Aquilaria malaccensis (Thymelaeaceae) is the principal source of gaharu, one of the most valuable tropical forest products in international trade. Despite its economic importance, the autecology of this species is virtually unknown. Seedling growth and survival of A. malaccensis was monitored over a 15-month period in natural forest in West Kalimantan. Mean height growth rate was 21.2 + 2.3 cm year1, and was positively related to light availability (i^= 0.79, p < 0.001), but unrelated to distance to the nearest mature tree or seedling density. By the end of the observation period, fewer than 20% of seedlings surveyed initially were still alive, trampling and cutting being one of the main causes of mortality. A nursery experiment examined the influence of soil (two treatments), light availability (four treatments) and seedling density (four treatments) on growth. Although a decrease in irradiance was associated with significantly (p < 0.01, t - test) lower values for height and stem diameter, seedlings were able to survive under the low light treatment. Lower height growth rates and leaf increment were observed with higher seedling densities on the more fertile soil; no such effects of density were observed on the relatively infertile soil. The implications of these results for the sustainable management of A. malaccensis are discussed.Resource Type: Journal Papers
Several populations of Fitzroya cupressoides (Mol.) Johnst. (Cupressaceae, common name 'alerce'), a threatened, long-lived conifer endemic to southern Chile and parts of Argentina, have recently been found in Chile's Central Depression, where the species was thought to have been extirpated. The objective of this study was to determine, on eight sites in the Depression, Fitzroya's regeneration behavior in relation to disturbance, its substrate and cover requirements for establishment, and whether regeneration is by seed or vegetative means.
Despite substantial environmental differences between the Central Depression and the portions of the Coastal and Andean Cordilleras where Fitzroya is found, populations in all three regions show striking similarities in their regeneration and stand dynamics. Fitzroya's longevity and at times abundant regeneration provide the biological basis for its persistence in Chile's Central Depression.Resource Type: Journal Papers
Swietenia macrophylla King (Meliaceae: Swietenioideae) provides one of the premier timbers of the world. The mahogany shoot borer Hypsipyla robusta Moore (Lepidoptera: Pyralidae) is an economically important pest of S. macrophylla throughout Asia, Africa and the Pacific. No viable method of controlling this pest is known. Previous observations have suggested that the presence of overhead shade may reduce attack by H. robusta, but this has not been investigated experimentally. This research was therefore designed to assess the influence of light availability on shoot-borer attack on S. macrophylla, by establishing seedlings under three different artificial shade regimes, then using these seedlings to test oviposition preference of adult moths, neonate larval survival and growth and development of shoot borer larvae.
The results indicate that shading of mahogany seedlings may reduce the incidence of shoot borer attack, by influencing both oviposition and larval development. The establishment of mahogany under suitable shade regimes may therefore provide a basis for controlling shoot borer attack using silvicultural approaches.Resource Type: Journal Papers
With biodiversity still in rapid decline, effective and policy relevant indicators are urgently needed. The current indicator framework of the Convention on Biological Diversity (CBD) is widely influential and includes many good measures. However, each of the CBD indicators presently exists in isolation. It is not clear how they relate to each other, nor how they can be used to assess and inform policies for stemming biodiversity loss.
Although Asian bamboo species constitute a non-timber forest product of major cultural and economic importance, no detailed regional assessment of their distribution patterns has previously been made. To assess the potential of the existing bamboo species distribution data for production of regional mapping tools for planning the conservation of forest-based biodiversity, data on bamboo distribution and forest cover were combined. Over 1000 bamboo species from 60 genera of woody bamboos were incorporated, allowing the mapping of individual species or groups of species and genera, along with potential species richness and biodiversity hotspots. Over 6.3 million km2 of Asian forest potentially contains bamboo, with highest densities indicated from northeastern India through Burma to southern China, and through Sumatra to Borneo. The highest figures for potential species richness (144 spp per square km) were recorded in forests of south China, including Hainan Island. Despite substantial inadequacies and inconsistencies in knowledge of the taxonomy and distribution of bamboo species, this approach may provide a valuable tool for planning in situ conservation of forest biodiversity.Resource Type: Journal Papers
This study makes use of extensive spatial datasets, previously unavailable, to provide a comprehensive assessment of the conservation status of biodiversity throughout the tropics. The extent to which potential habitats and closed moist forests are represented in protected areas is assessed. Priorities for conservation action are identified on the basis of a country's relative importance for a given habitat and the extent to which it is protected. National importance for biodiversity is also examined in relation to natural and foreign investments in protected areas.Resource Type: Reports
This paper reviews the potential for multiple benefits that might be attained by reducing emissions from deforestation (RED) through a mechanism developed under the UNFCCC. These benefits are relevant to national commitments under several environmental and sustainable development conventions and instruments, and may not be directly correlated with reduced carbon emissions. The design of the mechanism and its implementation will affect the degree to which these other benefits, such as biodiversity conservation, livelihoods, watershed protection and other ecosystem goods and services, are obtained.Resource Type: Reports
This paper provides an overview of the issues surrounding and opportunities for achieving ‘multiple benefits’ from Reducing Emissions from Deforestation and Forest Degradation in developing countries (REDD). The UN‐REDD Programme understands the term ‘multiple benefits’ to include both the ecosystem and social benefits of REDD.
It is an output of the International Support Functions component of the UN‐REDD Programme, relating specifically to the development of output 3.2: ‘Tools to encourage the capture of ecosystem service co‐benefits developed’,focussing on the ecosystem aspects of multiple benefits.Resource Type: Reports
This publication provides a concise account of the available information and current issues facing mangroves in East African countries. It comprises a regional summary of the factors and activities that affect mangroves across East Africa, and a series of reports that focus on South Africa, Mozambique, Madagascar, Tanzania, the Seychelles, Kenya and Somalia. These country summaries include details of mangrove-related legislation, industries associated with and involving mangroves, and details of how mangroves are utilized by local human communities. Information on marine protected areas that cover mangroves is also provided as are regional and national scale maps.Resource Type: Reports
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