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Showing items 1 through 9 of 372.
  1. Library Resource
    Journal Articles & Books
    December, 2015
    Australia

    AIM: Prescribed fire is a common land management for reducing risks from unplanned fires. However, the universality of such effectiveness remains uncertain due to biogeographical variation in fuel types, climatic influences and fire regimes. Here, we explore biogeographical patterns in the effectiveness of prescribed fire by calculating leverage (the reduction in unplanned area burnt resulting from recent previous area burnt) across south‐eastern Australia over a 25 year period. LOCATION: The 30 bioregions of south‐eastern Australia.

  2. Library Resource
    Journal Articles & Books
    December, 2011

    Insular Southeast Asia experienced the highest level of deforestation among all humid tropical regions of the world during the 1990s. Owing to the exceptionally high biodiversity in Southeast Asian forest ecosystems and the immense amount of carbon stored in forested peatlands, deforestation in this region has the potential to cause serious global consequences. In this study, we analysed deforestation rates in insular Southeast Asia between 2000 and 2010 utilizing a pair of 250 m spatial resolution land cover maps produced with regional methodology and classification scheme.

  3. Library Resource
    Journal Articles & Books
    December, 2008
    Australia

    Woody plants have been increasing in many woodland and savanna ecosystems owing to land use changes in recent decades. We examined the effects of encroachment by the indigenous shrub Leptospermum scoparium (Myrtaceae) on herb-rich Eucalyptus camaldulensis woodlands in southern Australia. Species richness and compositional patterns were examined under the canopy of L. scoparium and in surrounding open areas to determine the species most susceptible to structural changes. Richness was significantly lower in areas of moderate to high L.

  4. Library Resource
    Journal Articles & Books
    December, 2008
    New Zealand

    1. A spatially-extensive data set of stream macroinvertebrate communities from 49 northern New Zealand sites sampled over a 10-year period was analysed to assess relationships between the environment (catchment land-cover, landscape position and regional-scale weather patterns), and (i) community persistence and stability based on the constancy of species occurrence (presence-absence) and abundance (per cent composition), respectively and (ii) the temporal variability of various community condition metrics. 2.

  5. Library Resource
    Journal Articles & Books
    December, 2009
    Europe

    The Little Bustard Tetrax tetrax is one of the most threatened steppe bird species in Europe, due mainly to agricultural intensification. Despite the relative importance of the Iberian population (approximately 50% of the global population) little is known about its dynamics and trends, especially in core distribution areas. This study evaluates the influences of meteorological factors and land management on the oscillations and medium-term trends of two Little Bustard populations in Central Spain.

  6. Library Resource
    Journal Articles & Books
    December, 2014
    Indonesia

    AIM: Deforestation and climate change are two of the most serious threats to tropical birds. Here, we combine fine‐scale climatic and dynamic land cover models to forecast species vulnerability in rain forest habitats. LOCATION: Sulawesi, Indonesia. METHODS: We sampled bird communities on four mountains across three seasons in Lore Lindu National Park, Sulawesi, Indonesia (a globally important hotspot of avian endemism), to characterize relationships between elevation and abundance. Deforestation from 2000 to 2010 was quantified, and predictors of deforestation were identified.

  7. Library Resource
    Journal Articles & Books
    December, 2009

    This article develops a framework to examine the ex ante benefits of transgenic research on drought in eight low-income countries, including the benefits to producers and consumers from farm income stabilization and the potential magnitude of private sector profits from intellectual property rights (IPRs). The framework employs country-specific agroecological-drought risk zones and considers both yield increases and yield variance reductions when estimating producer and consumer benefits from research.

  8. Library Resource
    Journal Articles & Books
    December, 2010
    India

    In spatial ecology, detailed covariance analyses are useful for investigating the influences of landscape properties on fauna and/or flora species. Such ecological influences usually operate at multiple scales, involving biological levels from individual to group, population or community and spatial units from field to farms and regions.

  9. Library Resource
    Journal Articles & Books
    December, 2006
    Africa

    Contemporary discourse on land in Africa is polarized between advocates of tenure reform through state registration of individual titles to land and others who claim that customary or 'communal' tenure is the only check against landlessness among the poor in the African countryside, and that 'pro-poor' land policy should therefore strengthen customary rights to land.

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