Analyzes the economics of alternative allocations of forested land for uses (dominant-use vs. multiple use) to ensure the survival of a viable population of a forest-dependent species, e.g. the orangutan. The alternatives are (1) setting aside a sufficient fully protected portion of the forest...

Indicates some of the different concepts of sustainable economic development and raises queries about how much present generations are concerned with future generations. A variety of conditions (ranging from very weak to very strong) have been suggested for achieving sustainable development....

Biodiversity is usually regarded as an asset or resource, the stock of which is partly natural and partly determined by humans. Humans both subtract from and add to this stock and consequently, the change in the stock is heterogeneous. This heterogeneity is not taken account of by some authors...

Different economic methods are being used to estimate the economic benefits generated by nature (wildlife) tourism. The most prominent of these are economic valuation analysis and economic impact analysis. These methods often provide divergent and conflicting estimates of the economic benefits...

After touching on the concerns of natural scientists about biodiversity loss, this article argues that it is a mistake to believe that there are only losses of biodiversity. The process of changes in the stock of biodiversity is more complex. Furthermore, it is pointed out that not all genetic...

Some wildlife species are agricultural pests (or otherwise a problem) but their populations are often valued by other than agriculturalists or by those not adversely affected by them directly. For non-farmers, the population levels of such wildlife are frequently pure public goods. This is one...

Ecosystems supply a wide variety of valued commodities, including ecological services. Valuing these commodities and determining the implications of their valuation for the optimal management of ecosystems is challenging. This paper considers the optimal spatial use of forest ecosystems given...

Each year during the turtle watching season, Mon Repos turtle rookery in Queensland attracts many ecotourists interested in seeing sea turtles nesting or hatching. As part of their visit, visitors are able to learn about the biology of and threats to marine turtles. A sample of visitors were...

Provides some background on concerns about the sustainability of agriculture, outlines and discusses views about what constitutes sustainable agriculture and contrasts the sustainability of modern industrialised agriculture with that of traditional agriculture. Then the question is considered...

Summarises some of the predicted natural consequences of increasing concentrations of greenhouse gases in the atmosphere. Changes in temperature, climates, physical and chemical impacts on the biosphere as well as biodiversity loss are considered. Then some of the expected social and economic...