Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Fairy circles of Namibia

  1. Nov 7, 2006 #1


    User Avatar
    Gold Member

  2. jcsd
  3. Nov 7, 2006 #2


    User Avatar
    Gold Member


    One of the most famous cases of purported allelopathy is in desert shrubs. Salvia leucophylla was one of the most widely known early examples because it was on the cover of the journal Science in 1964[2] Bare zones around the shrubs were hypothesized to be caused by volatile terpenes emitted by the shrubs. However, like many allelopathy studies, it was based on artificial lab experiments and unwarranted extrapolations to natural ecosystems. In 1970, Science published a study where caging the shrubs to exclude rodents and birds allowed grass to grow in the bare zones.[3] A detailed history of this interesting story can be found in Halsey 2004.[4]
  4. Nov 7, 2006 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Diffuse knapweed is absolute death on grasses --- just try letting it go for a while in a lawn.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Fairy circles of Namibia
  1. The circle in music (Replies: 9)

  2. The crop circle (Replies: 34)