Biogeographic patterns and cryptic speciation in bryophytes

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.

Download / Buy Article:

Abstract:

Bryophytes (mosses, liverworts, hornworts) typically have broad geographical distributions that span two or more continents. Many species show classic patterns of disjunction that are similar to those found in many other groups of organisms (e.g. eastern Asia–eastern North America), and which are thought to result from fragmentation of previously continuous ranges (i.e. vicariance). However, in the bryophytes, these disjunctions often occur at the infra-specific level and suggest that morphological uniformity may belie complex underlying genetic structure. Recent demonstrations of cryptic speciation, revealed by analyses of isozymes and DNA sequence variation, support the interpretation that genetic subdivision has occurred within some morphologically uniform species. Evidence for cryptic or nearly cryptic speciation exists for seven species of liverworts and seven mosses. In most (but not all) cases, cryptic species have broadly overlapping geographical ranges, although many are ecologically differentiated. Future work should focus on species that display `classic' patterns of disjunction at higher taxonomic levels in other organisms (e.g. eastern North America–eastern Asia, eastern or western North America–Europe, Gondwanic), and should utilize explicitly phylogenetic approaches.

Keywords: Bryophytes; DNA sequence variation; cryptic speciation; disjunctions; isozymes; liverworts; mosses

Document Type: Research Article

Publication date: February 1, 2001

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