Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas
[eng] The Antarctic bottoms harbour rich communities of sponges, which play an important role in structuring benthic habitats. Many Antarctic sponge species have been discovered in the past but most of them were poorly described or incorrectly ascribed to species or genera. Thus, the biodiversity th...
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Online Access: | http://hdl.handle.net/2445/125028 http://hdl.handle.net/10803/662934 |
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ftubarcepubl:oai:diposit.ub.edu:2445/125028 2024-02-11T09:56:11+01:00 Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas Carella, Mirco Uriz Lespe, María Jesús Universitat de Barcelona. Facultat de Biologia 2018-07-13 233 p. application/pdf http://hdl.handle.net/2445/125028 http://hdl.handle.net/10803/662934 eng eng Universitat de Barcelona Tesis Doctorals - Facultat - Biologia http://hdl.handle.net/2445/125028 http://hdl.handle.net/10803/662934 (c) Carella,, 2018 info:eu-repo/semantics/openAccess Esponges Genòmica Antàrtic Oceà Sponges Genomics Antarctic Ocean info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion 2018 ftubarcepubl 2024-01-24T01:04:48Z [eng] The Antarctic bottoms harbour rich communities of sponges, which play an important role in structuring benthic habitats. Many Antarctic sponge species have been discovered in the past but most of them were poorly described or incorrectly ascribed to species or genera. Thus, the biodiversity this area is still incompletely explored. However, in the last 20 years the taxonomic and ecological studies of marine benthic invertebrates have benefited from the use of molecular tools, such a mitochondrial and nuclear markers or species-specific markers obtained from sequencing a part of the sponge genome. The present thesis contributed to improve the systematic of an Antarctic sponge group and its phylogenetic relationships with other members of the family (Tetillidae) spread all over the world, and to assess the asexual reproduction rate of an Antarctic sponge species (Stylocordyla chupachups). The phylogeny of Tetillidae has been previously approached using several nuclear and mitochondrial markers but including an incomplete number of Antarctic species. This study, did not resolve completely the family phylogeny and lacked a deep morphological revision of the species sequenced. Hence, in this thesis we performed a new phylogenetic analysis of the family by adding more Antarctic specimens and additional mitochondrial and nuclear markers. Moreover, the morphological characters plus the secondary structure of the (V4) region of the 18S rDNA were analyzed under the principle of maximum parsimony. The resulting trees retrieved seven monophyletic well-supported clades in both the molecular and morphological phylogenies, which correspond to the genera: Cinachyra, Acanthotetilla, Tetilla, Cinachyrella, Craniella, Antarctotetilla and Levantiniella. However, the mitochondrial and nuclear markers used were very conserved and could not discriminate Antarctic species of their corresponding genera (Antarctotetilla and Cinachyra). The revision of the species type of Tethya coactifera and Tethya crassispicula with the COI ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Ocean Dipòsit Digital de la Universitat de Barcelona Antarctic The Antarctic Antarctic Ocean |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Esponges Genòmica Antàrtic Oceà Sponges Genomics Antarctic Ocean |
spellingShingle |
Esponges Genòmica Antàrtic Oceà Sponges Genomics Antarctic Ocean Carella, Mirco Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
topic_facet |
Esponges Genòmica Antàrtic Oceà Sponges Genomics Antarctic Ocean |
description |
[eng] The Antarctic bottoms harbour rich communities of sponges, which play an important role in structuring benthic habitats. Many Antarctic sponge species have been discovered in the past but most of them were poorly described or incorrectly ascribed to species or genera. Thus, the biodiversity this area is still incompletely explored. However, in the last 20 years the taxonomic and ecological studies of marine benthic invertebrates have benefited from the use of molecular tools, such a mitochondrial and nuclear markers or species-specific markers obtained from sequencing a part of the sponge genome. The present thesis contributed to improve the systematic of an Antarctic sponge group and its phylogenetic relationships with other members of the family (Tetillidae) spread all over the world, and to assess the asexual reproduction rate of an Antarctic sponge species (Stylocordyla chupachups). The phylogeny of Tetillidae has been previously approached using several nuclear and mitochondrial markers but including an incomplete number of Antarctic species. This study, did not resolve completely the family phylogeny and lacked a deep morphological revision of the species sequenced. Hence, in this thesis we performed a new phylogenetic analysis of the family by adding more Antarctic specimens and additional mitochondrial and nuclear markers. Moreover, the morphological characters plus the secondary structure of the (V4) region of the 18S rDNA were analyzed under the principle of maximum parsimony. The resulting trees retrieved seven monophyletic well-supported clades in both the molecular and morphological phylogenies, which correspond to the genera: Cinachyra, Acanthotetilla, Tetilla, Cinachyrella, Craniella, Antarctotetilla and Levantiniella. However, the mitochondrial and nuclear markers used were very conserved and could not discriminate Antarctic species of their corresponding genera (Antarctotetilla and Cinachyra). The revision of the species type of Tethya coactifera and Tethya crassispicula with the COI ... |
author2 |
Uriz Lespe, María Jesús Universitat de Barcelona. Facultat de Biologia |
format |
Doctoral or Postdoctoral Thesis |
author |
Carella, Mirco |
author_facet |
Carella, Mirco |
author_sort |
Carella, Mirco |
title |
Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
title_short |
Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
title_full |
Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
title_fullStr |
Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
title_full_unstemmed |
Patterns of genetic and morphologic diversity in Antarctic sponges = Modelos de diversidad genética y morfológicas en las esponjas antárcticas |
title_sort |
patterns of genetic and morphologic diversity in antarctic sponges = modelos de diversidad genética y morfológicas en las esponjas antárcticas |
publisher |
Universitat de Barcelona |
publishDate |
2018 |
url |
http://hdl.handle.net/2445/125028 http://hdl.handle.net/10803/662934 |
geographic |
Antarctic The Antarctic Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_relation |
Tesis Doctorals - Facultat - Biologia http://hdl.handle.net/2445/125028 http://hdl.handle.net/10803/662934 |
op_rights |
(c) Carella,, 2018 info:eu-repo/semantics/openAccess |
_version_ |
1790601265382686720 |