Nature plants · 2025

Increasing tree size across Amazonia.

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Esquivel-Muelbert Adriane, Banbury Morgan Rebecca, Brienen Roel, Gloor Emanuel, Lewis Simon L, Dexter Kyle G, Almeida Everton, Almeida de Oliveira Edmar, Álvarez-Dávila Esteban, Alves de Oliveira Atila, Andrade Ana, Vieira Simone Aparecida, Aragão Luiz, Araujo-Murakami Alejandro, Arets Eric, Arroyo Luzmila, Aymard-Corredor Gerardo, Banki Olaf, de Camargo Plinio Barbosa, Barroso Jorcely, Blanc Lilian, Brown Foster, Camargo José Luís, Castro Wendeson, Chama Moscoso Victor, Chave Jérôme, Chavez Ezequiel, Comiskey James, da Costa Antônio Carlos Lola, Del Aguila Pasquel Jhon, Derroire Géraldine, Di Fiore Anthony, Fauset Sophie, Feldpausch Ted R, Flores Llampazo Gerardo, Guillen Villaroel Rene, Herrera Rafael, Higuchi Niro, Honorio Coronado Eurídice, Huamantupa-Chuquimaco Isau, Huaraca Huasco Walter, Jimenez Eliana, Killeen Timothy, Laurance Susan, Laurance William, Levesley Aurora, Lopez-Gonzalez Gabriela, Malhi Yadvinder, Marimon Beatriz, Marimon Junior Ben Hur, Matias de Almeida Reis Simone, Mendoza Bautista Casimiro, Polo Irina Mendoza, Monteagudo-Mendoza Abel, Morandi Paulo Sérgio, Nogueira Lima Adriano, Núñez Vargas Percy, Pallqui Camacho Nadir, Parada Gutierrez Alexander, Peacock Julie, Peñuela-Mora Maria Cristina, Pickavance Georgia, Pipoly John, Pitman Nigel, Prieto Adriana, Quesada Carlos, Ramirez Arevalo Freddy, Réjou-Méchain Maxime, Restrepo Correa Zorayda, Rojas Rocio, Rodriguez Bayona Lily, Roopsind Anand, Salomão Rafael, Silva Natalino, Silva Espejo Javier, Silveira Marcos, Stropp Juliana, Talbot Joey, Ter Steege Hans, Terborgh John, Thomas Raquel, Gamarra Luis Valenzuela, van der Hout Peter, Vasquez Martinez Rodolfo, Guimarães Vieira Ima Célia, Vilanova Emilio, Zagt Roderick, Baker Timothy R, Phillips Oliver L

Аннотация

Climate change and increasing availability of resources such as carbon dioxide are modifying forest functioning worldwide, but the effects of these changes on forest structure are unclear. As additional resources become available, for example, through CO2 fertilization or nitrogen deposition, large trees, with greater access to light, may be expected to gain further advantages. Conversely, smaller light-suppressed trees might benefit more if their light compensation point changes, while bigger trees may be the most negatively impacted by increasing heat and drought. We assessed recent changes in the structure of Earth's largest tropical forest by analysing 30 years of Amazonian tree records across 188 mature forest plots. We find that, at a stand level, trees have become larger over time, with mean tree basal area increasing by 3.3% per decade (95% CI 2.4; 4.1). Larger trees have increased in both number and size, yet we observed similar rates of relative size gain in large and small trees. This evidence is consistent with a resource-driven boost for larger trees but also a reduction in suppression among smaller trees. These results, especially the persistence and consistency of tree size increases across Amazonian forest plots, communities and regions, indicate that any negative impacts of climate change on forests and large trees here have so far been mitigated by the positive effects of increased resources.

Предметные рубрики MeSH

Trees Climate Change Forests Brazil Tropical Climate

Increasing tree size across Amazonia.

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Аннотация

Предметные рубрики MeSH