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Showing items 1 through 9 of 106.
  1. Library Resource
    Journal Articles & Books
    December, 2007
    Europe

    In Europe, grassland is one of the dominant forms of land use. Within 20 years, the area of permanent grasslands and pastures in Western Europe has declined by 12%. Semi-natural grasslands are often hot spots of biodiversity and are threatened both by intensive farming and by the abandonment of farmland in marginal areas. In this review, we show that biodiversity, climate change, C sequestration and farming systems issues are highly interconnected in grassland ecosystems.

  2. Library Resource
    Conference Papers & Reports
    December, 2007
    Spain

    La dehesa es un ecosistema agroforestal único que aúna un óptimo rendimiento económico con una menor incidencia en el medio. En la Península Ibérica hay unas 500.000 hectáreas de dehesas concentradas en Andalucía, Castilla y León, Extremadura, Castilla La Mancha y Madrid. Las razas autóctonas son las que, por su rusticidad y adaptación, mejor aprovechan y conservan la dehesa.

  3. Library Resource
    Journal Articles & Books
    December, 2007
    Spain

    Changes of vegetal cover in the Aragonese western Pyrenees are shown throughout the last 50 years. The evolution is characterized by a generalised revegetation process with an advance of shrubs and forests. The medium and low slopes show the most intense revegetation as a consequence of the agricultural abandonment and the decrease of the livestock pressure. Nevertheless, few vegetation changes are recorded in cultivated lands and the pastures located above timberline.

  4. Library Resource
    Conference Papers & Reports
    December, 2007
    Spain

    La raza Castellana se halla distribuida por distintas áreas de la Comunidad de Castilla y León, si bien la mayor parte de su censo se encuentra en comarcas del oeste de la provincia de Zamora. Raza de doble actitud carnicera y lechera, su explotación se halla orientada mayoritariamente a la producción de carne, si bien los escasos rebaños inscritos en el libro genealógico se hallan dedicados a la producción lechera.

  5. Library Resource
    Journal Articles & Books
    December, 2007
    United States of America, Japan, China, India, Russia

    Much is reported about the destruction of natural forests and the consequences for global warming, while on the other hand, exotic plantations in some regions struggle to gain public acceptance. The earth's population is projected to rise to around 9 billion by 2050, with a concomitant increase in demand for forest products. Inevitably, forests in general, and managed forest in particular, will be called on to provide an ever-increasing proportion of local supplies and the international wood trade.

  6. Library Resource
    Conference Papers & Reports
    December, 2007
    Spain

    La denominada "vaca Monchina" raza en peligro de extinción se encuentra distribuida en la Comunidad Autónoma de Cantabria y zonas limítrofes. En ella se engloban un conjunto de animales que manifiestan variabilidad según la capa: Morena (Castaña y Avellana), Marina y Barrida, contando además con un censo muy reducido de animales y con un porcentaje de hibridación con otras razas variable, lo que dada la variabilidad antes aludida hace en ocasiones difícil la asignación de un individuo a la raza.

  7. Library Resource
    Conference Papers & Reports
    December, 2007
    Spain

    En el marco del Proyecto INIA RZ2004-00023-00-00, titulado: "Evaluación de los Recursos Genéticos Equinos de aptitud cárnica en peligro de extinción: caracterización, desarrollo de estrategias que minimicen el parentesco y la erosión genética y diseño y creación de un banco de germoplasma", se contempla como objetivo principal, conocer la situación real censo, estructura de la población, caracterización morfo-estructural, sistema de cría, variabilidad genética, etc.

  8. Library Resource
    Policy Papers & Briefs
    December, 2007
    Slovakia

    The breed of the hen Oravka was created by crossbreeding of the regional hens with Rhode Island, Wyandotte and New Hampshire. Oravka and Bantam Oravka were recognised as breeds in 1990. The original breeding goal to create a dual purpose poultry breed with good egg production, growth ability and adaptability on altemative outdoor rearing was fulfilled during the individual stages of breeding programme, which started in the 1950. This year, 40 controlled breeds of Oravka with 56 males and 502 females were registered.

  9. Library Resource
    Policy Papers & Briefs
    December, 2007
    Slovenia

    In most mammalian species, body mass is one of the key factors affecting an individual's fitness. It is therefore important to know the causes of its variability. The present paper analyses the influences of habitat structure and other environmental factors on body mass in red deer. The research is based on data sets concerning 3,920 culled red deer from the entire Slovenia, which are geo-referenced within a kilometer spatial accuracy, and on 28 spatially explicit raster layers of population density, habitat structure variables (e.g.

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