The electroencephalogram (EEG) reflects brain electrical activity. A flat (isoelectric) EEG, which is usually recorded during very deep coma, is considered to be a turning point between a living brain and a deceased brain. Therefore the isoelectric EEG constitutes, together with evidence of irreversible structural brain damage, one of the criteria for the assessment of brain death.
Thus, the cloudier the water, the greater the turbidity. As algae, sediments, or solid wastes increase in the water, so does turbidity. Turbidity affects organisms that are directly dependent on light, like aquatic plants, because it limits their ability to carry out photosynthesis. This, in turn, affects other organisms that depend on these plants for food and oxygen. Scientists often consider turbidity of the water in connection with other factors to get a better understanding of its causes and consequences.
For all abiotic aspects of the environment, changing conditions require organisms to adapt or else suffer death. For example, a drought, flood, volcanic eruption, or earthquake drastically alters factors such as weather, water conditions, or even available elements and nutrients in the soil.iving organisms, such as tree leaves, can become a part of the abiotic environment once they die and have their nutrients absorbed back into the soil. Soil is part of an abiotic environment. A drought can alter the level of nutrients in soil.