Results 61 to 70 of about 106,383 (226)

Large emissions from floodplain trees close the Amazon methane budget [PDF]

, 2017
Wetlands are the largest global source of atmospheric methane (CH4), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH4 in the tropics, consistently underestimate the ...
A Siegenthaler, AA Bloom, AA Bloom, AH Devol, AJ Webb, Alex Enrich-Prast, B Ringeval, C Frankenberg, C Frankenberg, C Wilson, Cassia Mônica Sakuragui, D Bastviken, David Bastviken, Edward R. C. Hornibrook, EM Latrubesse, Emanuel Gloor, F Keppler, GO Martinson, H Rusch, H Schaefer, HO Sawakuchi, Humberto Marotta, JB Miller, JM Melack, John Bharat Miller, KB Bartlett, L Belger, LL Hess, LL Hess, LS Santiago, Luana S. Basso, Luana Silva Braucks Calazans, Luciana V. Gatti, Olaf Malm, R Fisher, Roberta Bittencourt Peixoto, RR Draxler, S Kirschke, S Pitz, SR Pangala, SR Pangala, SR Pangala, Sunitha R. Pangala, Veronika Beck, Vincent Gauci, Wanderley Rodrigues Bastos, ZP Wang   +46 more
core   +1 more source

Height, volume and form factor equations for Tectona grandis L.f. in Alta Floresta (MT)

Scientia Agraria Paranaensis, 2020
Studies on allometric models are essential for quantifying the potential of a stand, especially when the objective is to know the wood stock through estimates. This study aimed to select height, volume and artificial form factor equations for a teak stand with data from a sample with 81 trees at 96 months in different diameter classes.
Adriana Coimbra de Morais, Thelma Shirlen Soares, Edmilson Santos Cruz   +2 more
openaire   +2 more sources

Small understory trees increase growth following sustained drought in the Amazon

New Phytologist, Volume 249, Issue 6, Page 2787-2799, March 2026.
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 ...
Mateus C. Silva, David C. Bartholomew, André L. Giles, Paulo R. L. Bittencourt, Pablo Sanchez‐Martinez, Lion R. Martius, Vanessa N. Rodrigues, Rachel Selman, João P. Reis, Grazielle S. Teodoro, Rafael S. Oliveira, Oliver Binks, Maurizio Mencuccini, João A. Silva Junior, Antonio C. L. da Costa, Patrick Meir, Lucy Rowland   +16 more
wiley   +1 more source

Análise fitossociológica de floresta ombrófila densa e determinação de espécies-chave para recuperação de área degradada através da adequação do índice de valor de importância. [PDF]

, 2016
Na Floresta Nacional Saracá-Taquera, estado do Pará, a lavra da bauxita é feita a céu aberto. As operações de lavra envolvem desde a supressão da floresta ombrófila densa até a restauração das áreas através de reflorestamentos heterogêneos, onde são ...
BRIENZA JUNIOR, S., GOMES, V. H. F., SALOMÃO, R. de P., SANTANA, A. C. de   +3 more
core  

The Role of Elevation, Connectivity and Land Cover on Migratory and Non‐Migratory Fish Communities in an Amazonian Riverine System

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT Dams and deforestation are key drivers of freshwater biodiversity loss in the Amazon, as they alter river connectivity, water quality and habitat structure. This study investigates how connectivity (Reach Connectivity Index—RCI), elevation and natural land cover influence the diversity and composition of fish assemblages in a highly fragmented
Izaias Médice Fernandes, Hugmar Pains da Silva, Giulianna Rondineli Carmassi, Alberto Luciano Carmassi, Cláudio Henrique Zawadzki, Jhony Vendrusculo, Luzia da Silva Lourenço   +6 more
wiley   +1 more source

The paradoxical situation of the white-lipped peccary (Tayassu pecari) in the state of Mato Grosso, Brazil

Perspectives in Ecology and Conservation, 2019
Populations of white-lipped peccaries, Tayassu pecari, have already been extirpated or drastically reduced in much of the Neotropics, but are still relatively abundant in the Brazilian state of Mato Grosso, the country's largest maize and soy producer ...
Mendelson Lima, Carlos Augusto Peres, Mark Ilan Abrahams, Carlos Antonio da Silva Junior, Gerlane de Medeiros Costa, Reginaldo Carvalho dos Santos   +5 more
doaj   +1 more source

Efeito da exploração florestal de impacto reduzido sobre a regeneração natural em uma floresta densa de terra firme no município de Paragominas na Amazônia brasileira. [PDF]

, 2015
O estudo foi motivado pela escassez de informações sobre a sustentabilidade ecológica da exploração de florestas naturais, em áreas diretamente afetadas pela exploração. O objetivo foi verificar se há diferença florística entre a floresta não-explorada e
CARVALHO, C. J. R. de, CARVALHO, J. O. P. de, HIRAI, E. H., QUEIROZ, W. T. de, SILVA, J. N. M.   +4 more
core  

Dietary Bordão‐De‐Velho (Samanea tubulosa) Fruit Improves Grazing Beef Cattle Performance

New Zealand Journal of Agricultural Research, Volume 69, Issue 1, February 2026.
Integrated grass‐tree systems have been proposed to address socio‐ecological challenges in tropical cattle production. Bordão‐de‐velho (Samanea tubulosa), a legume tree native to the Amazon, is commonly found in degraded pastures and valued by farmers for its soil, forage, and livestock benefits.
Vanderson E. Meira, Alexandre A. Olival, Jozivaldo P. G. de Moraes, Mariana Campana, Tiago A. Del Valle   +4 more
wiley   +1 more source

RESPONSE OF THE TYPE OF NITROGEN RESOURCE IN THE QUALITY OF MAIZE CULTIVATED IN SOUTHERN AMAZONIA

Tropical and Subtropical Agroecosystems, 2019
Nitrogen is the nutrient most absorbed by maize crop and is usually the most limiting for development, especially when it is intended to work with maize cultivars with grain suitability and silage.
Marco Antonio Camillo de Carvalho, Elton Douglas Ribeiro Mendes, Oscar Mitsuo Yamashita, Rivanildo Dallacort, Ivone Vieira da Silva, Lara Caroline Alves de Oliveira, Samiele Camargo de Oliveira Domingues   +6 more
doaj  

Dinâmica da fronteira agrícola do Mato Grosso e implicações para a saúde [PDF]

, 2017
As transformações mais profundas nos ecossistemas amazônicos foram produzidas pela expansão da fronteira agrícola. No norte de Mato Grosso, esse fenômeno contribuiu com a derrubada e queima de mais de 50% da floresta nativa.
Tourrand, Jean-François, Villamizar Sayago, Doris Aleida, Weihs, Marla   +2 more
core   +3 more sources