The oil spill is often caused by the waterways vehicular transport which spill out large amount oil on the surface of water. As a result of this activity the oil remains on the surface of water and oxygen gas from the atmosphere does not diffuse inside the water body. This leads to the depletion of oxygen inside the water body. As a result of this the aquatic organisms die in large numbers this leads to the reduction in biodiversity of an aquatic biome.
