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.
Biotic factors, as well as abiotic factors, have more to do with how those parts of an ecosystem affect one another than the specific living or non-living thing itself. Biotic factors in an ecosystem are the living things that affect other living things in that ecosystem. Competition, consumption, predation, parasitism, disease, even symbiosis are all ways a biotic factor could have an effect on the other creatures they encounter.