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Showing items 1 through 9 of 30.
  1. Library Resource
    Journal Articles & Books
    December, 2010

    Estimates of the percent of Earth's land surface that has either been transformed or degraded by human activity range between 39 and 50 percent, with agriculture accounting for the vast majority of these changes. Although much of the focus of research on land use and cover change in the tropics has been on deforestation, ongoing socioeconomic changes both locally and globally have made land transitions in the tropics extremely fluid. In addition, feedbacks between land cover change and human behavior constrain the extent and trajectories of land transitions.

  2. Library Resource
    Journal Articles & Books
    December, 2010
    Oceania

    The Northwest Forest Plan was implemented in 1994 to protect habitat for species associated with old-growth forests, including Northern Spotted Owls ( Strix occidentailis caurina) in Washington, Oregon, and northern California (U.S.A.). Nevertheless, 10-year monitoring data indicate mixed success in meeting the ecological goals of the plan.

  3. Library Resource
    Journal Articles & Books
    December, 2010

    Successful captive breeding of endangered Island foxes, which essentially saved San Miguel Island foxes Urocyon littoralis littoralis and Santa Rosa Island foxes Urocyon littoralis santarosae from extinction, was facilitated by collaboration between land-management agencies and the zoo community. Although the captive breeding was conducted in situ (on-island) by the agencies, participating zoos offered skill sets and experience that the agencies lacked.

  4. Library Resource
    Journal Articles & Books
    December, 2010
    Canada

    Feedbacks between climate warming and fire have the potential to alter Arctic and sub-Arctic vegetation. In this paper we assess the effects and interactions of temperature and wildfire on plant communities across the transition between the Arctic and sub-Arctic. Mackenzie Delta region, Northwest Territories, Canada. We sampled air temperatures, green alder (Alnus viridis ssp. fruticosa) cover, growth, reproduction and age distributions, and overall plant community composition on burned and unburned sites across a latitudinal gradient.

  5. 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.

  6. Library Resource
    Journal Articles & Books
    December, 2010

    This article examines Finnish consumer ethoses and the moral rules that include them. We argue that Finnish consumers legitimize their consumer and spending practices, and constitute themselves as moral agents through three culturally dominant and historically constructed consumer ethoses: agrarianism, economism and green consumerism. The material of the study consists of 53 consumer life stories collected between September 2006 and May 2007 using a writing competition.

  7. Library Resource
    Journal Articles & Books
    December, 2010
    Japan

    This study was conducted to determine the reproductive characteristics of Barbarea vulgaris under different disturbance regimes (mowing and tilling) in two different habitats: a levee and a wheat field. On the levee, 77 of the 114 individuals that had had their floral stalks removed by the first mowing produced new rosettes at the basal part of the stem during the same growing season. The plants that were mowed four times per year had a significantly greater survival rate than the plants that were mowed twice per year.

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

    The lack of concrete instances in which conservation and development have been successfully merged has strengthened arguments for strict exclusionist conservation policies. Research has focused more on social cooperation and conflict of different management regimes and less on how these factors actually affect the natural environments they seek to conserve. Consequently, it is still unknown which strategies yield better conservation outcomes?

  9. Library Resource
    Journal Articles & Books
    December, 2010

    Because habitat loss due to urbanization is a primary threat to biodiversity, and land-use decisions in urbanizing areas are mainly made at the local level, land-use planning by municipal planning departments has a potentially important--but largely unrealized--role in conserving biodiversity.

  10. Library Resource
    Journal Articles & Books
    December, 2010
    Global

    As the demands for food, feed and fuel increase in coming decades, society will be pressed to increase agricultural production - whether by increasing yields on already cultivated lands or by cultivating currently natural areas - or to change current crop consumption patterns. In this analysis, we consider where yields might be increased on existing croplands, and how crop yields are constrained by biophysical (e.g. climate) versus management factors. This study was conducted at the global scale.

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