a state of no oxygen that can exist in lakes, ponds and marine environments.
a process by which bacteria take in certain materials such as oxygen to sustain life
relating to the bottom of a lake or sea or organisms that live there
a location within a body of water that does not have enough disolved oxygen to sustain life
a process by which bacteria and other organisms breakdown dead organanic material
the process in which lakes, ponds, and marine environments receive runoff rich in life supporting nutrients like nitrogen phosphorus.
a state of low oxygen that can exist in lakes ponds, and marine environments
Various chemicles such as Nitrogen and Phospherus that are essential for the growth and reproduction of living things
tree floating photosythetic microscopic algae that inhabit ther ocean
any addition of matter or energy that decreases the quality of the environment for humans or other organisms.
when water in an ocean or lake is layered as a result of differences in temperature or salinity. This often prevents the water from mixing all the way to the bottom