Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Primary or secondary succession in a desert?

No description

Brett lang

on 28 April 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Primary or secondary succession in a desert?

Primary and secondary succession in a desert

Primary succession
In deserts, primary succession could occur on a sand dune or a fresh lava flow. Bacteria or seeds of colonizing species find a foothold where a microclimate offers a pocket of increased moisture and protection. These original colonizers form biofilms and put down roots that stabilize the upper layer of soil and break down rocks. The improved soil can hold more moisture and support other plants, which crowd out the original colonizers. Eventually the ecosystem may be able to support grasses and finally woody shrubs, if there is enough water.
Desert ecosystems can be disturbed by fire, flash flood scouring or land clearing. After disturbance, succession is set back, but the soil has already been developed. Secondary succession in deserts is relatively quick compared to primary succession, but it takes much longer to establish a desert community than it does in less arid regions. For example, in the southwestern deserts of North America, it can take 76 years to establish perennial plant cover and 215 years for full ecosystem recovery. If the disturbance is great enough, secondary succession may produce an entirely different climax ecosystem.
Secondary succession
Full transcript