If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Altitudinal zonation of Andean cryptogam communities

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Abstract

To test whether cryptogamic plant communities in tropical Andean rain forests are distributed in floristically discrete communities corresponding to altitudinal belts, I subjected the elevational distribution of pteridophytes along two elevational gradients in Bolivia, and of bryophytes and lichens along two transects in Peru and Colombia (data from Gradstein & Frahm, 1987; Wolf, 1993) to an analysis of deviance. All well-defined elevational boundaries in floristic composition were related to marked ecological changes: the transition from the steep mountains to the hilly lowland zone coupled with a change in geological substrate at 400 m along the Bolivian Carrasco transect, a strong humidity gradient at 1000 m at the Bolivian Masicurí transect and at 1250–1980 m along the Colombian transect, and the transition from mixed cloud forests to forests dominated by Polylepis or Podocarpus at 3400–3600 m in Carrasco, at 1650–1800 m in Masicurí, and at 3670 m in Colombia. Consequently, floristic elevational belts appear to be well-defined at strong environmental boundaries and in fairly species-poor forest communities where the presence or absence of one or a few tree species influences the whole ecosystem while they are ill-defined in species-rich communities such as tropical forests at low to mid-elevations.

Keywords: Altitudinal zonation; bryophytes; continuum concept; cryptogams; pteridophytes; tropical mountains

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1365-2699.2000.00399.x

Publication date: March 1, 2000

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more