Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 110.
  1. Library Resource
    Articles et Livres
    décembre, 2013

    Land use change is one of the main stress factors on ecosystems near urban areas. We analysed land use dynamics within Xochimilco, a World Heritage Site area in Mexico City. We used satellite images and GIS to quantify changes in land use/land cover (LULC) from 1989 to 2006 in this area, and a Markov projection model to simulate the impact of different management scenarios through to 2057. The results show an alarming rate of urbanisation in 17 years. LULC change runs in one direction from all other land use categories towards urban land use.

  2. Library Resource
    Articles et Livres
    décembre, 2013

    We address the possible outcomes of combining environmental taxes and environmental planning in managing non-renewable resources such as aggregates. We empirically investigate resource taxation issues by focusing on aggregate extraction policy in two large northern Italian regions, Lombardy and Emilia-Romagna. The evidence shows that environmental planning, in addition to economic instruments, is needed to shape and monitor environmental policies. We highlight that the complementarity of land use planning and economic instruments can be a key driver of sustainability performances.

  3. Library Resource
    Articles et Livres
    décembre, 2012

    Increased development around Minnesota's lakes and their respective watersheds has degraded lake health in counties surrounding the St. Paul and Minneapolis metro areas. Confronted with the implications of degraded lakes, such as loss of property values and declining recreational experiences, lakefront landowners, and those using the lake for recreation, are increasingly looking for meaningful ways to engage in activities to improve lake water quality.

  4. Library Resource
    Articles et Livres
    décembre, 2012
    Brésil

    Amazonia became a target area for Payment for Ecosystem Services (PES) initiatives in deforestation. We analysed the implementation of a PES scheme in Acre (Brazil) by taking into account land use heterogeneity in an agricultural frontier. Justified by the modernisation of deforestation control policies, the programme promotes agricultural intensification through fire-free practices. In this way, the PES tends to focus on long-established settlements, where farmers are wealthier and the landscape is dominated by pasture. Agricultural intensification may be adapted to foster reforestation.

  5. Library Resource
    Articles et Livres
    décembre, 2014
    États-Unis d'Amérique

    ‘Food sovereignty’ must necessarily encompass ‘seed sovereignty’. Corporate appropriation of plant genetic resources, development of transgenic crops and the global imposition of intellectual property rights are now widely recognized as serious constraints on the free exchange of seeds and the development of new cultivars by farmers, public breeders and small seed companies. In response, an Open Source Seed Initiative (OSSI) has been launched in the United States to apply legal mechanisms drawn from the open source software movement to plant breeding.

  6. Library Resource
    Articles et Livres
    décembre, 2014

    In recent years, the concept of ‘food sovereignty’ has gained increasing ground among grassroots groups, taking the form of a global movement. But there is no uniform conceptualization of what food sovereignty constitutes. Indeed, the definition has been expanding over time. It has moved from its initial focus on national self-sufficiency in food production (‘the right of nations’) to local self-sufficiency (‘the rights of peoples’). There is also a growing emphasis on the rights of women and other disadvantaged groups, and on consensus building and democratic choice.

  7. Library Resource
    Articles et Livres
    décembre, 2012
    Bangladesh

    In Bangladesh, extensive common pool fisheries exist in the wet season on private lands in the floodplains. This study investigated the trend in year-round enclosure of these seasonal commons for private aquaculture and the impacts of this practice. The floodplain area enclosed for aquaculture was found to be growing at 30–100% a year. Enclosures are organised by individual landowners, informal groups or companies that lease in land. Aquaculture in enclosures produces more fish than capture fisheries, but input costs are high.

  8. Library Resource
    Articles et Livres
    décembre, 2012
    États-Unis d'Amérique

    Land ownership in the United States is understood as a bundle of sticks representing rights to sell, lease, bequeath, mine, subdivide, develop, and so forth. The right of exclusion allows owners to prevent others from exercising a right of access. Historically, access and then exclusion contributed to a sense of self-determination and personal freedom in the American landscape. Governing agencies reserve four rights for their use: condemnation, regulation, taxation, and escheat.

  9. Library Resource
    Articles et Livres
    décembre, 2012

    Landscape metrics are used in landscape ecology to quantify landscape characteristics related to structure, function and change by quantifying the structure and distributional pattern of landscape elements such as plants, animals and other physical landscape features. To date, there has been little published research on landscape metrics that include social perceptions of landscape. In this paper, we introduce the concept of social landscape metrics that quantify human perceptions of place resulting from the use of public participation geographic information systems (PPGIS).

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