This is a list of the longest-living organisms that includes oldest individual bioforms. This is usually defined as: ( 1 a) Having a longer life-span than any other known individual species (such as the Methuselah tree) OR. The Jurupa Oak colony is estimated to be at least 13,000 years old, with other estimates ranging from 5,000 to 30,000 years old. 2  A huge colony of the sea grass Posidonia oceanica in the Mediterranean Sea is estimated to be between 12,000 and 200,000 years old.
Greater abundances of solid particles in the water will decrease the depth of light penetration. Therefore, water near the seashore that is more turbid (cloudy) due to particles will show a decrease in light transmission, even in shallow water.
The purpose of this experiment is to determine the relationship between depth and pressure. Pressure and depth have a directly proportional relationship. This is due to the greater column of water that pushes down on an object submersed. Conversely, as objects are lifted, and the depth decreases, pressure is reduced. This relationship between pressure and depth may be looked at with respect to the relationship between pressure and volume, as the column of water has a specific volume and corresponding to depth.