Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/3717 |
Resumo: | Abstract: A new benthic freshwater diatom species belonging to the genus Achnanthidium Kütz. has been recorded from several watercourses in the North of Portugal. Achnanthidium caravelense Novais et Ector is described as a new species based on light and scanning electron microscopic observations, as well as on its ecological preferences as reconstructed from field observations. The most characteristic morphological features of this species are the different outline of the raphe valve (narrowly elliptic with linear margins) and the rapheless valve (narrowly elliptic to narrowly rhombic with moderately convex margins), the non-protracted broadly rounded apices and the length/width ratio. Furthermore, the areolae of the single row along the mantle are elongated and are more or less widely open, which is a characteristic discernible in girdle view under light microscopy. The species that A. caravelense resembles most is A. eutrophilum (Lange-Bert.) Lange-Bert.; nevertheless it can be distinguished from the latter by the different raphe valve outline, its higher valve length/width ratio and autecology. A. caravelense is common and abundant in soft waters with low to moderate nutrient content in the North of Portugal. |
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Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese riversAchnanthidium caravelenseAchnanthidium eutrophilumBacillariophyceae,ecologymorphologynew speciesPortugalultrastructureAbstract: A new benthic freshwater diatom species belonging to the genus Achnanthidium Kütz. has been recorded from several watercourses in the North of Portugal. Achnanthidium caravelense Novais et Ector is described as a new species based on light and scanning electron microscopic observations, as well as on its ecological preferences as reconstructed from field observations. The most characteristic morphological features of this species are the different outline of the raphe valve (narrowly elliptic with linear margins) and the rapheless valve (narrowly elliptic to narrowly rhombic with moderately convex margins), the non-protracted broadly rounded apices and the length/width ratio. Furthermore, the areolae of the single row along the mantle are elongated and are more or less widely open, which is a characteristic discernible in girdle view under light microscopy. The species that A. caravelense resembles most is A. eutrophilum (Lange-Bert.) Lange-Bert.; nevertheless it can be distinguished from the latter by the different raphe valve outline, its higher valve length/width ratio and autecology. A. caravelense is common and abundant in soft waters with low to moderate nutrient content in the North of Portugal.Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany2012-01-17T16:44:59Z2012-01-172011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/3717http://hdl.handle.net/10174/3717porNOVAIS M. H., D. HLÚBIKOVÁ, M. MORAIS, L. HOFFMANN & L. ECTOR, 2011 - Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers. Algological Studies, 136: 131-150Algological StudiesCentro Geofísica Évora (CGE)hnovais@uevora.ptndmmorais@uevora.ptndector@lippmann.lu221NOVAIS, M. HHLÚBIKOVÁ, D.MORAIS, M.HOFFMANN, L.ECTOR, L.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:41:12Zoai:dspace.uevora.pt:10174/3717Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:59:10.440988Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
title |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
spellingShingle |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers NOVAIS, M. H Achnanthidium caravelense Achnanthidium eutrophilum Bacillariophyceae, ecology morphology new species Portugal ultrastructure |
title_short |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
title_full |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
title_fullStr |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
title_full_unstemmed |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
title_sort |
Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers |
author |
NOVAIS, M. H |
author_facet |
NOVAIS, M. H HLÚBIKOVÁ, D. MORAIS, M. HOFFMANN, L. ECTOR, L. |
author_role |
author |
author2 |
HLÚBIKOVÁ, D. MORAIS, M. HOFFMANN, L. ECTOR, L. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
NOVAIS, M. H HLÚBIKOVÁ, D. MORAIS, M. HOFFMANN, L. ECTOR, L. |
dc.subject.por.fl_str_mv |
Achnanthidium caravelense Achnanthidium eutrophilum Bacillariophyceae, ecology morphology new species Portugal ultrastructure |
topic |
Achnanthidium caravelense Achnanthidium eutrophilum Bacillariophyceae, ecology morphology new species Portugal ultrastructure |
description |
Abstract: A new benthic freshwater diatom species belonging to the genus Achnanthidium Kütz. has been recorded from several watercourses in the North of Portugal. Achnanthidium caravelense Novais et Ector is described as a new species based on light and scanning electron microscopic observations, as well as on its ecological preferences as reconstructed from field observations. The most characteristic morphological features of this species are the different outline of the raphe valve (narrowly elliptic with linear margins) and the rapheless valve (narrowly elliptic to narrowly rhombic with moderately convex margins), the non-protracted broadly rounded apices and the length/width ratio. Furthermore, the areolae of the single row along the mantle are elongated and are more or less widely open, which is a characteristic discernible in girdle view under light microscopy. The species that A. caravelense resembles most is A. eutrophilum (Lange-Bert.) Lange-Bert.; nevertheless it can be distinguished from the latter by the different raphe valve outline, its higher valve length/width ratio and autecology. A. caravelense is common and abundant in soft waters with low to moderate nutrient content in the North of Portugal. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01T00:00:00Z 2012-01-17T16:44:59Z 2012-01-17 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/3717 http://hdl.handle.net/10174/3717 |
url |
http://hdl.handle.net/10174/3717 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
NOVAIS M. H., D. HLÚBIKOVÁ, M. MORAIS, L. HOFFMANN & L. ECTOR, 2011 - Morphology and ecology of Achnanthidium caravelensis (Bacillariophyceae), a new species from Portuguese rivers. Algological Studies, 136: 131-150 Algological Studies Centro Geofísica Évora (CGE) hnovais@uevora.pt nd mmorais@uevora.pt nd ector@lippmann.lu 221 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany |
publisher.none.fl_str_mv |
Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136474461896704 |