1 / 10

Ecology

Ecology . The study of the interactions between organisms and their environment. 2 types of environments. Biotic – organisms Abiotic – physical factors such as temperature, precipitation, and soil. Organization of the environment. Organism – single Population- many of the same kind

alika-tillman
Download Presentation

Ecology

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. Ecology The study of the interactions between organisms and their environment

  2. 2 types of environments • Biotic – organisms • Abiotic – physical factors such as temperature, precipitation, and soil

  3. Organization of the environment • Organism – single • Population- many of the same kind • Community – different kinds living together • Ecosystem – different kinds living together (community) with abiotic factors • Biosphere – all ecosystems together

  4. All life Requires Energy • Law of conservation of energy – energy is not created or destroyed • Where do we get our energy?

  5. Energy Pathway • Producers – use sunlight to make food • Consumers – eat producers - herbivores = eat plants - carnivores = eat animals - omnivores = eat both - scavengers = eat dead animals • Decomposers - break down the remains of dead organisms (decomposition reactions!) • See page 11 in your text book

  6. The Math of the Energy Pathway! • There are 12,000 units of the sun’s energy available to grass at the base of an energy pyramid. Grass stores 10% of the available energy, so that energy becomes available to the next consumer, a rabbit. The rabbit a consumer of grass stores 10 % of the energy that was stored in the grass. A coyote, a consumer of rabbits, stores 10% of the energy that was stored in the rabbit. Calculate the units of food energy stored in the grass, the rabbit, and the coyote.

  7. The Answers! • The grass stores 10% of the suns energy 0.1 x 12,000 = 1,200 units of energy • The rabbit stores 10% of the grass’ stored energy 0.1 x 1,200 = 120 units of energy • The coyote stores 10% of the rabbits stored energy 0.1 x 120 = 12 units of energy

  8. We manage this energy by: • Food Chain – how energy in food molecules flows from one organism to the next - notice that energy from the sun is lost at each level of the food chain • Food web – all the different pathways energy from food travels • Which is the most complicated?

  9. Food chains and webs Food Chain Food Web

  10. Food web exercise! • Use your computer and graphics to construct a food web

More Related