Download
latitudinal species diversity gradients n.
Skip this Video
Loading SlideShow in 5 Seconds..
Latitudinal Species diversity gradients PowerPoint Presentation
Download Presentation
Latitudinal Species diversity gradients

Latitudinal Species diversity gradients

276 Vues Download Presentation
Télécharger la présentation

Latitudinal Species diversity gradients

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Latitudinal Species diversity gradients Miller 8-1

  2. Latitude • Distance North or south of the equator. • What changes as you move away from the equator?

  3. More sunlight at equator. • Warmer • More seasonality as you move away from the equator.

  4. Species diversity • Diversity refers to the number of different species in an area. • An area with lots of different kinds of species is said to have a high species diversity

  5. Amphibian Species Diversity

  6. Where is most of our species diversity located? • Tropical forests • Coral reefs • Deep sea • Tropical lakes

  7. Terrestrial species diversity

  8. Latitudinal species diversity gradient • For most groups of plants and animals, species diversity decreases with distance from the equator. • Highest in tropics and lowest in polar tundra

  9. What are some reasons for this pattern? • Resource availability is higher and more reliable in the tropics • Evolution is faster in the tropics – less disturbance • More diseases and parasites – keep any one species from dominating