Résultats de la recherche
Showing items 1 through 9 of 5.
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Library Resource
Publication évaluée par des pairs
Climate warming and human actions both have negative impacts on the land cover of Mongolia, and are accelerating land degradation. Anthropogenic factors which intensify the land degradation process include mining, road erosion, overgrazing, agriculture soil erosion, and soil pollution, which all have direct impacts on the environment. In 2009–2010, eroded mining land in Mongolia increased by 3,984.46 ha., with an expansion in surrounding road erosion. By rough estimation, transportation eroded 1.5 million ha. of land.
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Library Resource
Documents et rapports de conférence
Asie occidentale, Jordanie
Water scarcity and land degradation are widespread problems that affect agricultural productivity, food security and environmental quality in several parts of the world, particularly in the dry areas. Sustainable management of soil and water is necessary to optimize the use of limited rainwater for crop production and to decrease soil erosion. One management option is utilizing rainfall more efficiently through water harvesting. In arid areas, different types of water harvesting techniques (WHT) are being developed by
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Library Resource
Drylands are characterized by physical water scarcity, often associated with land degradation and
desertifi cation. Other factors that contribute to these problems include high population densities,
unwise agricultural practices and overgrazing. However, while desert ecosystems are fragile and
vulnerable and can collapse in the short term, given the right conditions and protection, these
areas also have a great potential for recovery. Examples of the recovery of areas have led to the
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Library Resource
En Aisén, Chile, se compararon distintos estadios de degradación antropogénica de la vegetación arbustiva original en una serie de distintos manejos de pastoreo, utilizando los indicadores ecológicos vegetales de Ellenberg para los factores de luz, temperatura del aire y de reacción, nitrógeno y humedad del suelo. El matorral de ñirre primario se consideró como inicio de la serie. Se trabajó con tablas de vegetación separadas para cada estado de degradación.
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Library Resource
Documents de politique et mémoires
La desertificación/degradación de la tierra raramente está considerada como un tema económico, y la sequía rara vez como un desastre. Dado que la desertificación, la degradación de la tierra y la sequía son procesos lentos y sigilosos, su avance es subrepticio, y nos inducen a subestimar sus efectos socioeconómicos.
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