Big-leaf mahogany was studied on nine mixed-species stands that became established naturally between 2 and 75 years ago after catastrophic disturbances (hurricane blowdown, fire, or bulldozer clearing). More than 50% of adult big-leaf mahogany trees had survived a severe hurricane, leaving 2.8 seed trees ha-1. After fire, 29% to 100% of adult Mahogany trees survived, leaving an average of 1.4 seed trees ha 1. Thirty or more years later, postdisturbance mahogany trees were found at densities of 18 ha-1 after fire, as compared to 6 ha-1 after a hurricane.

This document provides suggestions for an overall strategic framework to achieve implementation of the Code of Practice for Forest Harvesting in Asia-Pacific. Once implemented the Code will optimise the benefits offered by the region's natural production forests and contribute to their sustainable management for the continuing benefit of the community as a whole. The goals and objectives of this Regional Strategy are expressed as eight strategies for implementation. (1) Encourage appropriate public and political support for implementation of the Code.

The study was caried out in Peru in 2003 and 2004. The study aims to increase the chances of future success of forest rehabilitation efforts by identifying the strategies that best contribute to long-term sustainability with minimal negative effects on stakeholders. Specifically, the study derives strategic lessons from the past and ongoing initiatives. The study identifies and disseminate the most promising approaches and incentives for rehabilitation in different ecological and socio-economic situations.

In July 1996, with assistance from FAO, USAID, and the USDA Forest Service, CIFOR offered its first International Research Training Seminar on Reduced-Impact Timber Harvesting and Natural Forest Management. Participants were drawn from ten countries and represented disciplines ranging from silviculture and hydrology to wildlife biology. Throughout the workshop, field exercises were integrated with classroom activities, initially in the experimental forest plantation near CIFOR's headquarters, and later at an industrial timber concession in East Kalimantan.

Much of mainland Southeast Asia's primary forest has been converted into secondary vegetation types in the past several decades. In the Lower Mekong Subregion, nearly 100 million ha of forest were significantly altered or removed, with depletion in terms of areal percent most severe in Thailand and Vietnam. Timber extraction and conversion of forestland to agriculture are the two principal causes of forest degradation in the region. Logged sites are often later occupied by migrant homesteaders. The current regional focus of logging has shifted to Laos, Cambodia and Myanmar.

Forest resources share attributes with many other resource systems that make difficult their governance and management in a sustainable, efficient and equitable manner. Destruction or degradation of forest resources is most likely to occur in open-access forests where those involved, or external authorities, have not established effective governance. Conventional theories applied to forest resources presumed that forest users themselves were incapable of organizing to overcome the temptations to overharvest.

With past and continued destruction of primary forest worldwide, secondary forest constitute a large and growing component of forest cover and have been found to be very important for a wide range of goods and services. Despite its widespread usage, there is considerable ambiguity with regard to the meaning of the term 'secondary forest' and the different forest types it encompasses.

Swidden farming is the main agent of conversion of primary forests to secondary forests in the highlands of mainland Southeast Asia, but there is a deterioration and decline of the practice with land use intensification. The population growth in northern Thailand has forced lowland farmers practising permanent wet rice cultivation to turn to short rotation swidden in the foot hill zone. Highland swidden agriculturists are adopting more intensive forms of swidden or are shifting to permanent farming.