Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/49572
Title: Functional responses of juvenile kelps, Laminaria ochroleuca and Saccorhiza polyschides, to increasing temperatures
Authors: Biskup, Szymon
Bertocci, Iacopo
Arenas, Francisco
Tuya, Fernando 
UNESCO Clasification: 241705 Biología marina
Keywords: Acclimatization
Productivity
Respiration
Saccorhiza polyschides
Laminaria ochroleuca, et al
Issue Date: 2014
Publisher: 0304-3770
Journal: Aquatic Botany 
Abstract: We tested the ability of juvenile sporophytes of two coexisting kelps native to Portugal, Laminaria ochroleuca and Saccorhiza polyschides, to adjust their photosynthesis and respiration to increasing sea water temperatures. These responses were measured for S. polyschides from both the subtidal and the intertidal habitat, and for L. ochroleuca from the intertidal habitat. L. ochroleuca showed a reduced ability to acclimatize to changing conditions, whereas S. polyschides demonstrated a larger physiological flexibility. These findings are connected with the life-history traits of these species. Additionally, optimum temperatures for the primary production of kelps were assessed, indicating higher values for inter- than subtidal S. polyschides. Significant physiological differences between inter- and subtidal S. polyschides were observed, based on metabolic rates of primary production and dark respiration. This study suggests that, under a warming climate scenario, responses can significantly vary for each species, and that L. ochroleuca is more susceptible to ocean warming than S. polyschides, due to larger acclimatization capacity of the latter.
URI: http://hdl.handle.net/10553/49572
ISSN: 0304-3770
DOI: 10.1016/j.aquabot.2013.10.003
Source: Aquatic Botany [ISSN 0304-3770], v. 113, p. 117-122
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