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Several of the major processes that result in N loss from soil (nitrification, ammonia volatilization, and denitrification) discriminate against ¹⁵N and fractionate the stable N isotopes, thus δ¹⁵N of ecosystem components has been suggested as an indicator of ecosystem N leakiness. This concept has been applied more successfully to native systems (primarily forest) than to managed systems where N inputs are greater and N cycling processes have potentially been modified.
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Transferable offsets are a means of mitigating the adverse environmental impacts of resource developments. Based on insights from institutional economics, there are three elements that need to be in place for offsets to be effective: (1) property rights over the mitigating good can be defined and assigned; (2) a difference exists between the marginal cost of supplying the mitigating good and the community's marginal value for it; and (3) the transaction costs of exchanging the mitigating good are less than the trade benefit.
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Numerous scholars agree that to integrate stakeholder demands into forest management is the central challenge facing forestry science. A necessary step is to translate public views and expectations into forest management techniques. This study uses document analysis and in-depth interviews to understand the values and expectations of New Zealandâs indigenous people (MÄori) who have exotic species forests planted on their ancestral land.
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Several approaches have been proposed for accounting for temporary carbonsequestration in land-use change and forestry projects that are implemented to offsetpermanent emissions of carbon dioxide from the energy sector. In a previous paper,we evaluated the incentives provided by some of these approaches. In this paper, weinvestigate further what we call the “ideal” accounting system, where the forest ownerwould be paid for carbon sequestration as the service is provided and redeempayments when the forest is harvested and carbon is released back into theatmosphere.
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Burnt area data, derived from the National Oceanic and Atmospheric Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) imagery, are validated in 11 regions of arid and semi-arid Australia, using three separate Landsat-derived burnt area data sets. Mapping accuracy of burnt extent is highly variable between areas and from year to year within the same area. Where there are corresponding patches in the AVHRR and Landsat data sets, the fit is good. However, the AVHRR data set misses some large patches.
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Documentos de conferencias e informes
The New Zealand Emissions Trading Scheme (NZ ETS) was introduced through the Climate Change Response Act in September 2008 and remains in force. The forestry sector has been directly affected by the NZ ETS since 1 January 2008 and stationary energy, liquid fuels and industrial emissions have been affected since 1 July 2010. When it is fully implemented in 2015 it will cover all sources and gases including agricultural emissions.
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When entitlements to access water in fully allocated river and aquifers are specified in a manner that is inconsistent with the ways that water arrives, flows across and flows through land, inefficient investment and water use is the result. Using Australia's Murray Darling Basin as an example, this paper attempts to reveal the adverse economic and water management consequences of entitlement and water sharing regime misspecification in regimes that allow water trading. Markets trade water products as specified.
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Land-use and vegetation cover have been linked to the nutrient levels (nitrogen, phosphorus) of surface waters in several countries. However, the links generally relate to streams and rivers, or to specific types of standing water, for example shallow lakes in a geologically defined region.
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A prototype web-based spatial information management tool (called eFarmer) was tested for its useability and usefulness by 46 Land Managers and 5 extension staff in Victoria, Australia. Participants had a range of enterprises (dairy, beef/sheep grazing, cropping, lifestyle land use), property sizes and computer ownership and expertise. A follow up study was conducted with 12 dairy farmers, where features regarding assessment of nutrient losses from paddocks (Farm Nutrient Loss Index, FNLI) were added to eFarmer.
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Extensive research has been conducted globally into conceptual frameworks for ecosystem services, the most notable being the Millennium Ecosystem Assessment (Millennium ecosystem assessment: ecosystems and human well-being; a framework for assessment. World Resources Institute, Washington, DC, pp 51, 53-55, 2005).
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