Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 4 of 4

Full-Text Articles in Life Sciences

Bioinformatic Analysis Of The Metal-Binding Protein Families And Heavy Metal Resistance Amongst Cyanobacteria, Tin-Chun Chu, Lee Lee, Shankar Srinivasan Dec 2004

Bioinformatic Analysis Of The Metal-Binding Protein Families And Heavy Metal Resistance Amongst Cyanobacteria, Tin-Chun Chu, Lee Lee, Shankar Srinivasan

Tin-Chun Chu, Ph.D.

No abstract provided.


Genetic Variation And Migration In The Mexican Free-Tailed Bat (Tadarida Brasiliensis Mexicana), Amy L. Russell, R. A. Medellín, G. F. Mccracken Dec 2004

Genetic Variation And Migration In The Mexican Free-Tailed Bat (Tadarida Brasiliensis Mexicana), Amy L. Russell, R. A. Medellín, G. F. Mccracken

Amy L. Russell

Incomplete lineage sorting can genetically link populations long after they have diverged, and will exert a more powerful influence on larger populations. The effects of this stochastic process can easily be confounded with those of gene flow, potentially leading to inaccurate estimates of dispersal capabilities or erroneous designation of evolutionarily significant units (ESUs). We have used phylogenetic, population genetic, and coalescent methods to examine genetic structuring in large populations of a widely dispersing bat species and to test hypotheses concerning the influences of coalescent stochasticity vs. gene flow. The Mexican free-tailed bat, Tadarida brasiliensis mexicana, exhibits variation in both migra- …


Poor Taxon Sampling, Poor Character Sampling, And Non-Repeatable Analyses Of A Contrived Dataset Do Not Provide A More Credible Estimate Of Insect Phylogeny: A Reply To Kjer., T. Heath Ogden Dec 2004

Poor Taxon Sampling, Poor Character Sampling, And Non-Repeatable Analyses Of A Contrived Dataset Do Not Provide A More Credible Estimate Of Insect Phylogeny: A Reply To Kjer., T. Heath Ogden

T. Heath Ogden

The wealth of data available for phylogenetic analysis of the insect orders, from both morphological and molecular sources, is steadily increasing. However, controversy exists among the methodologies one can use to reconstruct ordinal relationships. Recently, Kjer (2004) presented an analysis of insect ordinal relationships based exclusively on a single source of information: 18S rDNA sequence data. Kjer claims that his analysis resulted in a more ‘‘credible’’ phylogeny for the insect orders and strongly criticized our previous phylogenetic results. However, Kjer only used a subset of the data that are currently available for insect ordinal phylogeny, misrepresented our analyses, and omitted …


Phylogeny Of Ephemeroptera (Mayflies) Based On Molecular Evidence, T. Heath Ogden Dec 2004

Phylogeny Of Ephemeroptera (Mayflies) Based On Molecular Evidence, T. Heath Ogden

T. Heath Ogden

This study represents the Wrst molecular phylogeny for the Order Ephemeroptera. The analyses included 31 of the 37 families, representing »24% of the genera. Fifteen families were supported as being monophyletic, Wve families were supported as nonmonophyletic, and 11 families were only represented by one species, and monophyly was not testable. The suborders Furcatergalia and Carapacea were supported as monophyletic while Setisura and Pisciforma were not supported as monophyletic. The superfamilies Ephemerelloidea and Caenoidea were supported as monophyletic while Baetoidea, Siphlonuroidea, Ephemeroidea, and Heptagenioidea were not. Baetidae was recovered as sister to the remaining clades. The mayXy gill to wing …