Results 1 to 10 of about 15,563 (166)

Critical transitions in the Amazon forest system. [PDF]

Nature
AbstractThe possibility that the Amazon forest system could soon reach a tipping point, inducing large-scale collapse, has raised global concern1–3. For 65 million years, Amazonian forests remained relatively resilient to climatic variability. Now, the region is increasingly exposed to unprecedented stress from warming temperatures, extreme droughts ...
Flores BM, Montoya E, Sakschewski B, Nascimento N, Staal A, Betts RA, Levis C, Lapola DM, Esquível-Muelbert A, Jakovac C, Nobre CA, Oliveira RS, Borma LS, Nian D, Boers N, Hecht SB, Ter Steege H, Arieira J, Lucas IL, Berenguer E, Marengo JA, Gatti LV, Mattos CRC, Hirota M.   +23 more
europepmc   +10 more sources

Climate drivers of the Amazon forest greening. [PDF]

PLoS One, 2017
Our limited understanding of the climate controls on tropical forest seasonality is one of the biggest sources of uncertainty in modeling climate change impacts on terrestrial ecosystems. Combining leaf production, litterfall and climate observations from satellite and ground data in the Amazon forest, we show that seasonal variation in leaf production
Wagner FH, Hérault B, Rossi V, Hilker T, Maeda EE, Sanchez A, Lyapustin AI, Galvão LS, Wang Y, Aragão LEOC.   +9 more
europepmc   +7 more sources

EVALUATION OF THE IMPACT OF WOOD FOREST MANAGEMENT OPERATIONS ON AMAZON NUT TREES IN FOREST CONCESSION AREAS IN THE AMAZON [PDF]

Revista Árvore
The Amazon rainforest holds has immense biodiversity and offers various possibilities for use. Moreover, there is an increasing need for development models that reconcile the rational use of forest resources with socio-economic development.
Joana Keila da Silva Gomes, Thiago Augusto da Cunha, Lúcia Helena de Oliveira Wadt, Evandro Orfanó Figueiredo   +3 more
doaj   +2 more sources

Temporal Analysis of Forest Fragmentation in the Amazon Rainforest of Tocantins State, Brazil [PDF]

Floresta e Ambiente, 2023
The Amazon Rainforest presents intense pressure from agricultural and cattle farming activities on its forest remnants, which promotes forest fragmentation.
Thaiana Brunes Feitosa, Milton Marques Fernandes, Márcia Rodrigues de Moura Fernandes, Renisson Neponuceno Araújo Filho   +3 more
doaj   +1 more source

The drivers and impacts of Amazon forest degradation [PDF]

Science, 2023
Approximately 2.5 × 10 6 square kilometers of the Amazon forest are currently degraded by fire, edge effects, timber extraction, and/or extreme drought, representing 38% of all remaining forests in the region. Carbon emissions from this degradation total up to 0.2 petagrams of carbon per year (Pg C year −
David M. Lapola, Patricia Pinho, Jos Barlow, Luiz E. O. C. Aragão, Erika Berenguer, Rachel Carmenta, Hannah M. Liddy, Hugo Seixas, Camila V. J. Silva, Celso H. L. Silva-Junior, Ane A. C. Alencar, Liana O. Anderson, Dolors Armenteras, Victor Brovkin, Kim Calders, Jeffrey Chambers, Louise Chini, Marcos H. Costa, Bruno L. Faria, Philip M. Fearnside, Joice Ferreira, Luciana Gatti, Victor Hugo Gutierrez-Velez, Zhangang Han, Kathleen Hibbard, Charles Koven, Peter Lawrence, Julia Pongratz, Bruno T. T. Portela, Mark Rounsevell, Alex C. Ruane, Rüdiger Schaldach, Sonaira S. da Silva, Celso von Randow, Wayne S. Walker   +34 more
openaire   +5 more sources

Governance lessons from the Atlantic Forest to the conservation of the Amazon

Perspectives in Ecology and Conservation, 2023
Brazilian forests critical are for climate, water, biodiversity, and ecosystem services. The Atlantic Forest and the Amazon are among the most important tropical forests of the world but have different conservation status.
Luís Fernando Guedes Pinto, Joice Ferreira, Erika Berenguer, Marcos Rosa   +3 more
doaj   +1 more source

Sensitivity of Optical Satellites to Estimate Windthrow Tree-Mortality in a Central Amazon Forest

Remote Sensing, 2023
Windthrow (i.e., trees broken and uprooted by wind) is a major natural disturbance in Amazon forests. Images from medium-resolution optical satellites combined with extensive field data have allowed researchers to assess patterns of windthrow tree ...
Luciano Emmert, Robinson Isaac Negrón-Juárez, Jeffrey Quintin Chambers, Joaquim dos Santos, Adriano José Nogueira Lima, Susan Trumbore, Daniel Magnabosco Marra   +6 more
doaj   +1 more source

The changing Amazon forest [PDF]

Philosophical Transactions of the Royal Society B: Biological Sciences, 2008
Long-term monitoring of distributed, multiple plots is the key to quantify macroecological patterns and changes. Here we examine the evidence for concerted changes in the structure, dynamics and composition of old-growth Amazonian forests in the late twentieth century.
Phillips, OL, Lewis, SL, Baker, TR, Chao, K, Higuchi, N   +4 more
openaire   +4 more sources

Canopy Position Influences the Degree of Light Suppression of Leaf Respiration in Abundant Tree Genera in the Amazon Forest

Frontiers in Forests and Global Change, 2021
Leaf respiration in the dark (Rdark) and light (Rday) is poorly characterized in diverse tropical ecosystems, and little to no information exists on the degree of light suppression in common tree species within the Amazon basin, and their dependences ...
Daisy C. Souza, Kolby J. Jardine, João V. F. C. Rodrigues, Bruno O. Gimenez, Bruno O. Gimenez, Alistair Rogers, Nate McDowell, Anthony P. Walker, Niro Higuchi, Israel J. Sampaio-Filho, Jeffrey Chambers   +10 more
doaj   +1 more source

Forest Fragmentation and Fires in the Eastern Brazilian Amazon–Maranhão State, Brazil

Fire, 2022
Tropical forests provide essential environmental services to human well-being. In the world, Brazil has the largest continuous area of these forests. However, in the state of Maranhão, in the eastern Amazon, only 24% of the original forest cover remains.
Celso H. L. Silva-Junior, Arisson T. M. Buna, Denilson S. Bezerra, Ozeas S. Costa, Adriano L. Santos, Lidielze O. D. Basson, André L. S. Santos, Swanni T. Alvarado, Catherine T. Almeida, Ana T. G. Freire, Guillaume X. Rousseau, Danielle Celentano, Fabricio B. Silva, Maria S. S. Pinheiro, Silvana Amaral, Milton Kampel, Laura B. Vedovato, Liana O. Anderson, Luiz E. O. C. Aragão   +18 more
doaj   +1 more source