1 / 41

Topic 6

Topic 6. Ecology. The environment is every living and nonliving thing that surrounds an organism. Ecosystem describes any portion of the environment. All the living things in an ecosystem are called biotic. Non living influences are called abiotic factors.

shasta
Download Presentation

Topic 6

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. Topic 6 Ecology

  2. The environment is every living and nonliving thing that surrounds an organism

  3. Ecosystem describes any portion of the environment

  4. All the living things in an ecosystem are called biotic

  5. Non living influences are called abiotic factors

  6. The specific environment in which organisms live is their habitat

  7. All the organisms of a species that live in the same area make up a population

  8. All the different populations are combined to form a community

  9. Collectively all of the Earth’s ecosystems make up the biosphere

  10. The fundamental concept of ecology is that all living organisms are interdependent, and they interact with one another and with the physical environment

  11. Competition is the struggle for resources among organisms

  12. Factors in the environment that limit the size of populations are known as limiting factors

  13. Predators kill and eat other organisms

  14. Prey are killed for food

  15. The number of organisms of any single species that an ecosystem can support is referred to as its carrying capacity

  16. DISCOVERY CHANNEL VIDEO CLICK ON PLANET EARTH

  17. The role that each species plays in the ecosystem is called its ecological niche

  18. In predator – prey relationships food chains show what eats what

  19. Photosynthetic organisms make their own food. They are known as autotrophs or producers

  20. Heterotrophs must acquire food by consuming other organisms. Heterotrophs are also called consumers

  21. Herbivores are heterotrophs that survive on plant tissues

  22. Carnivores are heterotrophs that eat other animals

  23. The wastes and dead bodies of all organisms are consumed by decomposers

  24. Scavengers are consumers that eat dead organisms they do not kill

  25. Parasites are organisms that attack other live organisms (called host organisms) but rarely kill them

  26. Food webs are diagrams that show more complex feeding relationships

  27. CLICK FOR VIDEO

  28. Almost all organisms use the solar energy (the sun) in food to power their life processes

  29. As energy is transferred, much of it is lost to the environment 1000 Calories 990 Calories lost to the environment 9Calories lost to the environment 10 Calories of plant matter available as food 1Calorie available as food

  30. An energy pyramid is a diagram that illustrates the transfer of energy through a food web or chain

  31. Carnivores Herbivores Producers

  32. Release of carbon dioxide Dead animals Release of oxygen (photosynthesis) Decomposition nutrients

  33. CLICK FOR VIDEO

  34. Biodiversity is a measurement of the degree to which species vary within an ecosystem

  35. Many species may be lost when natural disasters cause large scale destruction to habitats

  36. Species can also be lost when humans do not consider the environmental impact of their action

  37. Endangered species

  38. Biodiversity also represents one of the greatest resources known to humans. Medicinal herbs and plants are one example

  39. The series of changes by which one habitat changes into another is called ecological succession

  40. Climatic changes, natural disasters, and the activities of animals (including humans) can alter stable ecosystems

  41. View the process of ecological succession as it occurs in coastal lowlands by clicking on the image below

More Related