This issue of Unasylva focuses on the challenges facing mountain development into the twenty-first century.

Revue internationale des forts et des industries forestires

An international journal of forestry and forest industries

Revue internationale des forts et des industries forestires

An international journal of forestry and forest industries

La Evaluación de los Recursos Forestales Mundiales (ERF 2000) recientemente publicada, se basó en un esfuerzo intensivo de cinco años realizado por la FAO en cooperación con los organismos nacionales de casi todos los países del mundo, un gran número de centros de investigación e instituciones académicas y una serie de organizaciones internacionales, regionales y no gubernamentales.

Revue internationale des forts et des industries forestires

En este nmero de Unasylva se considera el futuro de la teca, con especial atencin a las plantaciones.

Miombo woodlands in Southern Africa are experiencing accelerated changes due to natural and anthropogenic disturbances. In order to formulate sustainable woodland management strategies in the Miombo ecosystem, timely and up-to-date land cover information is required. Recent advances in remote sensing technology have improved land cover mapping in tropical evergreen ecosystems. However, woodland cover mapping remains a challenge in the Miombo ecosystem.

While geographers and economists regularly work together on the development of land-use and land-cover change models, research on how differences in their modelling approaches affects the results is rare. Answering calls for more coordination between the two disciplines in order to build models that better represent the real world, we (two economists and a geographer) developed an economically grounded, spatially explicit, agent-based model to explore the effects of environmental policy on rural land use in New Zealand.

A landscape perspective is generally recognized as essential for conservation biology. The main underlying reason is that species respond to features of the landscape at various spatial scales, for example habitat area, connectivity, and matrix habitats. However, there is also an “historical” component of a landscape perspective, which has not received similar attention. The underlying reasons for historical effects are that humans have influenced landscapes during several millennia and that species and communities may respond slowly to land use change.