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Soil erosion monitoring and its implication in a limestone land suffering from rocky desertification in the Huajiang Canyon, Guizhou, Southwest China

Journal Articles & Books
Décembre, 2013
Chine

Over the past decades, the vast limestone mountain areas in southwestern China have suffered greatly from karst rocky desertification (KRD), which is a unique type of desertification caused by irrational land-use practices and has drawn increasing attention of international academic community. Characterizing soil erosion in this region is the key to understanding the escalating KRD problem and finding solution to it. The authors applied leveling method to study soil erosion process in the Huajiang Karst Canyon area between 1999 and 2003, and tried to relate it to KRD expansion.

Environmental degradation assessment in arid areas: a case study from Basra Province, southern Iraq

Journal Articles & Books
Décembre, 2013
Iraq

Evaluation of recent land degradation affecting Basra Province, Iraq, resulted in the identification of five prominent environmental degradation processes: desertification, secondary salinization, urbanization, vegetation degradation, and loss of wetlands.

Quantifying the synergistic effect of the precipitation and land use on sandy desertification at county level: A case study in Naiman Banner, northern China

Journal Articles & Books
Décembre, 2013
Chine

Assessing the driving forces of sandy desertification is fundamental and important for its control. It has been widely accepted that both climatic conditions and land use have great impact on sandy desertification in northern China. However, the relative role and synergistic effect of each driving force of sandy desertification are still not clear. In this paper, an indicator named as SI was defined to represent the integrated probability of sandy desertification caused by land use.

Evolution of major environmental geological problems in karst areas of Southwestern China

Journal Articles & Books
Décembre, 2013
Chine

Karst terrains are generally regarded as a fragile and vulnerable environment. China’s karst is mainly developed in pre-Triassic, old-phase, hard, compact carbonate rock. The lack of soil cover in bare karst land can enhance desertification. Its underground drainage system can aggravate both drought and flooding problems; the interconnected surface and subsurface conditions allow for easy contamination by pollutants.

Property rights and climate change vulnerability in Turkish forest communities: a case study from Seyhan River Basin, Turkey

Journal Articles & Books
Décembre, 2013
Turquie

Turkey is expected to experience significant climate change, including increased temperatures and desertification. As these changes affect forestry, agriculture and animal husbandry, they threaten the livelihoods of forest communities across the country. In addition, other, institutional factors such as the property regime can act in tandem with physical stressors to increase communities’ overall vulnerability to climate change.

phylogenetic network of wild Ussurian pears (Pyrus ussuriensis Maxim.) in China revealed by hypervariable regions of chloroplast DNA

Journal Articles & Books
Décembre, 2013
Chine
Mongolie

In order to understand the genetic diversity of wild Ussurian pears in China, chloroplast DNA (cpDNA) of 186 wild accessions from 12 populations in Inner Mongolia, Heilongjiang and Jilin Provinces and 51 Chinese and European pear cultivars including Pyrus ussuriensis, Pyrus pyrifolia, Pyrus bretschneideri, Pyrus sinkiangensis and Pyrus communis were investigated. Each accession was classified into one of three types (types A, B and C) based on two large deletions in the hypervariable regions between the accD–psaI and rps16–trnQ genes.

Differences in Soil Properties Between Irrigation and Cropping Sequences in the Thar Desert of India

Journal Articles & Books
Décembre, 2013
Inde

Watering is known to convert deserts into oases. However, information on how irrigation brings changes in physical and chemical properties of soils in a desert biome is not yet known, though pertinent to land use planning. This study reports influence of irrigation and cropping sequence on physico-chemical properties of soils in the Thar Desert, Rajasthan, India.

Analyzing causes of desertification in Bayankhangai soum, Tuv province, central Mongolia

Journal Articles & Books
Décembre, 2013
Mongolie

The aim of this paper was to develop a simple assessment for precisely appraising the status and trends of desertification in Bayankhangai soum. The Bayankhangai soum is in central Mongolia, which is a part of the Hustai National Park, and this soum (administrative subdivision) belongs to the Orhon and Tuul river basins of the Khangai mountain region, encompassing 100,733 ha, and 7170 ha that is specially protected. The current study is more focused on methods for assessing climate change, pastureland change by herders and land degradation assessment.

impact of China's Priority Forest Programs on rural households’ income mobility

Journal Articles & Books
Décembre, 2013
Chine

Over the past two decades, China has undertaken unprecedented forest programs in an effort to restore damaged ecosystems and increasing farmers’ income. Using survey results of 2070 rural households in 15 counties of six provinces, we estimate the effects of China's Priority Forest Programs (PFPs) on rural households’ income mobility. The effects of the area enrolled in the PFPs on rural households are mixed.

Feedbacks underlie the resilience of salt marshes and rapid reversal of consumer‐driven die‐off

Journal Articles & Books
Décembre, 2013

Understanding ecosystem resilience to human impacts is critical for conservation and restoration. The large‐scale die‐off of New England salt marshes was triggered by overfishing and resulted from decades of runaway crab grazing. In 2009, however, cordgrass began to recover, decreasing die‐off ∼40% by 2010. We used surveys and experiments to test whether plant–substrate feedbacks underlie marsh resilience. Initially, grazer‐generated die‐off swept through the cordgrass, creating exposed, stressful peat banks that inhibited plant growth.

The choice of grass species to combat desertification in semi-arid Kenyan rangelands is greatly influenced by their forage value for livestock

Journal Articles & Books
Décembre, 2013
Kenya

Livestock production is the main source of livelihood in the arid and semi-arid lands in Africa. However, desertification characterized by vegetation degradation and soil erosion is a major threat to the sustainability of land-based production systems. Native rangeland forage species Cenchrus ciliaris L. (Buffel grass/African foxtail grass), Eragrostis superba Peyr. (Maasai love grass) and Enteropogon macrostachyus (Hochst. Ex A. Rich.) Monro ex Benth. (Bush rye grass) have been used to combat desertification.