نتایج جستجو برای: timber trees

تعداد نتایج: 97259  

2012
E K Biggs H Taplin M C Calver

The Jarrah forest of southwestern Australia supports mineral and timber production and provides important food plants for three threatened black-cockatoo species. To assist the integration of conservation and production objectives, we studied the landscape distribution of two important black-cockatoo food sources, the eucalypts Jarrah Eucalyptus marginata and Marri Corymbia calophylla, at a min...

2016
Sonja Hassold Porter P Lowry Martin R Bauert Annick Razafintsalama Lolona Ramamonjisoa Alex Widmer

Illegal selective logging of tropical timber is of increasing concern worldwide. Madagascar is a biodiversity hotspot and home to some of the world's most sought after tropical timber species. Malagasy rosewoods belong to the genus Dalbergia (Fabaceae), which is highly diverse and has a pantropical distribution, but these timber species are among the most threatened as a consequence of intensiv...

2018
M Arasumani Danish Khan Arundhati Das Ian Lockwood Robert Stewart Ravi A Kiran M Muthukumar Milind Bunyan V V Robin

Tropical montane habitats, grasslands, in particular, merit urgent conservation attention owing to the disproportionate levels of endemic biodiversity they harbour, the ecosystem services they provide, and the fact that they are among the most threatened habitats globally. The Shola Sky Islands in the Western Ghats host a matrix of native forest-grassland matrix that has been planted over the l...

2016
Juan M. Pulhin Mark Anthony M. Ramirez

Forest tenure reform has no doubt attained significant gains in promoting social justice and equity in the forest sector, through legal recognition of the communities’ property rights over forest lands in many developing countries. This includes the right to harvest and market trees that the communities planted. Along these lines, the Philippines’ community-based forest management (CBFM) and sm...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
Lilian Blanc Marion Echard Bruno Herault Damien Bonal Eric Marcon Jérôme Chave Christopher Baraloto

The expansion of selective logging in tropical forests may be an important source of global carbon emissions. However, the effects of logging practices on the carbon cycle have never been quantified over long periods of time. We followed the fate of more than 60 000 tropical trees over 23 years to assess changes in aboveground carbon stocks in 48 1.56-ha plots in French Guiana that represent a ...

2012
William Stewart Shasta Ferranto Gary Nakamura Christy Getz Lynn Huntsinger Maggi Kelly

Families or family businesses own nearly all of the private redwood forestland in California. Family forest owners have practiced both subdivision and silviculture for decades but the dominant theme for most family owners is environmental stewardship. Parcel size is more important than expressed values as a predictor of resource management activities. All landowners with more than 50 acres unde...

2009
Greg Searles John Moore

At present, mills producing structural timber generally undertake strength grading at the end of the production process, i.e., after buying the material and sawing it into timber which is then dried. This means that any variation in wood stiffness between forest stands and between trees is unknown and unaccounted for until the end of the manufacturing process. Portable stress-wavebased tools pr...

Journal: :Work 2012
Amaury Paulo de Souza Luciano José Minette André Luis Petean Sanches Emília Pio da Silva Valéria Antônia Justino Rodrigues Luciana Aparecida de Oliveira

There are several forest operations involved in Eucalyptus timber harvesting. This study was carried out during brush-cutting; tree felling, bucking, delimbing, piling and manual extraction operations, with the following objectives: a) analyzing, ergonomically, two systems of brush-cutting: one manual and the other semi-mechanized, using two different machines; b) ergonomically evaluating three...

2002
Damien Moloney Kevin Wormington Stephen DeStefano

Dead standing trees (“stags” in Australia) are critical for wildlife in forests throughout the world. Dynamics of stag recruitment and retention are an interaction of tree mortality, size, deterioration rate, human intervention, and variables related to the structure and physiognomy of the forest. Historically in Australia and elsewhere, timber management involved the removal of stags and resul...

2002
G. Andrew Stainback Janaki R. R. Alavalapati

1 Graduate Student, School of Forest Resources and Conservation, University of Florida, Gainesville, FL 32611-0410 2 Assistant Professor, School of Forest Resources and Conservation, University of Florida, Gainesville, FL 32611-0410 This study investigates the impact of carbon subsidies and taxes on the optimal forest rotation and soil expectation value for slash pine forest in Florida. We use ...

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