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Interactions Among Living Things Ch. 1.3

Environmental Science. Interactions Among Living Things Ch. 1.3. 1) Adapting to Environments. A ) Natural Selection Population has individuals Individuals have characteristics for survival and reproduction Offspring do the same. 1) Adapting to Environments. B) Adaptations

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Interactions Among Living Things Ch. 1.3

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  1. Environmental Science Interactions Among Living ThingsCh. 1.3

  2. 1) Adapting to Environments A) Natural Selection • Population has individuals • Individuals have characteristics for survival and reproduction • Offspring do the same

  3. 1) Adapting to Environments B) Adaptations • Behaviors/characteristics to allow to survive C) Niche- how an organism makes its living • Where it feeds, sleeps, survives • makes its home

  4. 2) 3 Major Types of Interactions A. Competitions • The struggle between organisms to survive in a habitat with limited resources

  5. 2) 3 Major Types of Interactions • B. Predation • One organism kills and eats another • Predator - does the killing • Prey - organism killed • When death rate exceeds birth rate-population decreases

  6. 2) 3 Major Types of Interactions C. Symbiosis • Close relationship between 2 species • benefiting one species • 3 types of relationships • 1. Mutualism • 2. Commensalism • 3. Parasitism Tortoise and Bird (click video-sound to view)

  7. 1. Mutualism- • Both species benefit • Ex: sea anemone & clownfish • Clownfish feeds on sm. invertebrae to protect sea anemone • Sea anemone feeds on clownfish waste

  8. 2. Commensalism- • One species benefits, other species is not helped or harmed • Ex: fish protecting fish

  9. 3. Parasitism- • An organism living in or on another organism • Parasite benefits • Ex: leeches, ticks, fleas • Host provides living space and is harmed

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