Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)

The diversity of epiphytes, their temporal abundance variation and the anatomical structure of host-epiphyte interfaces were studied in the agarophyte Gracilaria gracilis from a natural bed in Bahía Bustamante, Chubut Province, Argentina. Twenty-nine algal species were recorded as epiphytes during 2...

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Detalles Bibliográficos
Autores principales: Martín, L.A., de Zaixso, A.L.B., Miravalles, A.B., Rodríguez, M.C., Leonardi, P.I.
Formato: JOUR
Materias:
Density
Epiphytism
Gracilaria gracilis
Morphological modifications by epiphytes
Natural bed
Rhodophyta
Ultrastructure
algae
Bacteria (microorganisms)
Calothrix confervicola
Ceramiales
Ceramium rubrum
Gracilaria
Polysiphonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09218971_v25_n5_p1319_Martin
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09218971_v25_n5_p1319_Martin
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spelling todo:paper_09218971_v25_n5_p1319_Martin2023-10-03T15:45:43Z Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina) Martín, L.A. de Zaixso, A.L.B. Miravalles, A.B. Rodríguez, M.C. Leonardi, P.I. Density Epiphytism Gracilaria gracilis Morphological modifications by epiphytes Natural bed Rhodophyta Ultrastructure algae Bacteria (microorganisms) Calothrix confervicola Ceramiales Ceramium rubrum Gracilaria Gracilaria gracilis Polysiphonia Rhodophyta The diversity of epiphytes, their temporal abundance variation and the anatomical structure of host-epiphyte interfaces were studied in the agarophyte Gracilaria gracilis from a natural bed in Bahía Bustamante, Chubut Province, Argentina. Twenty-nine algal species were recorded as epiphytes during 2 years of monthly sampling (March 2006-February 2008). Total epiphyte density ranged between 0.037 ind. cm-2 (November 2006) and 39.37 ind. cm-2 (April 2007), with higher density values throughout the second sampling year. Ceramiales species were the most abundant epiphytes. The density of Ceramium rubrum ranged from 0.09 ind. cm-2 (52 % of the total amount) in September 2006 to 17.4 ind. cm-2 (44.18 % of the total amount) in April 2007. Epiphyte infection was more dependent on spore recruitment and sporeling development, especially on thalli derived from fragmentation, than on seasonal environmental variations. The different infections were analysed, taking into account the epiphytic attachment strength and invasiveness and the degree of damage inflicted on the host. Calothrix confervicola was one of the most abundant species. This epiphyte, weakly attached to the host surface, generated no host tissue damage. In contrast, C. rubrum, Polysiphonia abscissa and other Ceramiales were the species that caused more damage to the host because their rhizoids penetrated the cortical portion of the host thallus, sometimes reaching the medullary tissue. Some generalisations and characterisations of the different epiphyte groups in relation to their consequences to Gracilaria spp. are presented. © 2012 Springer Science+Business Media Dordrecht. Fil:Rodríguez, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09218971_v25_n5_p1319_Martin
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Density
Epiphytism
Gracilaria gracilis
Morphological modifications by epiphytes
Natural bed
Rhodophyta
Ultrastructure
algae
Bacteria (microorganisms)
Calothrix confervicola
Ceramiales
Ceramium rubrum
Gracilaria
Gracilaria gracilis
Polysiphonia
Rhodophyta
spellingShingle Density
Epiphytism
Gracilaria gracilis
Morphological modifications by epiphytes
Natural bed
Rhodophyta
Ultrastructure
algae
Bacteria (microorganisms)
Calothrix confervicola
Ceramiales
Ceramium rubrum
Gracilaria
Gracilaria gracilis
Polysiphonia
Rhodophyta
Martín, L.A.
de Zaixso, A.L.B.
Miravalles, A.B.
Rodríguez, M.C.
Leonardi, P.I.
Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
topic_facet Density
Epiphytism
Gracilaria gracilis
Morphological modifications by epiphytes
Natural bed
Rhodophyta
Ultrastructure
algae
Bacteria (microorganisms)
Calothrix confervicola
Ceramiales
Ceramium rubrum
Gracilaria
Gracilaria gracilis
Polysiphonia
Rhodophyta
description The diversity of epiphytes, their temporal abundance variation and the anatomical structure of host-epiphyte interfaces were studied in the agarophyte Gracilaria gracilis from a natural bed in Bahía Bustamante, Chubut Province, Argentina. Twenty-nine algal species were recorded as epiphytes during 2 years of monthly sampling (March 2006-February 2008). Total epiphyte density ranged between 0.037 ind. cm-2 (November 2006) and 39.37 ind. cm-2 (April 2007), with higher density values throughout the second sampling year. Ceramiales species were the most abundant epiphytes. The density of Ceramium rubrum ranged from 0.09 ind. cm-2 (52 % of the total amount) in September 2006 to 17.4 ind. cm-2 (44.18 % of the total amount) in April 2007. Epiphyte infection was more dependent on spore recruitment and sporeling development, especially on thalli derived from fragmentation, than on seasonal environmental variations. The different infections were analysed, taking into account the epiphytic attachment strength and invasiveness and the degree of damage inflicted on the host. Calothrix confervicola was one of the most abundant species. This epiphyte, weakly attached to the host surface, generated no host tissue damage. In contrast, C. rubrum, Polysiphonia abscissa and other Ceramiales were the species that caused more damage to the host because their rhizoids penetrated the cortical portion of the host thallus, sometimes reaching the medullary tissue. Some generalisations and characterisations of the different epiphyte groups in relation to their consequences to Gracilaria spp. are presented. © 2012 Springer Science+Business Media Dordrecht.
format JOUR
author Martín, L.A.
de Zaixso, A.L.B.
Miravalles, A.B.
Rodríguez, M.C.
Leonardi, P.I.
author_facet Martín, L.A.
de Zaixso, A.L.B.
Miravalles, A.B.
Rodríguez, M.C.
Leonardi, P.I.
author_sort Martín, L.A.
title Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
title_short Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
title_full Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
title_fullStr Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
title_full_unstemmed Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
title_sort epiphytism in a subtidal natural bed of gracilaria gracilis of southwestern atlantic coast (chubut, argentina)
url http://hdl.handle.net/20.500.12110/paper_09218971_v25_n5_p1319_Martin
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