| species diversity can drive speciation. | a fundamental question in evolutionary ecology and conservation biology is: why do some areas contain greater species diversity than others? island biogeographic theory has identified the roles of immigration and extinction in relation to area size and proximity to source areas, and the role of speciation is also recognized as an important factor. however, one as yet unexplored possibility is that species diversity itself might help to promote speciation, and indeed the central tenets of island ... | 2005 | 15846345 |
| genetic diversity of frankia microsymbionts from the relict species myrica faya (ait.) and myrica rivas-martinezii (s.) in canary islands and hawaii. | in the western canary islands, myrica faya and myrica rivas-martinezii (myricaceae) are phylogenetically close, endemic, actinorhizal species presumed to be remnants either of the european or the african tertiary floras. unisolated frankia strains from field-collected nodules on tenerife, gomera, and la palma islands were compared by their rrs gene and 16s-23s intergenic spacer (igs) restriction patterns. to compare the genetic diversity of frankia strains from within and outside the host's nati ... | 2005 | 16047099 |
| antigenic and genetic characterization of an avian poxvirus isolated from an endangered hawaiian goose (branta sandvicensis). | an avian poxvirus from cutaneous lesions in a hawaiian goose (branta sandvicensis) was characterized in this study. the virus was isolated by inoculation onto the chorioallantoic membranes (cams) of developing chicken embryos. cytoplasmic inclusion bodies were observed on histopathological examination of cam lesions. western blotting analysis using polyclonal antiserum against fowl poxvirus (fwpv) showed differences from fwpv, but a similar antigenic profile between hawaiian goosepox (hgp) isola ... | 2006 | 16617975 |