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Displaying 561 - 565 of 1605

Fifty years of herpetological research in the Namib Desert and Namibia with an updated and annotated species checklist

Journal Articles & Books
Décembre, 2013
Namibie

Namibia is mostly an arid and semi-arid country with a high number of reptile and fewer amphibian species. We review the herpetological literature dealing with Namibian species over the past fifty years, and provide up-to-date amphibian and reptile accounts using a widely accepted taxonomy and nomenclature. We critically discuss species accounts, draw attention to the historical development of species inventories for the country, and indicate species endemism for Namibia and the Namib Desert.

Remote sensing based ecosystem state assessment in the Sandveld Region, South Africa

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe

We present a remote sensing based approach for assessing ecosystem state or intactness to inform land use management and conservation planning. Using segmented multispectral medium resolution satellite imagery, parameters related to the image objects’ spectral brightness and heterogeneity, and compactness are used to derive a scoring system of 0 to 10 for the ecosystem intactness, with 0 being completely degraded and 10 being pristine.

integration of crop rotation and tillage practices in the assessment of ecosystem services provision at the regional scale

Journal Articles & Books
Décembre, 2013
Allemagne

The provision of ecosystem services at the landscape level can be significantly influenced by land management practices. Within an agriculturally dominated case study area in Saxony, Germany, a more detailed land use classification, which includes differentiated information on agricultural management practices, was utilized within the raster-based planning support tool GISCAME. “Management” refers to typical, regional crop rotations and soil tillage practices.

impact of mediterranean land degradation on agricultural income: A short-term scenario

Journal Articles & Books
Décembre, 2013
Italie

The present study estimates the potential costs of land degradation (LD) in agriculture at the national scale in Italy during 2000–2006 and provides a medium-term scenario for 2015 based on changes in climate conditions and human pressure. According to the user cost approach, a depletion factor (S) to agricultural income has been derived from the observed changes in a composite index of land sensitivity to degradation. Based on S figures, the investigated area has been classified into five risk categories from ‘negligible’ to ‘high’.

Maintaining the contract responsibility system of forest land distribution in China: Evidence from a novel financial compensation scheme in Daxi Village of Anji County, Zhejiang

Journal Articles & Books
Décembre, 2013
Chine

Guaranteeing households’ equal access to land has long been advocated as paramount to implement development policies in Rural China. Given the chronic land scarcity in densely populated regions of China, finding a compromise between private and collective land rights has been important to protect livelihood safety nets and to address poverty issues in rural areas, especially in the initial stages of reform.