1 / 12

Rising Sea Levels

Rising Sea Levels. Rising Sea Levels. Food Webs and Pyramids. What is a food web?. 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

len
Télécharger la présentation

Rising Sea Levels

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Rising Sea Levels

  2. Rising Sea Levels

  3. Food Webs and Pyramids

  4. What is a food web? • 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

  5. Parts of 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

  6. Energy Pyramids • 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

  7. Ten Percent Rule • 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

  8. Why only 10%? • 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

  9. Biomass Pyramids • 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

  10. Biomass Pyramids

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

  12. 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 • Hunting • Overfishing • Deforestation

More Related