Format

Send to

Choose Destination
See comment in PubMed Commons below
Am Nat. 2005 Sep;166(3):418-25. Epub 2005 Jun 28.

Environment, area, and diversification in the species-rich flowering plant family Iridaceae.

Author information

1
Division of Biology and Natural Environmental Research Council Centre for Population Biology, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, United Kingdom. j.davies@virginia.edu

Abstract

Phylogenetic analyses provide a means to explore evolutionary explanations for regional variation in species richness. The environment might also explain much of the previously unexplained imbalance of phylogenetic trees. We use data on geographic distribution and phylogenetic affinity to examine correlates of species richness among genera of irises (family: Iridaceae). Irises display strong phylogenetic imbalance, with a few clades containing a disproportionate number of species, most notably those found in the dry Mediterranean climate of the Cape of South Africa. The abiotic environment and area are strong predictors of iris species richness, but environment alone is insufficient to explain the high diversity of Cape clades. One possible explanation is that the interaction between biological traits and environment resulted in the unusually high diversification rates in the region.

PMID:
16224695
DOI:
10.1086/432022
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for University of Chicago Press
    Loading ...
    Support Center