Oecologia

, Volume 65, Issue 1, pp 82–85

Prey refugia and the distributions of two Sonoran Desert cacti

  • Joseph R. McAuliffe
Original Papers

DOI: 10.1007/BF00384466

Cite this article as:
McAuliffe, J.R. Oecologia (1984) 65: 82. doi:10.1007/BF00384466

Summary

Two small Sonoran Desert cacti, Mammillaria microcarpa and Echinocereus englemannii, are commonly found beneath canopies of the larger, tree-like cactus Opuntia fulgida. The mechanism leading to this distribution pattern is incidental to the mode of reproduction in O. fulgida. Opuntia fulgida propagates by means of easily-detached, spine-covered stem joints that accumulate beneath the parent plant. These accumulations of spines apparently deter mammalian herbivores that otherwise consume succulent tissues of the smaller cacti. Such incidental effects are little studied, but they may contribute substantially to structure within plant communities.

Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • Joseph R. McAuliffe
    • 1
  1. 1.Department of Ecology and Evolutionary BiologyUniversity of ArizonaTucsonUSA