9 documents found, page 1 of 1

Modelagem de desmatamento e emissões de gases de efeito estufa na região sob in...

Height-diameter allometry of tropical forest trees

Tropical tree height-diameter (<i>H:D</i>) relationships may vary by forest type and region making large-scale estimates of above-ground biomass subject to bias if they ignore these differences in stem allometry. We have therefore developed a new global tropical forest database consisting of 39 955 concurrent <i>H</i> and <i>D</i> measurements encompassing 283 sites in 22 tropical countries. Utilising this data...

Biomassa de árvores na Amazônia central :

Este estudo foi realizado numa área de floresta densa de terra firme na Amazônia central sobre platô com latossolo argiloso. Foram amostradas 310 árvores, com diâmetro na altura do peito (DAP) entre 5 e 122 cm, representando 186 espécies e morfo-espécies. Os objetivos principais foram: (i) determinar a densidade média de madeira das árvores (peso seco a 103°C dividido pelo volume fresco) e as variações radiais ...

Maintaining carbon stocks in extractive reserves in Brazilian Amazonia

Extractive reserves in the Amazon Forest maintain carbon stocks out of the atmosphere, thereby avoiding greenhouse-gas emissions that provoke global warming. This and other environmental services, such as recycling water and maintaining biodiversity, provide major reasons for creating these reserves and for according them priority in government programs. The importance of reducing carbon emissions from deforest...

Soil Carbon Stocks under Amazonian Forest: Distribution in the Soil Fractions a...

Tree height integrated into pantropical forest biomass estimates

Aboveground tropical tree biomass and carbon storage estimates commonly ignore tree height (H). We estimate the effect of incorporating H on tropics-wide forest biomass estimates in 327 plots across four continents using 42 656 H and diameter measurements and harvested trees from 20 sites to answer the following questions: ; 1. What is the best H-model form and geographic unit to include in biomass models to mi...

Inter-site variation in allometry and wood density of goupia glabra aubl. In am...

The present study aims to compare the allometry and wood density of Goupia glabra Aubl. (Goupiaceae) in two different terra-firme sites in Amazonian forest. A total of 65 trees ≥ 10 cm DBH was sampled in both sites, with 39 trees in Nova Olinda do Norte (NOlinda, near the Amazon River) and 29 trees in Apui (near the southern edge of the Amazon forest). Except for the relationship between DBH (diameter at breast...

Carbon stocks and losses to deforestation in protected areas in Brazilian Amazonia

By 2014 approximately 2.2 million km2 (~43%) of Brazil’s Legal Amazonia region had been incorporated into an extensive network of 718 protected areas, which are comprised by 372 indigenous lands, 313 federal, state and municipal (county) conservation units, and 33 Maroon territories (Quilombos). Although protected areas occupy vast expanses in Amazonia, their importance as carbon reserves needs to be better und...

Deforestation and Carbon Stock Loss in Brazil’s Amazonian Settlements

We estimate deforestation and the carbon stock in 2740 (82 %) of the 3325 settlements in Brazil’s Legal Amazonia region. Estimates are made both using available satellite data and a carbon map for the “pre-modern” period (prior to 1970). We used data from Brazil’s Project for Monitoring Deforestation in Amazonia updated through 2013 and from the Brazilian Biomes Deforestation Monitoring Project (PMDBBS) updated...