Results 11 to 20 of about 83,454 (188)

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

Densidade básica da madeira de espécies arbóreas de Cerradão no estado de Tocantins

Pesquisa Florestal Brasileira, 2015
O objetivo desse estudo foi analisar a densidade básica de espécies arbóreas da fitofisionomia Cerradão, no domínio do Cerrado no estado do Tocantins, e estabelecer a relação entre a densidade básica da madeira dos troncos em função da densidade básica ...
Carlos José da Silva, Ailton Teixeira do Vale, Eder Pereira Miguel   +2 more
doaj   +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

INFLUÊNCIA DA DENSIDADE NA DUREZA JANKA EM OITO ESPÉCIES MADEIREIRAS DA AMAZÔNIA CENTRAL [PDF]

Acta Amazonica, 1992
O presente trabalho teve por objetivo estudar a relação da densidade básica com a resistência de madeiras tropicais, submetidas ao teste de dureza Janka nos extremos e faces nas condições verde e seca a 12% de conteúdo de umidade.
Danilo Fernandes da Silva Filho, Jadir de Souza Rocha, José Brandão de Moura   +2 more
doaj   +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

Caracterização anatômica e qualidade do carvão vegetal da madeira de pau-jacaré (Piptadenia gonoacantha)

Pesquisa Florestal Brasileira, 2013
Diante da carência de informação sobre as propriedades da madeira e do carvão de espécies nativas esse trabalho foi desenvolvido com os objetivos de caracterizar a estrutura anatômica da madeira de Piptadenia gonoacantha e determinar o rendimento e ...
Renato Augusto Pereira Damásio, Bárbara Luísa Corradi Pereira, Aylson Costa Oliveira, Marco Túlio Cardoso, Benedito Rocha Vital, Ana Márcia Ladeira Macedo Carvalho   +5 more
doaj   +3 more sources

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

Acta Amazonica, 1988
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. As características dimensionais das fibras e dos elementos de vasos da madeira em estudo apresentaram
Francisco Juvenal Lima Frazão
doaj   +1 more source