Role of the disturbance in shaping bio geography
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Role of the disturbance in shaping bio geography

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It will help to students who study bio geography and relevant subjects , this is a project what we have done in our university and now i m publishing this for your references. in this presentation we ...

It will help to students who study bio geography and relevant subjects , this is a project what we have done in our university and now i m publishing this for your references. in this presentation we describe of disturbance types and how it was worked , unfortunately we are not able to upload the containing video to this presentation if you need it just you will able to get it from you tube by searching plate tectonics mechanism , study well and best of luck !!!!!!!

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Role of the disturbance in shaping bio geography Presentation Transcript

  • 1. The Role Of Disturbance In Shaping The Biogeography
  • 2. Introduction What is shaping biogeography ?  Shaping the biogeography is adjustment and distribution of species and ecosystems in geographic space and through geological time What are the disturbances ?  Any relatively discrete event in time that disrupts or catastrophic events
  • 3. Types of disturbance Natural Anthropogenic Autogenic Mainly these disturbances effect on Species diversity Land mass Habitats Regional and global climates
  • 4. Disturbances  Plate tectonics  Perturbations  Other natural disturbances
  • 5. What is the plate tectonics  A theory that states that the earth’s crust is made up of a number of plates which move over a liquid crust that get created and destroyed over time.  According to the plate tectonics theory, the uppermost mantle, along with the overlying crust, behaves as a strong, rigid layer. This layer is known as the lithosphere.
  • 6.  A plate is one of numerous rigid sections of the lithosphere that move as a unit over the material of the asthenosphere. A Side View Of Structure Of Earth
  • 7. Tectonics History
  • 8. Tectonic Plates of The Earth There are 16 tectonics plates and 7 tectonics plates are consider as main tectonics plates Main tectonics plates • African Plate • Antarctic Plate • Australian Plate Continental Plates • North American Plate • South American Plate • Eurasian Plate • Pacific Plate - Oceanic Plate
  • 9. Plate Tectonics Mechanism by video
  • 10. Effect of Plate Tectonics  Effect on the area of landmasses and marine basins – Plate tectonics helps to create continents , Ocean and Islands
  • 11. Effect on isolation and opportunities for Biotic exchange • As Pangea began to separate into separate continents before130 Million years , creating physical barriers such as seas, restricting migration to within the continents
  • 12. • Gene pools of species are separated and as they are exposed to different physical and biotic conditions, each portion of the species adapts differently and eventually forms new species on the separated continents Example – Australian continent is the most rich of speciation due to isolation
  • 13.  Effect on regional and global Climates • Due to Continents separate and latitudinal shifting it cause to different climates on different continents • Due to continents drifted over or near the pole it cause to cold climate at there Example – Arctic & Antarctic
  • 14. Different climates on The Earth
  • 15. Other natural disturbances Geographical Factors – Mountains , Rivers , Oceans These geographical factors help for separating a species to two or more groups and to Isolation of each groups
  • 16. Perturbations Perturbations such as floods , volcanoes & wildfires are cause to remove or termination of species from a certain places and it cause to find new shelters and spreading to new places