Biodiversity and genetic patterns in marine invertebrates
Abstract: Systematics based on genetic data has both confirmed and contradicted earlier, morphologically defined species and their relatedness. Morphology does not always correspond to genetic lineages, and this will inevitably affect both traditional systematics as well as biodiversity assessments....
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | http://hdl.handle.net/2077/23294 |
id |
ftunivgoeteborg:oai:gupea.ub.gu.se:2077/23294 |
---|---|
record_format |
openpolar |
spelling |
ftunivgoeteborg:oai:gupea.ub.gu.se:2077/23294 2023-10-29T02:32:23+01:00 Biodiversity and genetic patterns in marine invertebrates Vodoti, Emma 2010-09-17 application/pdf http://hdl.handle.net/2077/23294 eng eng Sundberg P., Thuroczy Vodoti E., Zhou H., Strand M. (2009) Species limits in ribbon worms (phylum Nemertea) - genetic and morphological polymorphism in the hoplonemertean Oerstedia dorsalis. Biological Journal of the Linnean Society 98: 556-567.:: doi::10.1111/j.1095-8312.2009.01310.x Sundberg P., Thuroczy Vodoti E., Strand M. (2009) DNA barcoding needs taxonomy - the case of Cerebratulus spp (Nemertea). Molecular Ecology Resources 10: 274-281.::doi::10.1111/j.1755-0998.2009.02774.x Thuroczy Vodoti E., Halanych K., Dahlgren T. Phylogeography of the horse mussel Modiolus modiolus. Unpublished manuscript. Thuroczy Vodoti E., Bergström B. Antarctic krill genealogy reveals a small effective population size and a history of high mobility in the Atlantic sector of the Southern Ocean. Unpublished manuscript. 978-91-628-7913-6 http://hdl.handle.net/2077/23294 zoology marine biodiversity Text Doctoral Theses Doctor of Philosophy 2010 ftunivgoeteborg 2023-10-04T21:12:16Z Abstract: Systematics based on genetic data has both confirmed and contradicted earlier, morphologically defined species and their relatedness. Morphology does not always correspond to genetic lineages, and this will inevitably affect both traditional systematics as well as biodiversity assessments. My thesis aims to investigate genetic biodiversity in some marine invertebrates, dealing with both species and population (intraspecific) relationships. I discuss gene lineage relatedness in correlation to species morphs and geographical species distribution, which has bearing upon the species recognition problem, the barcoding approach and the meaning of phylogeographic patterns. Results show that morphology does not generally reflect gene lineage relationships in the considered species and that cryptic species are common, mainly in the nemertean groups studied (Oerstedia dorsalis; Cerebratulus spp). Despite having a relatively established status as a species, the horse mussel (Modiolus modiolus) is also found to hold cryptic lineages. Further, the difficulties in species delimitation become apparent, as an almost continuous range of genetic divergence prevails between most of the found clades. The Antarctic krill (Euphausia superba) is the only study species lacking cryptisism, at least in the samples and geographical region studied. The intraspecific genealogies were in this case used to estimate population parameters by means of the coalescent. Despite being an abundant species of modest size, results suggest a low effective population size and a population with common ancestry, most likely capable of migrating over relatively great distances. This stresses that factors such as demography and genetics can provide a preliminary, general base for management issues. I conclude that cryptic species are common, and therefore taxonomic work cannot be isolated from the barcoding quest of summoning genetic data for species identification. Since genetic relationships and morphological traits do not always go hand in hand, ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Krill Euphausia superba Modiolus modiolus University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
institution |
Open Polar |
collection |
University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
op_collection_id |
ftunivgoeteborg |
language |
English |
topic |
zoology marine biodiversity |
spellingShingle |
zoology marine biodiversity Vodoti, Emma Biodiversity and genetic patterns in marine invertebrates |
topic_facet |
zoology marine biodiversity |
description |
Abstract: Systematics based on genetic data has both confirmed and contradicted earlier, morphologically defined species and their relatedness. Morphology does not always correspond to genetic lineages, and this will inevitably affect both traditional systematics as well as biodiversity assessments. My thesis aims to investigate genetic biodiversity in some marine invertebrates, dealing with both species and population (intraspecific) relationships. I discuss gene lineage relatedness in correlation to species morphs and geographical species distribution, which has bearing upon the species recognition problem, the barcoding approach and the meaning of phylogeographic patterns. Results show that morphology does not generally reflect gene lineage relationships in the considered species and that cryptic species are common, mainly in the nemertean groups studied (Oerstedia dorsalis; Cerebratulus spp). Despite having a relatively established status as a species, the horse mussel (Modiolus modiolus) is also found to hold cryptic lineages. Further, the difficulties in species delimitation become apparent, as an almost continuous range of genetic divergence prevails between most of the found clades. The Antarctic krill (Euphausia superba) is the only study species lacking cryptisism, at least in the samples and geographical region studied. The intraspecific genealogies were in this case used to estimate population parameters by means of the coalescent. Despite being an abundant species of modest size, results suggest a low effective population size and a population with common ancestry, most likely capable of migrating over relatively great distances. This stresses that factors such as demography and genetics can provide a preliminary, general base for management issues. I conclude that cryptic species are common, and therefore taxonomic work cannot be isolated from the barcoding quest of summoning genetic data for species identification. Since genetic relationships and morphological traits do not always go hand in hand, ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Vodoti, Emma |
author_facet |
Vodoti, Emma |
author_sort |
Vodoti, Emma |
title |
Biodiversity and genetic patterns in marine invertebrates |
title_short |
Biodiversity and genetic patterns in marine invertebrates |
title_full |
Biodiversity and genetic patterns in marine invertebrates |
title_fullStr |
Biodiversity and genetic patterns in marine invertebrates |
title_full_unstemmed |
Biodiversity and genetic patterns in marine invertebrates |
title_sort |
biodiversity and genetic patterns in marine invertebrates |
publishDate |
2010 |
url |
http://hdl.handle.net/2077/23294 |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Modiolus modiolus |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Modiolus modiolus |
op_relation |
Sundberg P., Thuroczy Vodoti E., Zhou H., Strand M. (2009) Species limits in ribbon worms (phylum Nemertea) - genetic and morphological polymorphism in the hoplonemertean Oerstedia dorsalis. Biological Journal of the Linnean Society 98: 556-567.:: doi::10.1111/j.1095-8312.2009.01310.x Sundberg P., Thuroczy Vodoti E., Strand M. (2009) DNA barcoding needs taxonomy - the case of Cerebratulus spp (Nemertea). Molecular Ecology Resources 10: 274-281.::doi::10.1111/j.1755-0998.2009.02774.x Thuroczy Vodoti E., Halanych K., Dahlgren T. Phylogeography of the horse mussel Modiolus modiolus. Unpublished manuscript. Thuroczy Vodoti E., Bergström B. Antarctic krill genealogy reveals a small effective population size and a history of high mobility in the Atlantic sector of the Southern Ocean. Unpublished manuscript. 978-91-628-7913-6 http://hdl.handle.net/2077/23294 |
_version_ |
1781053736193359872 |