Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species
Many macroalgae exhibit considerable intraspecific morphological variation, but whether such variation reflects phenotypic plasticity or underlying genetic differences is often poorly understood. We quantified both morphological and genetic variation of 96 plants from seven field sites across easter...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Blackwell Publishing Ltd
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/1885/79822 |
id |
ftanucanberra:oai:digitalcollections.anu.edu.au:1885/79822 |
---|---|
record_format |
openpolar |
spelling |
ftanucanberra:oai:digitalcollections.anu.edu.au:1885/79822 2023-05-15T13:56:44+02:00 Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species Fraser, Ceridwen Hay, Cameron H. Spencer, Hamish Waters, Jonathan 2015-12-13T22:45:31Z http://hdl.handle.net/1885/79822 unknown Blackwell Publishing Ltd 0022-3646 http://hdl.handle.net/1885/79822 Journal of Phycology Journal article 2015 ftanucanberra 2015-12-21T23:52:15Z Many macroalgae exhibit considerable intraspecific morphological variation, but whether such variation reflects phenotypic plasticity or underlying genetic differences is often poorly understood. We quantified both morphological and genetic variation of 96 plants from seven field sites across eastern South Island, New Zealand, to assess genetic differences between morphotypes of the southern bull kelp Durvillaea antarctica (Cham.) Har. Consistent DNA sequence differentiation across mitochondrial, plastid, and nuclear loci was correlated with two broadly sympatric morphotypes: "cape" and "thonged." These ecologically, morphologically, and genetically distinct bull-kelp lineages were previously considered to be environmentally determined phenotypes with no underlying genetic basis. Interestingly, the sheltered "cape" lineage appears essentially genetically uniform across its South Island range, whereas the exposed "thonged" lineage exhibits marked phylogeographic structure across its range. Results suggest that D. antarctica in New Zealand comprises two reproductively isolated species. Article in Journal/Newspaper Antarc* Antarctica Australian National University: ANU Digital Collections New Zealand |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Many macroalgae exhibit considerable intraspecific morphological variation, but whether such variation reflects phenotypic plasticity or underlying genetic differences is often poorly understood. We quantified both morphological and genetic variation of 96 plants from seven field sites across eastern South Island, New Zealand, to assess genetic differences between morphotypes of the southern bull kelp Durvillaea antarctica (Cham.) Har. Consistent DNA sequence differentiation across mitochondrial, plastid, and nuclear loci was correlated with two broadly sympatric morphotypes: "cape" and "thonged." These ecologically, morphologically, and genetically distinct bull-kelp lineages were previously considered to be environmentally determined phenotypes with no underlying genetic basis. Interestingly, the sheltered "cape" lineage appears essentially genetically uniform across its South Island range, whereas the exposed "thonged" lineage exhibits marked phylogeographic structure across its range. Results suggest that D. antarctica in New Zealand comprises two reproductively isolated species. |
format |
Article in Journal/Newspaper |
author |
Fraser, Ceridwen Hay, Cameron H. Spencer, Hamish Waters, Jonathan |
spellingShingle |
Fraser, Ceridwen Hay, Cameron H. Spencer, Hamish Waters, Jonathan Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
author_facet |
Fraser, Ceridwen Hay, Cameron H. Spencer, Hamish Waters, Jonathan |
author_sort |
Fraser, Ceridwen |
title |
Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
title_short |
Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
title_full |
Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
title_fullStr |
Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
title_full_unstemmed |
Genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: Durvillaeales) in New Zealand reveal cryptic species |
title_sort |
genetic and morphological analyses of the southern bull kelp durvillaea antarctica (phaeophyceae: durvillaeales) in new zealand reveal cryptic species |
publisher |
Blackwell Publishing Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/79822 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Phycology |
op_relation |
0022-3646 http://hdl.handle.net/1885/79822 |
_version_ |
1766264318991532032 |