The Grain to Green Program (GTGP) and eco-environmental emigration have been employed to alleviate poverty and control rocky desertification in the Southwest China Karst region. Carbon sequestration and oxygen production (CSOP) is used to indicate major ecological changes, because they involve complex processes of material circulation and energy flow. Using remote sensing images and weather rec...

ABSTRACT The French Mediterranean coastal aquifers are essentially alluvial, deep sedimentary and karst. Whereas the alluvial aquifers are particularly sensitive to salt-water intru sion, contamination of the deep aquifers is generally due to vertical hydraulic connec tion with the shallow aquifers. As for the karst systems, which are quite well developed f rom Languedoc-Roussillon to Provence-...

It has previously been shown that lack of magnesium, potassium or manganese depresses allocation of new mass to roots in trees, and that these elements often occur in low amounts in declining forest stands. A model for tree growth and nutrient uptake was used to examine the effect of allocation pattern of new plant mass on growth and development in soils with low nutrient concentrations. Growth...

Remotely sensed data has become an important source for geoscientists to understand the earth. With the rapidly growing availability of remotely sensed data and field surveys, there is an urgent demand to interpret and analyze these data. Remote sensing is a promising technology to support geohydrological studies, mainly because of the potential to observe areas and entire river basins rather t...

Troglobites, or species restricted to caves, commonly have small ranges and high levels of endemism, making them extremely sensitive to relatively small-scale habitat alteration that results from urbanization. Protection of federally listed endangered troglobites in central Texas focuses on caves that are occupied by the species. The determination of occupancy is based on presence/absence surve...

Largely dependent on gold mines for their economic survival, many mining towns in the Far West Rand fear the effects of the inevitable impact of mine closure, not only on the economy but also on social stability. Large-scale environmental degradation in the form of sinkholes and widespread radioactive pollution exacerbate such fears. Based on an analysis of mining impacts and potential threats ...

Part I issued November 1974 PAGE Yeast Mutant Requiring an Organic Solvent for Growth. By F. KARST and F. Nitrite and Ammonia Assimilation by Anaerobic Continuous Cultures of Eschericlzia coli. By J. A. COLE, K. J. COLEMAN, B. E. COMPTON, B. M. KAVANAGH and C. W. The Utilization of' Nitrogen Sources by Aspergillus clavatus. By J. H. ROBINSON, C. Regulation of Aromatic Metabolism in Fungi: Selec...

Abstract Within the UNESCO Škocjan Caves, detailed geological structural mapping of cave passages and surface above revealed interesting structural-lithological characteristics two major collapse dolines, Velika Dolina Mala Dolina. As a result karst processes effects formation older—stratigraphically lower—carbonates Sežana Formation (K 2 2−4 ) crop out at surface, underlying rocks younger Lipi...