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Abstract:

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.

Registro:

Documento: Artículo
Título:Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina)
Autor:Martín, L.A.; de Zaixso, A.L.B.; Miravalles, A.B.; Rodríguez, M.C.; Leonardi, P.I.
Filiación:Laboratorio de Estudios Básicos y Biotecnológicos en Algas y Hongos, Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS), CONICET, Camino de La Carrindanga, Km 7, 8000 Bahía Blanca, Argentina
Laboratorio de Ficología y Micología, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, 8000 Bahía Blanca, Argentina
CONICET-Facultad de Humanidades y Ciencias Sociales, Instituto de Desarrollo Costero, Universidad Nacional de la Patagonia San Juan Bosco, Comodoro Rivadavia, Argentina
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave: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
Año:2013
Volumen:25
Número:5
Página de inicio:1319
Página de fin:1329
DOI: http://dx.doi.org/10.1007/s10811-012-9961-7
Título revista:Journal of Applied Phycology
Título revista abreviado:J. Appl. Phycol.
ISSN:09218971
CODEN:JAPPE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09218971_v25_n5_p1319_Martin

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Citas:

---------- APA ----------
Martín, L.A., de Zaixso, A.L.B., Miravalles, A.B., Rodríguez, M.C. & Leonardi, P.I. (2013) . Epiphytism in a subtidal natural bed of Gracilaria gracilis of southwestern Atlantic coast (Chubut, Argentina). Journal of Applied Phycology, 25(5), 1319-1329.
http://dx.doi.org/10.1007/s10811-012-9961-7
---------- CHICAGO ----------
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)" . Journal of Applied Phycology 25, no. 5 (2013) : 1319-1329.
http://dx.doi.org/10.1007/s10811-012-9961-7
---------- MLA ----------
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)" . Journal of Applied Phycology, vol. 25, no. 5, 2013, pp. 1319-1329.
http://dx.doi.org/10.1007/s10811-012-9961-7
---------- VANCOUVER ----------
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). J. Appl. Phycol. 2013;25(5):1319-1329.
http://dx.doi.org/10.1007/s10811-012-9961-7