Skip to main content

Phylogeographic Patterns in Two Southern Hemisphere Species of Calyptrochaeta (Daltoniaceae, Bryophyta)

Buy Article:

$23.00 plus tax (Refund Policy)

Abstract:

To better understand biogeographic patterns in the Southern Hemisphere, infraspecific molecular patterns were compared in two species of the moss genus Calyptrochaeta with contrasting distributions. One, C. apiculata, has a disjunct distribution encompassing South America and Australasia, and the other, C. asplenioides, occurs from South Africa northward to Rwanda and eastward into the Indian Ocean Islands. Nucleotide sequence data from two plastid loci (trnL-F and trnG) and nuclear ribosomal DNA (ITS1–2) were gathered from 62 samples representing the genera Calyptrochaeta and Daltonia (the latter as an outgroup), and subjected to phylogenetic analyses using maximum likelihood and Bayesian inference. The phylogenetic analyses revealed strong, geographically correlated structure within C. asplenioides in which populations from southern Africa are sister to those from eastern Africa, Madagascar, and the other Indian Ocean islands. Continental plants are further differentiated from island plants to the east. Divergence times suggest that C. asplenioides diversified in a time frame that does not support vicariance associated with continental drift, but rather dispersal, to explain the disjunct distribution of this species. Sequences of C. apiculata disjunct between Chile and Australia are nearly identical, which strongly suggests recent and/or ongoing gene flow. Our dating suggests that the South American-Australian disjunction of C. apiculata is also not old enough to reflect vicariance associated with continental drift. Thus, in both cases, recent long distance dispersal best explains their distributions in the Southern Hemisphere.

Keywords: BRYOPHYTES; CHLOROPLAST AND NUCLEAR DNA; CRYPTIC SPECIATION; DIVERGENCE TIMES; LONG DISTANCE DISPERSAL; PHYLOGEOGRAPHY

Document Type: Regular Paper

DOI: https://doi.org/10.1600/036364411X583529

Publication date: 2011-07-01

More about this publication?
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect 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