Results 11 to 20 of about 10,752,347 (184)

Reportando a densidade da madeira ao teor de umidade de referência [PDF]

E&S Engineering and Science, 2015
A atual norma brasileira para o Projeto de Estruturas de Madeira define densidade aparente como a relação entre a massa e o volume do corpo-de-prova estabilizado ao teor de umidade de referência, adotado em 12%. Estabilizar o teor de umidade da madeira em exatos 12% é tarefa impraticável, o adequado seria estabilizar o corpo-de-prova em um teor de ...
Soares, Rayne da Conceição, Logsdon, Norman Barros, Jesus, José Manoel Henriques de   +2 more
openaire   +5 more sources

Mapping the density of giant trees in the Amazon. [PDF]

New Phytol
Summary Tall trees (height ≥ 60 m) are keystone elements of tropical forests, strongly influencing biodiversity, carbon storage, and ecosystem resilience. Yet, their density and spatial distribution remain poorly quantified, especially in remote Amazonian regions, limiting our understanding of their ecological roles and contribution to forest–climate ...
de Lima RB, da Silva DAS, Nunes MH, Bittencourt PRL, Groenendyk P, de Oliveira CP, Granato-Souza D, Caraciolo Ferreira RL, Aleixo da Silva JA, Aguirre-Gutiérrez J, Jackson T, de Matos Filho JR, Aparício PDS, da Silva JPG, de Toledo JJ, Guedes MC, de Almeida DRA, Higuchi N, Wagner FH, Ometto JP, Görgens EB.   +20 more
europepmc   +2 more sources

Small understory trees increase growth following sustained drought in the Amazon. [PDF]

New Phytol
Summary Droughts pose a major threat to the Amazon rainforest, yet the mechanisms enabling trees to maintain growth under prolonged drought remain poorly understood, particularly in the understory layer. We leveraged a 22‐yr Throughfall Exclusion (TFE) in a 1‐ha plot in eastern Amazonia, paired with a Control plot, to test whether small understory ...
Silva MC, Bartholomew DC, Giles AL, Bittencourt PRL, Sanchez-Martinez P, Martius LR, Rodrigues VN, Selman R, Reis JP, Teodoro GS, Oliveira RS, Binks O, Mencuccini M, Silva Junior JA, da Costa ACL, Meir P, Rowland L.   +16 more
europepmc   +2 more sources

Variação da densidade da madeira de oliveiras no ano de 2022 na região de Pelotas/RS [PDF]

, 2023
O objetivo foi a comparação da densidade da madeira da oliveira na região de Pelotas ...
Reveilleau Júnior, Vilson Luís, Antunes, Eva Juimara Ricardo, Mello-Farias, Paulo Celso de, Herter, Flávio Gilberto, Canul, Katia Guadalupe Ruiz   +4 more
core   +3 more sources

Climate and crown damage drive tree mortality in southern Amazonian edge forests

Journal of Ecology, Volume 110, Issue 4, Page 876-888, April 2022., 2022
Tree death is a key process for our understanding of how forests are responding to global change. Our long‐term research shows that more than 70% of all trees dying in this critical region at the edge of Amazonia already had markedly broken and damaged crowns years before they died.
Simone M. Reis, Beatriz S. Marimon, Adriane Esquivel‐Muelbert, Ben Hur Marimon Jr, Paulo S. Morandi, Fernando Elias, Edmar A. de Oliveira, David Galbraith, Ted R. Feldpausch, Imma O. Menor, Yadvinder Malhi, Oliver L. Phillips   +11 more
wiley   +1 more source

Distinct leaf water potential regulation of tree species and vegetation types across the Cerrado–Amazonia transition

Biotropica, Volume 54, Issue 2, Page 431-443, March 2022., 2022
Our article finds that dominant species from a tall woodland savanna have similar leaf water potential regulation than savanna species and different than forest species at the Amazonia–Cerrado transition. Abstract The Cerrado–Amazonia transition harbors forest and savanna formations under the influence of pronounced climate seasonality; however, the ...
Halina Soares Jancoski, Beatriz Schwantes Marimon, Marina C. Scalon, Fernanda de V. Barros, Ben Hur Marimon‐Junior, Eder Carvalho, Rafael S. Oliveira, Imma Oliveras Menor   +7 more
wiley   +1 more source

Variation of non‐structural carbohydrates across the fast–slow continuum in Amazon Forest canopy trees

Functional Ecology, Volume 36, Issue 2, Page 341-355, February 2022., 2022
A free Plain Language Summary can be found within the Supporting Information of this article. Abstract Tropical tree species span a range of life‐history strategies within a fast–slow continuum. The position of a species within this continuum is thought to reflect a negative relationship between growth and storage, with fast‐growing species allocating ...
Caroline Signori‐Müller, Rafael S. Oliveira, Julia Valentim Tavares, Francisco Carvalho Diniz, Martin Gilpin, Fernanda de V. Barros, Manuel J. Marca Zevallos, Carlos A. Salas Yupayccana, Alex Nina, Mauro Brum, Timothy R. Baker, Eric G. Cosio, Yadvinder Malhi, Abel Monteagudo Mendoza, Oliver L. Phillips, Lucy Rowland, Norma Salinas, Rodolfo Vasquez, Maurizio Mencuccini, David Galbraith   +19 more
wiley   +1 more source

Coffee pulp accelerates early tropical forest succession on old fields

Ecological Solutions and Evidence, Volume 2, Issue 1, January–March 2021., 2021
(A) Freshly added layer of coffee pulp on post‐agricultural land. (B) Control treatment two years after initiating study. (C) Woody vegetation growing on coffee pulp treatment two years after initiating the study, photo credits R. Cole. (D) Aerial view of the coffee pulp treatment (bottom) and the adjacent control treatment (top) one year after ...
Rebecca J. Cole, Rakan A. Zahawi
wiley   +1 more source

Características da madeira e da polpa kraft não branqueada de Eucalyptus deglupta Blume introduzido na região de Manaus - AM. [PDF]

Acta Amazonica, 1987
O objetivo deste trabalho foi comparar as características da madeira e das, propriedades da polpa de E. deglupta Bl., tendo como referência o E. saligna.
Francisco Juvenal Lima Frazão
doaj   +1 more source

Teor de umidade e densidade básica da madeira de nove espécies comerciais amazônicas [PDF]

, 2013
Este trabalho teve como objetivo agrupar espécies com características de teor de umidade e densidade básica da madeira semelhantes para compor cargas mistas de espécies para secagem em câmaras industriais de secagem da madeira.
Vale,Ailton Teixeira do, Silveira,Lívia Helena Carrera, Rezende,Alba Valéria, Maciel, Norma da Silva Rocha, Silveira, Lívia Helena Carrera, Ailton Teixeira do Vale, Rezende, Alba Valeria   +6 more
core   +1 more source