Epiphytic flora on Gelidium corneum (Rhodophyta: Gelidiales) in relation to wave exposure and depth

  1. Endika Quintano
  2. Isabel Díez
  3. Nahiara Muguerza
  4. Alberto Santolaria
  5. José María Gorostiaga
Aldizkaria:
Scientia Marina

ISSN: 0214-8358

Argitalpen urtea: 2015

Alea: 79

Zenbakia: 4

Orrialdeak: 479-486

Mota: Artikulua

DOI: 10.3989/SCIMAR.04239.08B DIALNET GOOGLE SCHOLAR lock_openSarbide irekia editor

Beste argitalpen batzuk: Scientia Marina

Laburpena

El alga formadora de copa Gelidium corneum (Hudson) J.V. Lamouroux tiene un papel fundamental en el funcionamiento de los ecosistemas submareales del mar Cantábrico (norte de España). A pesar de su importancia, se sabe poco sobre los factores que afectan a la distribución de su flora epífita. En este estudio, examinamos dos factores indirectos: la orientación de la costa (N y NO) y la profundidad (3 y 7 m), como factores representativos de la exposición al oleaje y la disponibilidad de luz, respectivamente. Este estudio testa sus efectos sobre la carga total de epífitos, la alfa-diversidad (riqueza de especies, Shannon, Simpson y equitatividad) y la estructura multivariable de la flora epífita que crece sobre G. corneum en las aguas submareales de la costa vasca. Los epífitos más comunes fueron Plocamium cartilagineum, Dictyota dichotoma y Acrosorium ciliolatum. Se observó un efecto interactivo de la orientación de la costa y la profundidad para la composición de especies y la abundancia de la flora epífita. En las localidades con mayor exposición al oleaje la carga epífita era menor y la comunidad menos diversa, sugiriendo que bajo condiciones de un elevado hidrodinamismo los epífitos eran más sus- ceptibles de ser desprendidos de su hospedador. Sin embargo, la disponibilidad de luz solo tuvo un efecto significativo en la distribución de los epífitos por debajo de ciertos umbrales de la acción del oleaje, siendo la carga de epifitos un 30-40% mayor en los fondos someros.

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