Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current)
Limpets are keystone species on the intertidal communities because of their constant grazing, but their diversity and taxonomy are poorly assessed, particularly along the African shores. In this study specimens of the Patellidae family collected along the southwestern coast of Africa and from north...
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/17471 2023-05-15T17:32:08+02:00 Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) Carneiro, Ana Pinto Serrão, Ester Neiva, João 2021-10-20 http://hdl.handle.net/10400.1/17471 eng eng http://hdl.handle.net/10400.1/17471 202807622 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Patellogastropoda DNA barcoding True limpets Philogeny Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais masterThesis 2021 ftunivalgarve 2022-07-06T00:01:19Z Limpets are keystone species on the intertidal communities because of their constant grazing, but their diversity and taxonomy are poorly assessed, particularly along the African shores. In this study specimens of the Patellidae family collected along the southwestern coast of Africa and from north Atlantic were barcoded for the mitochondrial gene cytochrome c oxidase subunit I (COI). Genetic data and literature surveys were used to generate distribution maps of the identified species, to understand the range of each species within these regions. Phylogenetic analyses based on available GenBank sequences were also conducted to further explore species relationships. From the samples collected, 72 DNA sequences were obtained, of which 9 different species of the family Patellidae were identified. At least one species of each genus was recognized, in addition to 2 Siphonariidae and 1 Fissurellidae limpets. Patella was only found in the North Atlantic. Cymbula and Helcion were restricted to Southern Africa, with Cymbula safiana being the only species with a distribution reaching north of Africa. Only one Scutellastra was identified in Africa, but we cannot confirm through genetic data its widest distribution, documented to reach from South Africa to Australia. Multivariate analysis showed important regional differences in species composition along the Eastern Atlantic coast. Three different groups were recognized: 1) South Africa and Namibia; 2) Angola and Tropical Africa; and 3) Northeast Atlantic and Mediterranean Sea. Phylogenetic analyses are in line with previous studies. Patella genus forming a well-supported clade, with Cymbula and Helcion sharing the same branch as sister taxa, and Scutellastra subdivided in paraphyletic biogeographic lineages. One lineage formed a clade with Cymbula and Helcion. We can conclude that are still needed a revision on the taxonomy and distribution of the Patellidae family, particularly on the African coasts. As lapas da ordem Patellogastropoda, ou verdadeiras lapas, são ... Master Thesis North Atlantic Northeast Atlantic Universidade do Algarve: Sapienta |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Patellogastropoda DNA barcoding True limpets Philogeny Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais |
spellingShingle |
Patellogastropoda DNA barcoding True limpets Philogeny Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais Carneiro, Ana Pinto Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
topic_facet |
Patellogastropoda DNA barcoding True limpets Philogeny Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais |
description |
Limpets are keystone species on the intertidal communities because of their constant grazing, but their diversity and taxonomy are poorly assessed, particularly along the African shores. In this study specimens of the Patellidae family collected along the southwestern coast of Africa and from north Atlantic were barcoded for the mitochondrial gene cytochrome c oxidase subunit I (COI). Genetic data and literature surveys were used to generate distribution maps of the identified species, to understand the range of each species within these regions. Phylogenetic analyses based on available GenBank sequences were also conducted to further explore species relationships. From the samples collected, 72 DNA sequences were obtained, of which 9 different species of the family Patellidae were identified. At least one species of each genus was recognized, in addition to 2 Siphonariidae and 1 Fissurellidae limpets. Patella was only found in the North Atlantic. Cymbula and Helcion were restricted to Southern Africa, with Cymbula safiana being the only species with a distribution reaching north of Africa. Only one Scutellastra was identified in Africa, but we cannot confirm through genetic data its widest distribution, documented to reach from South Africa to Australia. Multivariate analysis showed important regional differences in species composition along the Eastern Atlantic coast. Three different groups were recognized: 1) South Africa and Namibia; 2) Angola and Tropical Africa; and 3) Northeast Atlantic and Mediterranean Sea. Phylogenetic analyses are in line with previous studies. Patella genus forming a well-supported clade, with Cymbula and Helcion sharing the same branch as sister taxa, and Scutellastra subdivided in paraphyletic biogeographic lineages. One lineage formed a clade with Cymbula and Helcion. We can conclude that are still needed a revision on the taxonomy and distribution of the Patellidae family, particularly on the African coasts. As lapas da ordem Patellogastropoda, ou verdadeiras lapas, são ... |
author2 |
Serrão, Ester Neiva, João |
format |
Master Thesis |
author |
Carneiro, Ana Pinto |
author_facet |
Carneiro, Ana Pinto |
author_sort |
Carneiro, Ana Pinto |
title |
Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
title_short |
Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
title_full |
Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
title_fullStr |
Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
title_full_unstemmed |
Diversity and distribuition of patellid limpets along the southwestern African coast (Benguela current) |
title_sort |
diversity and distribuition of patellid limpets along the southwestern african coast (benguela current) |
publishDate |
2021 |
url |
http://hdl.handle.net/10400.1/17471 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
http://hdl.handle.net/10400.1/17471 202807622 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766130082453127168 |