title: Vulnerability and acclimation to increased UVB radiation in three intertidal macroalgae of different morpho-functional groups.
abstract: The vulnerability and acclimation to increased UVB radiation in three macroalgae of different morpho-functional groups collected in the Mediterranean coastal waters were evaluated. The algae were submitted for 7 days to increased (PAB+) and decreased (PAB-) UVB radiation. The thickness and morphology influenced the response to increased UVB radiation, being Cystoseira tamariscifolia the less vulnerable algae followed by Ellisolandia elongata. The highest resistance to increased UVB radiation in C. tamariscifolia was related to the accumulation of polyphenols and high antioxidant activity, whereas E. elongata was due to its high reflectance. Finally, Ulva rigida suffered the highest photoinhibition under PAB+ culture. The latest species presented 10 times lower polyphenol content and antioxidant activity than C. tamariscifolia. The three species showed different acclimation patterns to the changes of UVB radiation related to the morphology, photosynthetic activity, accumulation of photoprotectors and antioxidant activities. The ecological implications of the UVB variations on macroalgae are discussed.
authors.affiliation: Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, España.
authors.forename: Félix L
authors.initials: FL
authors.lastname: Figueroa
authors.affiliation: Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, España.
authors.forename: Belén
authors.initials: B
authors.lastname: Domínguez-González
authors.affiliation: Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, España. Electronic address: nkorbee@uma.es.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Korbee
mesh_terms: D000064:Acclimatization; D000459:Phaeophyceae / Q000502:physiology / Q000528:radiation effects*; D000461:Rhodophyta / Q000502:physiology / Q000528:radiation effects*; D013030:Spain; D013045:Species Specificity; D014466:Ultraviolet Rays / Q000009:adverse effects*; D044445:Ulva / Q000502:physiology / Q000528:radiation effects*
keywords: Algae; Antioxidant activity; Coastal zone; Cystoseira tamariscifolia; Ellisolandia elongata; Global change; In vivo chlorophyll fluorescence; UV photoprotectors; UVB radiation; Ulva rigida