Photosynthetic response and zonation of three species of Gelidiales from Tenerife, Canary Islands

S. Domíguez-Álvarez; J. M. Rico; M. C. Gil-Rodríguez

doi:10.3989/ajbm.2280

Autores/as

S. Domíguez-Álvarez Departamento de Biología Vegetal (Botánica), Universidad de La Laguna, La Laguna
J. M. Rico Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo, Oviedo
M. C. Gil-Rodríguez Departamento de Biología Vegetal (Botánica), Universidad de La Laguna, La Laguna

DOI:

https://doi.org/10.3989/ajbm.2280

Palabras clave:

ecofisiología, fotosíntesis, Gelidiales, Gelidium, Islas Canarias, Pterocladiella

Resumen

Se han seleccionado tres especies de Gelidiales (Gelidium arbuscula, Gelidium canariense y Pterocladiella capillacea) que son abundantes en los niveles inferiores del intermareal de la costa N de Tenerife para establecer, utilizando fluorescencia tipo PAM, la importancia de la cantidad de luz y la exposición al aire en su zonación vertical. Se ha comparado la tolerancia a la emersión en frondes expuestas al aire, y los resultados sugieren que la capacidad de recuperación de la fotosíntesis tras la emersión tiene un papel fundamental en la explicación de la posición vertical de estas tres especies. Además, características morfológicas como el apelotonamiento de las frondes pueden coadyuvar a la mayor tolerancia, al reducir la pérdida de agua en emersión en las especies de niveles más altos. Las variaciones entre sitios se pueden deber a desigualdades locales en la cantidad de luz provocadas por diferencias topográficas.

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