1 / 14

ECOLOGICAL SUCCESSION

ECOLOGICAL SUCCESSION. Ecosystems tend to change with time until a stable system is formed. The stable system that will form depends on climatic limitations. Ecological Succession.

neka
Télécharger la présentation

ECOLOGICAL SUCCESSION

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. ECOLOGICAL SUCCESSION • Ecosystems tend to change with time until a stable system is formed. • The stable system that will form depends on climatic limitations.

  2. Ecological Succession • The replacement of one community by another until a stable stage is reached is called ecological succession.

  3. Climax Community • The final stage of succession is called the climax community. • The climax community in New York State is an oak-hickory forest or a maple-beech forest.

  4. Primary Succession • Primary succession occurs where there was no previous community, such as on bare rock or sand. • Primary succession begins with pioneer organisms.

  5. Pioneer Organisms • Pioneer organisms can tolerate extremeconditions: hot and cold; dry and wet. • Moss, dune grass, and lichens are pioneer organisms.

  6. Lichens • Lichens are algae and fungus growing together in a mutualistic relationship. Algae make the food; fungus anchor and capture water.

  7. Pioneer organisms • Soil is produced over hundreds of years by pioneer organisms. • These organisms break apart rock, add humus as they die and decompose, and hold water • This allows other organisms to grow there.

  8. Each community changes the conditions so that they are more favorable to other organisms that replace them. For example, some types of trees need a lotof sun and their saplings cannot grow under the shade of their own species. They will be replaced by the types of trees whose saplings can grow in shade of other trees. Succession occurs BECAUSE

  9. Secondary Succession • When a community is disrupted and succession occurs again, it is called secondary succession. • Disruption may be from fire, farming, wind, foresting

  10. Secondary Succession • The community begins again where the former community was disrupted. • Soil is already present.

  11. A community is still undergoing succession • As long as the species keep changing: • Here, the plants growing under the pine trees are NOT small pine trees, so the species will be changing as the old pine trees fall.

  12. Climax Community • The same climax community will develop unless the abiotic conditions have changed.

  13. We can tell it’s a climax community- • A climax community replaces itself with more of itself: • Under sugar maple trees, we will see sugar maple saplings-that shows that it is a climax community

  14. Climax Community • The climax community will be part of the BIOME of that area. • Our climax community- oak/hickory forest-is part of the temperate deciduous forest biome

More Related