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Population and ecosystem (Relationships (Predation (Predators eat prey,…

- - - - Fresh water
      - Salt water
        
        Coast - sunlight
        
        Open sea - sunlight
        
        Deep sea - no sunlight
  - - - Depend on
        
        Precipitations
        
        Temperature
      - Plants need
        
        Warm temperature
        
        Regular precipitations
- - - - Air
      - Soil
      - Water
- - - - Herbivores
      - Omnivores
      - Carnivores
      - Decomposers
        
        Bacteria and fungi
        
        Break down dead living things into nutrients
- - - - Food
      - Shelter
      - Water
- - - - Limiting factor
        
        Determining health of the plant
        
        Applies to plants interactions with its habitat
    - - Random distribution
        
        No predictive value
        
        No identifiable pattern
      - Clumped distribution
        
        Spacing between plants either small or large
        
        Rarely average
      - Uniform distribution
        
        Occurs in orchards and tree plantations
        
        All evenly spaced
      - Zone
        
        Prevents germination or growth of others
        
        Can be established by release of chemicals
        
        Allelochemicals
  - - - It’s demography
      - Proportions of young,middle-aged,and old individuals
    - - Generation time
        
        Length of time from birth of one individual
        
        Until the birth of its first offspring
        
        Affects rapidity of population growth
      - Intrinsic rate of natural increase
        
        That living long enough to reproduce under ideal conditions
        
        Or biotic potential
        
        Number of offspring produced by an individual
    - - r-selection
        
        Annuals or small shrubby perennials
        
        A disturbance produces or conditions
        
        Resources are then plentiful for the few plants that remain
      - k-selection
        
        Conditions in a crowded habitat
        
        Douglas first and bristle-cone pines
        
        Face intense competition from other plant species