Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

Relative Effects of Herbivory by Sheep, Rabbits, Goats and Kangaroos on Recruitment and Regeneration of Shrubs and Trees in Eastern South Australia

F. Tiver and M. H. Andrew
Journal of Applied Ecology
Vol. 34, No. 4 (Aug., 1997), pp. 903-914
DOI: 10.2307/2405281
Stable URL: http://www.jstor.org/stable/2405281
Page Count: 12

You can always find the topics here!

Topics: Herbivores, Sheep, Rabbits, Species, Plants, Grazing, Vegetation, Goats, Applied ecology, Shrubs
Were these topics helpful?
See somethings inaccurate? Let us know!

Select the topics that are inaccurate.

Cancel
  • Read Online (Free)
  • Download ($18.00)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Relative Effects of Herbivory by Sheep, Rabbits, Goats and Kangaroos on Recruitment and Regeneration of Shrubs and Trees in Eastern South Australia
Preview not available

Abstract

1. Short-term recruitment and long-term regeneration of 18 species of shrubs and trees in over 600 populations in eastern South Australia were determined by surveying membership in life history classes.2. Sites were stratified using current herbivory levels by sheep, rabbits, goats and kangaroos, past herbivory by sheep, and edaphic (soil) variables. 3. Ten species showed significant negative effects of present or past herbivory, either on recruitment, regeneration or both. Sheep grazing was the most important variable and the other herbivores frequently did not have independent effects on regeneration. 4. There was a poor relationship within a plant species between suppression of recruitment and suppression of regeneration by herbivores. The negative effects of herbivory on recruited juveniles must exceed natural thinning before overall regeneration is affected. 5. Some species showed major disruption of regeneration at sites with a history of heavy grazing during the 19th century regardless of their present responses to grazing. This evidence supports non-equilibrium models of vegetation dynamics and indicates the importance of taking historical and other non-equilibrium effects into account when designing studies of plant populations. 6. If many plant species are to avoid local extinction, it will not be sufficient to rely on controlling goats and rabbits as a conservation measure while ignoring the overriding effects of sheep grazing. The pattern of grazing use of the area will have to be modified to secure long-term conservation. A regional network of small and large reserves is suggested.

Page Thumbnails

  • Thumbnail: Page 
903
    903
  • Thumbnail: Page 
904
    904
  • Thumbnail: Page 
905
    905
  • Thumbnail: Page 
906
    906
  • Thumbnail: Page 
907
    907
  • Thumbnail: Page 
908
    908
  • Thumbnail: Page 
[909]
    [909]
  • Thumbnail: Page 
910
    910
  • Thumbnail: Page 
911
    911
  • Thumbnail: Page 
912
    912
  • Thumbnail: Page 
913
    913
  • Thumbnail: Page 
914
    914
Part of Sustainability