The Edwards Aquifer in south-central Texas, U.S.A. is recognized worldwide for its aquatic species of flora and fauna, many of which are endangered or threatened, and also is the sole water source supporting the industrial, agricultural, municipal, and recreational needs of nearly 2 million people. Because it is generally the first species affected by low spring flows, the endangered fountain d...

There are approximately 470,000 km(2) of karst aquifers that feed many large springs in North China. Turbulent flow often exists in these karst aquifers, which means that the classical ground water model based on Darcy's law cannot be applied here. Ground water data are rare for these aquifers. As a consequence, it is difficult to quantitatively investigate ground water flow in these karst syst...

abstract background: and soils with which it comes in contact. there is dual exposure from radon in water i.e. due toinhalation of the radon released from the water into the ambient air and through ingestion whenwater is used for drinking. as radon contaminated water adversely affects the health, it istherefore fundamental from health and hygiene point of view to measure radium concentrationand...

Cryptosporidum can be transmitted via water that is contaminated with human or animal faeces. There have been a number of documented outbreaks of cryptosporidiosis attributed to potable water, well water, spring water and surface water. Several outbreaks have also been associated with contaminated recreational water in swimming pools. Cryptosporidium are a particular risk in swimming pools beca...

AIMS Molecular procedures were used to identify Thiothrix spp. in biofilms from sulphide-rich waters in two distinct ecosystems. METHODS AND RESULTS Biofilm samples were obtained from two groundwater-fed systems in central and northern Florida, including an artesian spring and municipal water tank. The 16S rDNA in each sample was directly amplified by polymerase chain reaction. CONCLUSIONS ...

Spring mineral water might have the properties favourable to health, which should be assessed by clinical and pharmacological analyses. Efforts have recently been made to approach the study of the validity of spring mineral water curative therapies by advanced biochemical research on both animal models and humans. Owing to the paramount interest and the growing recent use of drinking mineral wa...

Living stromatolites growing in a hot spring in Yellowstone National Park are composed of silica-encrusted cyanobacterial mats. Two cyanobacterial mat types grow on the stromatolite surfaces and are preserved as two distinct lithofacies. One mat is present when the stromatolites are submerged or at the water-atmosphere interface and the other when stromatolites protrude from the hot spring. The...

[1] Particulate organic carbon (POC) export fluxes were estimated in the shelf-slope region of the Chukchi Sea using measurements of Th U disequilibria and the POC/Th ratio in large (>53-mm) particles. These export fluxes were used in conjunction with rates of primary productivity and benthic carbon respiration to construct a POC budget for this shelf-slope region. Samples were collected along ...