What does A/A/O mean in ACADEMIC & SCIENCE

The abbreviations A/A/O represent the three distinct conditions that can be found in an aquatic environment - anaerobic, anoxic and oxic. These terms describe different levels of oxygen availability for aquatic organisms, ranging from little to no oxygen to high concentrations of the element. Understanding each of these three parameters is important for both ecological and commercial purposes.


A/A/O meaning in Academic & Science in Academic & Science

A/A/O mostly used in an acronym Academic & Science in Category Academic & Science that means anaerobic/anoxic/oxic

Shorthand: A/A/O,
Full Form: anaerobic/anoxic/oxic

For more information of "anaerobic/anoxic/oxic", see the section below.

» Academic & Science » Academic & Science


Anaerobic refers to a condition in which there is very little or no dissolved oxygen present. Many organisms are capable of surviving in such low oxygen environments by utilizing alternative metabolic pathways which don't require oxygen. As a result, anaerobic conditions typically contain a reduced diversity of species compared to other habitats.


Anoxic describes an environment where oxygen is not present, but is also one step removed from being completely depleted like in anaerobic environments. In this case, some dissolved oxygen remains but is so low that it cannot support most life forms. Microbial activity often continues at low levels under these conditions, since some bacteria and archaea have the ability to respire without using molecular oxygen as fuel.


Oxic environments contain abundant dissolved oxygen supplies available for use by living organisms. These habitats are typically characterized by higher biodiversity and energy productivity than those with lower concentrations of the gas due to the increased metabolic capabilities provided by O2 availability. Photosynthesis is also possible in oxic systems, further contributing to their productive and diverse nature.

Essential Questions and Answers on anaerobic/anoxic/oxic in "SCIENCE»SCIENCE"

What is the difference between anaerobic and anoxic?

Anaerobic environments are those which lack oxygen. Anoxic environments still contain oxygen, but at a very low concentration. As such, organisms in anaerobic environments cannot use oxygen to respire, while organisms in anoxic environments can respire with oxygen albeit they must do so at a much slower rate as compared to organisms residing in more oxic environment

Final Words:
In summary, A/A/O stands for anaerobic, anoxic and oxic; three distinct environmental conditions based on their relative levels of dissolved oxygen concentration which determine their suitability for certain types of aquatic life forms. Understanding each type is essential when considering the ecology or management of any given waterway system or body of water.


Use the citation below to add this abbreviation to your bibliography:

Style: MLA Chicago APA

  • "A/A/O" www.onlineabbreviations.com. 04 Mar, 2024. <https://www.onlineabbreviations.com/abbreviation/308>.
  • www.onlineabbreviations.com. "A/A/O" Accessed 04 Mar, 2024. https://www.onlineabbreviations.com/abbreviation/308.
  • "A/A/O" (n.d.). www.onlineabbreviations.com. Retrieved 04 Mar, 2024, from https://www.onlineabbreviations.com/abbreviation/308.
  • New

    Latest abbreviations

    Respect for Others Advisory Committee
    Bangkok International Banking Facilities
    Consortium Financier de Production de Films
    Connective Tissue Disease Cascade
    Soft Light Energy Release