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 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.

Rapid Population Increases in Native Vascular Plants in the Argentine Islands, Antarctic Peninsula

John A. Fowbert and Ronald I. Lewis Smith
Arctic and Alpine Research
Vol. 26, No. 3 (Aug., 1994), pp. 290-296
DOI: 10.2307/1551941
Stable URL: http://www.jstor.org/stable/1551941
Page Count: 7
  • Read Online (Free)
  • Subscribe ($19.50)
  • 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.
Rapid Population Increases in Native Vascular Plants in the Argentine Islands, Antarctic Peninsula
Preview not available

Abstract

The number of individual plants and colonies of the two native Antarctic vascular plants, Colobanthus quitensis and Deschampsia antarctica, have been monitored between 1964 and 1990 on three islands in the Argentine Islands archipelago, western Antarctic Peninsula. The Deschampsia population increased by nearly 25-fold and Colobanthus by over 5-fold. Furthermore there was a considerable increase in the number of Deschampsia colonies, although no additional colonies of Colobanthus were recorded. An analysis of Colobanthus plant size in 1974 and 1990 indicated that recruitment was probably irregular although the population structure remained essentially the same. The reasons for this and the increases in population size of both species are discussed. The relatively rapid increase in the abundance and distribution of these species is considered to be a response to the increasing summer air temperatures being experienced in the region of the maritime Antarctic. In particular, there is probably improved success in reproductive behavior resulting from warmer and/or longer growing seasons.

Page Thumbnails

  • Thumbnail: Page 
290
    290
  • Thumbnail: Page 
291
    291
  • Thumbnail: Page 
292
    292
  • Thumbnail: Page 
293
    293
  • Thumbnail: Page 
294
    294
  • Thumbnail: Page 
295
    295
  • Thumbnail: Page 
296
    296