Water presents one of the earth resources as a component environmental change, demanding research water use. A nusmber authors analyzed use from different perspectives, in regions, not including efficiency index and productivity whole EU. The presented contribution is orientated to evaluation through development indexes EU member states. made by single analysis time development, followed countr...

using productivity index for investigating a firms’ performance makes it possible to evaluate efficiency of the production system and cost at the same time. in this study the total factor productivity (tfp) of several sugar cane varieties in imam khomeini cultivation and processing center in khuzestan province is compared. two hundred and forty eight farms are categorized on the basis of variet...

We used the burrowing crayfish Procambarus alleni as a model organism to compare spatial and temporal patterns of density, standing crop biomass, and sizestructured productivity in the seasonal wetlands of the Florida Everglades where environmental stress has been exacerbated by hydropattern disturbance. Crayfish density was not linked to fluctuations in water temperature or dissolved oxygen an...

The impact of climate variability on the water cycle in desert ecosystems is controlled by biospheric feedback at interannual to millennial timescales. This paper describes a unique field dataset from weighing lysimeters beneath nonvegetated and vegetated systems that unequivocally demonstrates the role of vegetation dynamics in controlling water cycle response to interannual climate variabilit...

Ocean acidification is a major threat for marine life but seagrasses are expected to benefit from high CO2. In situ (long-term) and transplanted (short-term) plant incubations of the seagrass Cymodocea nodosa were performed near and away the influence of volcanic CO2 vents at Vulcano Island to test the hypothesis of beneficial effects of CO2 on plant productivity. We relate, for the first time,...