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Chapter 25 (The structure of populations (Local geographic distribution…

- - - - Biotic is factors are critical #
  - - - Intuition is called allelopathy
  - - - Generation time - length of time between birth of one individual and then its offspring
        
        And the intrinsic rate of natural increases or biotic potential
        
        Biotic potential is measured by ideal conditions
  - - - Typically annuals our small shrubby perennials
    - - Face intense competition
      - Long lived conifers such as redwoods
- - - - Plants change dramatically with time
  - - - Photosynthesis is the most common
        
        Autotrophs - plants that make their own food - are primary producers
        
        Herbivores are primary consumers
        
        Those who prey on herbivores are secondary consumers
        
        Fungi and some other animals are decomposers
- - - - Climate
        
        Climate is important because some species are restricted to certain regions primarily because they cannot love climatic conditions out side those regions
        
        Tolerance range is the between of the high and low extremes
      - Soil factors
        
        Soil is formed by break down of rock
        
        The first plants that include a soil are called pioneers
        
        The A Horizon is the uppermost and is sometimes called the zone of leaching
        
        The B Horizon is the next layer also known as zone of deposition
        
        The C horizon is below that and is comprised mostly of rock
    - - The plant itself
      - Other plant species #
        
        Mutualism and competition
        
        The role of competition has been debated. One theory is that the result of competition is competitive exclusion
        
        Niche is that each species evolved to a specific set of conditions