Human influence

R. M. Garrels, F. T. Mackenzie, and C. Hunt, Chemical Cycles and the Global Environment Assessing Human Influences, Kaufman, Inc., Los Altos, Calif, 1975 A. J. M. Schoot Uiterkamp, in P. M. Gresshoff, L. E. Roth, G. Stacey, and W. E. Newton, eds.. Nitrogen Eixation Achievements and Objectives, Chapman and Hall, London, 1990, p. 55. 

Sulfate concentration in streams and changes over time are discussed later in this article as one of the principal indices of human influences on stream water composition. Also, it will be shown that differences and similarities ia sulfate yields help in attaining a reasonable perspective on the importance of various hydrologic and geochemical characteristics of individual drainage systems. 

To this point, direct human impacts on the hydrosphere have remained restricted to the regional scale. Although they can still be important, particularly in terms of water supply, these direct manipulations of the hydrologic cycle are unlikely to affect the global water balance significantly. However, this is not to suggest that the global water cycle is immune to human influence its close ties to other physical and... 

Loft, S., Vistisen, K., Ewertz, M., Tjonneland, A., Overvad, K. and Poulsen, H.E. (1992). Oxidative DNA damage estimated by 8-hydroxydeoxyguanosine excretion in humans influence of smoking, gender and body mass index. Carcinogenesis 13, 2441-2447. 

Effect of human influence on the carbon stock in forests... 

The obtained results allow us to advance with the basic assumption the north sector, subject to anthropogenic influence, it showed a carbon stock 23% lower than the south sector, which had less accessibility and a better state of conservation (Table 4). These differences were statistically significant (H = 11.20, p < 0.001) only for the AGB stratum, but not for the other strata studied nor for the total carbon stock. Under similar conditions of climate, soil, geomorphology, altitude, and latitude, the human influence could explain these differences, as the AGB stratum is the easiest to appropriate by humans [10,17,19, 21]. The AGB make the largest contribution in both sectors to the carbon stock (53, 55%), followed by SOC (28-31%) and finally BGB (8-10%) depending on the sector analyzed (Figure 3). 

The Fifth Assessment Report from the Intergovernmental Panel on Climate Change states that human influence on the climate system is clear [1], The C02 concentration in the atmosphere is continuously growing. The latest value is 402.52 ppm (January 2016, Mauna Loa Observatory), which is 2 pmm higher than the value registered in January 2015 [1],... 

The Physical Framework and Historic Human Influences in the Ebro River... 

Human Influences at the River Ebro Watershed 6.1 Historic Human Settlements... 

Acidosis induced by salt feeding to humans influenced urinary calcium loss as effectively as feeding whole foods. Martin and Jones (25), for example, fed adult subjects a diet supplemented with ammonium chloride which resulted in marked hypercalciuria and an acidified urine. In a follow-up trial, feeding alkali as sodium bicarbonate, they also demonstrated that human hypercalciuria could be prevented by adding an alkaline supplement to the diet. 

The volume of solution in the subsurface, under partially saturated conditions, varies with the physical properties of the medium. In the soil layer, the composition of the aqueous solution fluctuates as a result of evapotranspiration or addition by rain or irrigation water to the system. Changes in the solution concentration and composition, as well as the rate of change, are controlled by the buffer properties of the sohd phase. Because of the diversity in the physicochemical properties of the sohd phase, as well as changes in the amount of water in the subsurface as result of natural and human influences, it is difficult to make generalizations concerning the chemical composition of the subsurface aqueous solution. 

Cultural Eutrophication accelerated aging of water body due to human influence and water pollution... 

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