%0 Journal Article
%4 sid.inpe.br/mtc-m21d/2023/08.03.15.40
%2 sid.inpe.br/mtc-m21d/2023/08.03.15.40.48
%@doi 10.1038/s41586-023-05971-3
%@issn 0028-0836
%F 20230803
%T Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests
%D 2023
%9 journal article
%A Tavares, Julia Valentim,
%A Oliveira, Rafael S.,
%A Mencuccini, Maurizio,
%A Signori-Müller, Caroline,
%A Pereira, Luciano,
%A Diniz, Francisco Carvalho,
%A Gilpin, Martin,
%A Marca Zevallos, Manuel J.,
%A Salas Yupayccana, Carlos A.,
%A Acosta, Martin,
%A Pérez Mullisaca, Flor M.,
%A Barros, Fernanda de V.,
%A Bittencourt, Paulo,
%A Jancoski, Halina,
%A Scalon, Marina Corrêa,
%A Marimon, Beatriz S.,
%A Oliveras Menor, Imma,
%A Marimon, Ben Hur,
%A Fancourt, Max,
%A Chambers-Ostler, Alexander,
%A Esquivel-Muelbert, Adriane,
%A Rowland, Lucy,
%A Meir, Patrick,
%A Lola da Costa, Antonio Carlos,
%A Nina, Alex,
%A Sanchez, Jesus M. B.,
%A Tintaya, Jose S.,
%A Chino, Rudi S. C.,
%A Baca, Jean,
%A Fernandes, Leticia,
%A Cumapa, Edwin R. M.,
%A Santos, João Antônio R.,
%A Teixeira, Renata,
%A Tello, Ligia,
%A Ugarteche, Maira T. M.,
%A Cuellar, Gina A.,
%A Martinez, Franklin,
%A Araujo-Murakami, Alejandro,
%A Almeida, Everton,
%A da Cruz, Wesley Jonatar Alves,
%A del Aguila Pasquel, Jhon,
%A Aragão, Luiz Eduardo Oliveira e Cruz de,
%A Baker, Timothy R.,
%A de Camargo, Plinio Barbosa,
%A Brienen, Roel,
%A Castro, Wendeson,
%A Ribeiro, Sabina Cerruto,
%A Coelho de Souza, Fernanda,
%A Cosio, Eric G.,
%A Davila Cardozo, Nallaret,
%A da Costa Silva, Richarlly,
%A Disney, Mathias,
%A Espejo, Javier Silva,
%A Feldpausch, Ted R.,
%A Ferreira, Leandro,
%A Giacomin, Leandro,
%A Higuchi, Niro,
%A Hirota, Marina,
%A Honorio, Euridice,
%A Huaraca Huasco, Walter,
%A Lewis, Simon,
%A Flores Llampazo, Gerardo,
%A Malhi, Yadvinder,
%A Monteagudo Mendoza, Abel,
%A Morandi, Paulo,
%A Chama Moscoso, Victor,
%A Muscarella, Robert,
%A Penha, Deliane,
%A Rocha, Mayda Cecília,
%A Rodrigues, Gleicy,
%A Ruschel, Ademir R.,
%A Salinas, Norma,
%A Schlickmann, Monique,
%A Silveira, Marcos,
%A Talbot, Joey,
%A Vásquez, Rodolfo,
%A Vedovato, Laura,
%A Vieira, Simone Aparecida,
%A Phillips, Oliver L.,
%A Gloor, Emanuel,
%A Galbraith, David R.,
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%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress tavares.juliav@gmail.com
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%@electronicmailaddress luiz.aragao@inpe.br
%B Nature
%V 617
%N 7959
%P 111-117
%K Biomass, Carbon, Droughts, Forests, Trees, Tropical Climate, Xylem, Amazon River, carbon, rain, carbon, carbon balance, carbon sink, climate change, hydraulic phenomena, tropical forest, water stress, xylem, Amazonas (Brazil), Article, basin wide biogeographic variation, biogeographic region, biomass, carbon balance, carbon sink, climate change, controlled study, drought, dry season, environmental aspects and related phenomena, geographic distribution, hydraulic safety margin, hydraulic trait, mortality risk, precipitation, prediction, river basin, tree, tropical forest, forest, tropic climate, xylem.
%X Tropical forests face increasing climate risk1,2, yet our ability to predict their response to climate change is limited by poor understanding of their resistance to water stress. Although xylem embolism resistance thresholds (for example, ?50) and hydraulic safety margins (for example, HSM50) are important predictors of drought-induced mortality risk3â5, little is known about how these vary across Earthâs largest tropical forest. Here, we present a pan-Amazon, fully standardized hydraulic traits dataset and use it to assess regional variation in drought sensitivity and hydraulic trait ability to predict species distributions and long-term forest biomass accumulation. Parameters ?50 and HSM50 vary markedly across the Amazon and are related to average long-term rainfall characteristics. Both ?50 and HSM50 influence the biogeographical distribution of Amazon tree species. However, HSM50 was the only significant predictor of observed decadal-scale changes in forest biomass. Old-growth forests with wide HSM50 are gaining more biomass than are low HSM50 forests. We propose that this may be associated with a growthâmortality trade-off whereby trees in forests consisting of fast-growing species take greater hydraulic risks and face greater mortality risk. Moreover, in regions of more pronounced climatic change, we find evidence that forests are losing biomass, suggesting that species in these regions may be operating beyond their hydraulic limits. Continued climate change is likely to further reduce HSM50 in the Amazon6,7, with strong implications for the Amazon carbon sink. © 2023, The Author(s).
%@language en
%3 s41586-023-05971-3.pdf
%U https://www.scopus.com/inward/record.uri?eid=2-s2.0-85153602064&doi=10.1038%2fs41586-023-05971-3&partnerID=40&md5=9846942ff696b0534afcc284bd5ee090
%O Cited by: 1; All Open Access, Green Open Access, Hybrid Gold Open Access