Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

1 results

  • Growth, population density and population structure of Cetraria nivalis during 240 years of primary colonization

  • Geir HESTMARK, Olav SKOGESAL, Øystein SKULLERUD
  • Journal:
    The Lichenologist / Volume 37 / Issue 6 / November 2005
    Published online by Cambridge University Press:
    27 October 2005, pp. 535-541
    Print publication:
    November 2005

  • The growth of the alpine lichen Cetraria nivalis was followed in a chronosequence of 240 years of primary colonization in a glacier foreland in the Jotunheimen mountain range and National Park in Norway. The largest thallus of C. nivalis was 96 mm in diameter. It was found in the area that had been exposed for a maximum of 240 years. If this individual thallus became established at about the time the habitat was exposed, its average annual diameter increase has been 0·4 mm per year. The growth curve of C. nivalis does however exhibit a pattern of fast growth in the first years followed by a decrease in growth rate. In contrast the population density of C. nivalis increases through time in a linear manner, from 0·4 thalli/m2 in the areas recently exposed to 10·5 thalli/m2 in the sites exposed for maximum of 240 years. This suggests a fairly stable flow of propagules over the landscape through the years. The size distribution (population structure) of thalli within the foreland is skewed, with many small individuals and few big ones.