• processes
  • It is based on the application of appropriate scientific methodologies focused on levels of biological organization which encompass the essential processes, functions and interactions among organisms and their environment. (cbd.int)
  • problems
  • On the other hand, when sea-living organisms are kept or investigated for a long period of time in a closed environment such as a water tank, there may occur problems, e.g. changes in the pH of the sea-water and development of diseases. (google.com)