Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina.
Background and aims: In 2013, blooms similar to those produced by Didymosphenia geminata (Lyngbye) M. Schmidt around the world, were detected in the Grande River basin, Tierra del Fuego province, and in 2014 in de las Vueltas River in Santa Cruz province. The aim of this paper is to analyze the valv...
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| Language: | English |
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Sociedad Argentina de Botánica
2020-11-01
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| Series: | Boletín de la Sociedad Argentina de Botánica |
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| Online Access: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/29634 |
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| author | Noelia Mariel Uyua Silvia E. Sala Norma H. Santinelli Alicia V. Sastre Juan I. Cortés Bibiana Rogel Pedro De Carli |
| author_facet | Noelia Mariel Uyua Silvia E. Sala Norma H. Santinelli Alicia V. Sastre Juan I. Cortés Bibiana Rogel Pedro De Carli |
| author_sort | Noelia Mariel Uyua |
| collection | DOAJ |
| description | Background and aims: In 2013, blooms similar to those produced by Didymosphenia geminata (Lyngbye) M. Schmidt around the world, were detected in the Grande River basin, Tierra del Fuego province, and in 2014 in de las Vueltas River in Santa Cruz province. The aim of this paper is to analyze the valve morphology and morphometry of these materials to establish if they correspond to D. geminata or to other species of the genus that is producing the massive growth in southern Patagonia.
M&M: Samples were collected at Grande River in 2013 and 2015 and, in de las Vueltas River in 2015 and 2016. Samples were analyzed with light and electron microscopy. For morphometric analyses 100 specimens from each sample were measured and statistical analyses were carried out using the R statistical package.
Results: The studied populations have the same fine morphology described for other populations collected in Patagonia. Nevertheless, in some sampling sites from Santa Cruz province, we found a morphotype with a markedly smaller size, subcapitated poles, little marked constrictions of the poles, a broad central area (relative to cell size) and 1 to 3 stigmata, that was never reported in South America.
Conclusions: The studied populations correspond to D. geminata ssp. geminata Metzeltin & Lange-Bertalot. From a morphological point of view the smaller morphotype present in Santa Cruz belongs to the same subspecies but can be easily misidentified during the routine monitoring programs carried out with light microscope due its size and valve outline. |
| first_indexed | 2024-12-11T02:48:32Z |
| format | Article |
| id | doaj.art-427bb82f4e994061a5b26c410f5810a1 |
| institution | Directory Open Access Journal |
| issn | 0373-580X 1851-2372 |
| language | English |
| last_indexed | 2024-12-11T02:48:32Z |
| publishDate | 2020-11-01 |
| publisher | Sociedad Argentina de Botánica |
| record_format | Article |
| series | Boletín de la Sociedad Argentina de Botánica |
| spelling | doaj.art-427bb82f4e994061a5b26c410f5810a12022-12-22T01:23:22ZengSociedad Argentina de BotánicaBoletín de la Sociedad Argentina de Botánica0373-580X1851-23722020-11-01554Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina.Noelia Mariel UyuaSilvia E. Sala0Norma H. Santinelli1Alicia V. Sastre2Juan I. Cortés3Bibiana Rogel4Pedro De Carli5División Ficología, Facultad de Ciencias Naturales y Museo, Univeridad Nacional de La Plata. Paseo del Bosque s/n. La Plata, Buenos Aires, Argentina.Instituto de Investigación de Hidrobiología, Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco. Gales 48.Trelew, Chubut, Argentina. Instituto de Investigación de Hidrobiología, Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco. Gales 48.Trelew, Chubut, Argentina. Centro para el Estudio de Sistemas Marinos (CESIMAR). Centro Nacional Patagónico. CONICET. Boulevard Brown 2915. Puerto Madryn, Chubut, Argentina.Secretaría de Estado de Ambiente de Santa Cruz. Sebastián Elcano 260. Río Gallegos, Santa Cruz, Argentina.Instituto de Ciencias del Ambiente, Sustentabilidad y Recursos Naturales (ICASUR) Universidad Nacional de la Patagonia Austral (UNPA). Av. Lisandro de la Torre 860. Río Gallegos. Santa Cruz. Argentina.Background and aims: In 2013, blooms similar to those produced by Didymosphenia geminata (Lyngbye) M. Schmidt around the world, were detected in the Grande River basin, Tierra del Fuego province, and in 2014 in de las Vueltas River in Santa Cruz province. The aim of this paper is to analyze the valve morphology and morphometry of these materials to establish if they correspond to D. geminata or to other species of the genus that is producing the massive growth in southern Patagonia. M&M: Samples were collected at Grande River in 2013 and 2015 and, in de las Vueltas River in 2015 and 2016. Samples were analyzed with light and electron microscopy. For morphometric analyses 100 specimens from each sample were measured and statistical analyses were carried out using the R statistical package. Results: The studied populations have the same fine morphology described for other populations collected in Patagonia. Nevertheless, in some sampling sites from Santa Cruz province, we found a morphotype with a markedly smaller size, subcapitated poles, little marked constrictions of the poles, a broad central area (relative to cell size) and 1 to 3 stigmata, that was never reported in South America. Conclusions: The studied populations correspond to D. geminata ssp. geminata Metzeltin & Lange-Bertalot. From a morphological point of view the smaller morphotype present in Santa Cruz belongs to the same subspecies but can be easily misidentified during the routine monitoring programs carried out with light microscope due its size and valve outline.https://revistas.unc.edu.ar/index.php/BSAB/article/view/29634diatomsDidymosphenia geminatasouthern Patagoniamorphologyinvasion |
| spellingShingle | Noelia Mariel Uyua Silvia E. Sala Norma H. Santinelli Alicia V. Sastre Juan I. Cortés Bibiana Rogel Pedro De Carli Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. Boletín de la Sociedad Argentina de Botánica diatoms Didymosphenia geminata southern Patagonia morphology invasion |
| title | Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. |
| title_full | Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. |
| title_fullStr | Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. |
| title_full_unstemmed | Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. |
| title_short | Valve morphology of Didymosphenia geminata (Bacillariophyceae) from Santa Cruz and Tierra del Fuego provinces, Patagonia, Argentina. |
| title_sort | valve morphology of didymosphenia geminata bacillariophyceae from santa cruz and tierra del fuego provinces patagonia argentina |
| topic | diatoms Didymosphenia geminata southern Patagonia morphology invasion |
| url | https://revistas.unc.edu.ar/index.php/BSAB/article/view/29634 |
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