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.

If you need an accessible version of this item please contact JSTOR User Support

Analysis of Simple Cave Communities I. Caves as Islands

David C. Culver
Evolution
Vol. 24, No. 2 (Jun., 1970), pp. 463-474
DOI: 10.2307/2406819
Stable URL: http://www.jstor.org/stable/2406819
Page Count: 12
  • Read Online (Free)
  • Download ($4.00)
  • Subscribe ($19.50)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Analysis of Simple Cave Communities I. Caves as Islands
Preview not available

Abstract

The occurrences of Gammarus minus, Stygonectes spinatus, Stygonectes emar ginatus, and Asellus holsingeri in 28 caves in the Greenbrier Valley of West Virginia were recorded. Those caves that are susceptible to spring flooding tend to have fewer species than those that are more isolated from the epigean environment. Spring flooding reflects a rigorous, unstable environment, but a predictable one. Stochastic processes are important in controlling the number of species present in caves, but caves are more than collecting basins for animals that get washed in via subsurface water. Spring flooding reduces the amount of interaction and my data are consistent with Simberloff's (1969) non-interactive equilibrium model of island biogeography, but species interactions may also play a role. The caves studied differ from islands primarily in their lack of area effect and in the nature of the food input. The various explanations of diversity are discussed. Interactions with biological, energetic, and physical aspects of the environment take place against a background of time and stochastic processes.

Page Thumbnails

  • Thumbnail: Page 
463
    463
  • Thumbnail: Page 
464
    464
  • Thumbnail: Page 
465
    465
  • Thumbnail: Page 
466
    466
  • Thumbnail: Page 
467
    467
  • Thumbnail: Page 
468
    468
  • Thumbnail: Page 
469
    469
  • Thumbnail: Page 
470
    470
  • Thumbnail: Page 
471
    471
  • Thumbnail: Page 
472
    472
  • Thumbnail: Page 
473
    473
  • Thumbnail: Page 
474
    474