 Rising Sea Levels

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  Several food chains connected together  Shows many different paths of how plants and animals are connected  Each level of animal represents a different trophic level  Which is an organisms position on the food web What is a food web?

  Primary Producer: produces own food by photosynthesis  Usually green plants  Primary Consumer: animals that consume only plant matter  Aka herbivores-rabbits and cows  Secondary Consumer: animals that eat primary consumers (herbivores)  Aka carnivore- owls and foxes  Tertiary Consumer: animals that eat secondary consumers  Carnivores that eat other carnivores Parts of a food web

  Model of energy flowing in a community  They are measured from the bottom trophic level to the top  Primary Producers  Primary Consumers  Secondary Consumers  Tertiary Consumers Energy Pyramids

  An average of only 10% of the energy in one trophic level is passed to the next trophic level  90% is used by previous trophic level Ten Percent Rule

  Energy is used up for daily life activities  Not all organisms that die are eaten by animals on the next trophic level  Not all parts of organisms are eaten and digested for energy Why only 10%?

  Amount of energy available in the form of organic matter of organisms  There is a gradual decrease in biomass from producers to higher trophic levels  2 common types  Terrestrial  Aquatic Biomass Pyramids

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  Why is it inverted (upside down)?  Smaller weight of producers are supporting consumers of a large weight Aquatic Pyramid

  Hunting  Overfishing  Deforestation Human Impact Destroys the environment in which the organisms eat or make their food Removes food source for other organism Could lead to extinction of species