Examlex
With Oracle Database,using a sequence does not guarantee valid surrogate key values.
Epilimnion
The upper layer of water in a stratified lake, characterized by warmer temperatures and high oxygen levels compared to deeper layers.
Hypolimnion
The colder, denser, bottom layer of water in a stratified lake, lying below the thermocline and not mixing with the warmer, upper layers.
Eutrophic Lake
A body of water characterized by high levels of nutrients leading to an abundance of plant life and depletion of oxygen, which can be detrimental to other organisms.
Oligotrophic Lake
A lake characterized by low nutrient concentrations, which typically supports little aquatic plant life.
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