Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Phenological Events and Their Environmental Triggers in Mojave Desert Ecosystems

Janice C. Beatley
Ecology
Vol. 55, No. 4 (Jul., 1974), pp. 856-863
Published by: Wiley
DOI: 10.2307/1934421
Stable URL: http://www.jstor.org/stable/1934421
Page Count: 8
  • Download ($42.00)
  • Subscribe ($19.50)
  • Cite this Item
Phenological Events and Their Environmental Triggers in Mojave Desert Ecosystems
Preview not available

Abstract

Phenological events in Mojave desert systems are triggered by heavy rains (>25 mm [1 in]). The most predictable and consequential of these is a regional rain between late September and early December. This rainfall event is usually the precursor of successful vegetative and reproductive growth of shrubs the next spring, and is usually necessary for all growth phenomena of herbaceous perennials and winter annuals during the following winter and spring. For most plant components in most years, the growing season is synchronized within the autumn-winter-spring period, and the relative biological success each spring is dependent upon the occurrence or failure of occurrence of events of the preceding autumn. Under certain conditions rainfall during other seasons may trigger growth and reproduction of the primary producers and permit at least moderate or local successes every season. The relationships are stated in a flow diagram for the rainfall and phenological events, as documented for 13 yr in the Mojave desert of southern Nevada.

Page Thumbnails

  • Thumbnail: Page 
856
    856
  • Thumbnail: Page 
857
    857
  • Thumbnail: Page 
858
    858
  • Thumbnail: Page 
859
    859
  • Thumbnail: Page 
860
    860
  • Thumbnail: Page 
861
    861
  • Thumbnail: Page 
862
    862
  • Thumbnail: Page 
863
    863