Resources and niche concepts

• Resource

  All of the biotic and abiotic factors that an organism needs to survive and be successful
• Resources are always scarce, causing competition and stress for all organisms when they cannot get enough of what they need
• Niche


  all the resources that an organism has to be successful in it's environment
• Fundamental niche

  all of the resources that are needed and wanted
• Realised niche


  resources that are actually available
• Distribution


  Resources are clumped together, and you have to go look for them
• Availability


  Resources are not constant, but only available at certain times of the year or once every few years
• Limited supply


  only a certain number of something is produced in a year
• Scarcity

  limited amount of resources
• Physiological stress


  internal stress. Absence of specific chemicals causes biochemical reactions to slow down
• Physical stress

  Injury, Muscle damage, disease
• Behavioural stress


  Intraspecific and interspecific cooperation and competition