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dc.contributor.author
Poza, Ailen Melisa  
dc.contributor.author
Gauna, Maria Cecilia  
dc.contributor.author
Escobar, Juan Francisco  
dc.contributor.author
Parodi, Elisa Rosalia  
dc.date.available
2017-11-02T20:12:04Z  
dc.date.issued
2017-09  
dc.identifier.citation
Poza, Ailen Melisa; Gauna, Maria Cecilia; Escobar, Juan Francisco; Parodi, Elisa Rosalia; Heteromorphic phases of Leathesia marina (Ectocarpales, Ochrophyta) over time from northern Patagonia, Argentina; Int Phycological Soc; Phycologia; 56; 5; 9-2017; 579-589  
dc.identifier.issn
0031-8884  
dc.identifier.uri
http://hdl.handle.net/11336/27465  
dc.description.abstract
The emergence and evolution of the heteromorphic life history in algae has been considered as a response to the selective pressures of changing environments. The brown alga Leathesia marina has a typical heteromorphic life history, alternating between microscopic branched filaments (gametophytic phase) and a macroscopic erect stage (sporophytic phase). The first aim of this study was to describe vegetative and reproductive morphologies of sporophytes (macrothalli and diploid phase) of L. marina and their relationship with environmental factors in an annual cycle. The second aim was to report the discovery of gametophytes (microthalli and haploid phase) in the natural environment on northern Patagonian coasts, and to describe their morphology, abundance and reproductive output. The macroscopic phase was observed over 8 months, from September to April during the warm season. The microscopic phase was observed in two periods, March–April and September–October. A temporal overlap was observed between the microscopic and macroscopic phases. The population of macrothalli had a type III survivorship curve. The cover, density and size of macrothalli were associated with warmer months, but the abundance of microthalli and reproductive output of both phases were higher in temperate periods. Demographic parameters, including mortality rate, survivorship, reproductive output and the morphological characteristics of L. marina are used to evaluate the adaptation of this species to a changing environment, typical of the temperate coasts of northern Patagonia in Argentina.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Int Phycological Soc  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Abundance  
dc.subject
Macroalgae  
dc.subject
Macrothalli And Spacial Microthalli  
dc.subject
Morphology  
dc.subject
Survivorship  
dc.subject
Reproductive  
dc.title
Heteromorphic phases of Leathesia marina (Ectocarpales, Ochrophyta) over time from northern Patagonia, Argentina  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-10-12T19:35:57Z  
dc.journal.volume
56  
dc.journal.number
5  
dc.journal.pagination
579-589  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Poza, Ailen Melisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina  
dc.description.fil
Fil: Gauna, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina  
dc.description.fil
Fil: Escobar, Juan Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina  
dc.description.fil
Fil: Parodi, Elisa Rosalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina  
dc.journal.title
Phycologia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.phycologia.org/doi/10.2216/16-117.1  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2216/16-117.1