. J. (författare): Instituto de Pesquisa Ambiental da Amazônia (IPAM), Brasília, Brazil

Silva Espejo, Javier E. (författare): Departamento de Biología, Universidad de La Serena, La Serena, Chile

Silveira, Marcos (författare): Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, Brazil

Feldpausch, Ted R. (författare): Faculty of Environment, Science and Economy, University of Exeter, Exeter, United Kingdom

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2023-02-14
2023
Engelska.
Ingår i: Frontiers in Forests and Global Change. - : Frontiers Media SA. - 2624-893X. ; 6

Relaterad länk:: https://doi.org/10.3...; visa fler...; https://umu.diva-por... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.3...; visa färre...

Tidskriftsartikel (refereegranskat)

Abstract Ämnesord

Stäng

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.

Ämnesord

NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)

Nyckelord

carbon sequestration
forest composition
historical fires
soil fertility
soil pyrogenic carbon
water deficit
wood density

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art (ämneskategori)

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NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Ekologi

LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Lantbruksvetensk ...; och Skogsvetenskap

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Av lärosätet: Umeå universitet

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