Caatinga biomass estimation

Mar 24, 2011
A tree of Mimosa tenuiflora showing the regrowth two years after pollarding. Credit: P. Gasson

Scientists from Kew and Brazil are analysing data from field experiments to determine the best way to manage trees for sustainable fuelwood production.

As part of a project on the sustainable management of fuelwood in regenerating caatinga of Pernambuco State, Brazil, new allometric equations have been developed to estimate the of the four study species: Mimosa ophthalmocentra, M. tenuiflora, Caesalpinia pyramidalis and Croton sonderianus.

From measurements of 1,200 individuals, it was found that previous equations for mature caatinga and other tropical vegetation types overestimated the biomass of the study trees by more than 20%, possibly because the trees have reduced crowns and lower branch masses. The best fitting of the new allometric equations were power equations based on tree diameter at breast height, with little improvement by including height, crown area and/or wood density.

Such equations have rarely been validated in field conditions and never for dry tropical forest such as caatinga. There is clearly some risk involved in extrapolating equations from one site or vegetation type to another. The results are published in the journal Forest Ecology and Management.

Explore further: FACT CHECK: Both sides in Keystone XL debate bend facts

Provided by Royal Botanic Gardens, Kew

not rated yet
add to favorites email to friend print save as pdf

Related Stories

Scientists Coax Carbon into Reclaimed Mine Lands, Forests

Apr 18, 2006

Three University of Wyoming researchers are attempting to determine best-management practices to harness the Earth's primal forces and turn landscapes into sponges for carbon. Or, at least through the efforts of Pete Stahl, ...

Faster koa tree growth without adverse ecosystem effects

Mar 27, 2008

U.S. Forest Service scientists with the Institute of Pacific Islands Forestry have completed a study on ways to make high-value koa trees grow faster, while increasing biodiversity, carbon sequestration, scenic ...

The desert is dying

Feb 14, 2007

Researchers from University of Bergen have found that trees, which are a main resource for desert people and their flocks, are in significant decline in the hyper-arid Eastern Desert of Egypt.

New method for solving differential equations

Jan 24, 2008

Dutch-sponsored mathematician Valeriu Savcenco has developed new methods for the numerical solution of ordinary differential equations. These so-called multirate methods are highly efficient for large systems, where some ...

Seeing The Forest And The Trees

Oct 24, 2005

With human emissions of carbon dioxide on the rise, there is growing interest in maintaining the Earth's natural mechanisms that absorb and store carbon.

Recommended for you

FACT CHECK: Both sides in Keystone XL debate bend facts

55 minutes ago

Supporters of the Keystone XL pipeline, which would run from Canada to the Gulf, say the privately funded, $8 billion project is a critically needed piece of infrastructure that will create thousands of jobs ...

Sao Paulo warns of severe water rationing

2 hours ago

Authorities in Sao Paulo, Brazil's richest state and economic hub, have warned they are considering severe water rationing if the country's worst drought in 80 years continues.

Refineries challenge EPA plan to cut emissions

5 hours ago

A rule proposed by the Environmental Protection Agency that aims to curb emissions from oil refineries and petrochemical manufacturers is causing tensions to flare between the agency and industry groups. The agency is reviewing ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.