Sex and microhabitat influence the uptake and allocation of mycosporine-like amino acids to tissues in the purple sea urchin, Strongylocentrotus purpuratus

UVR-absorbing mycosporine-like amino acids (MAAs) were detected in tissues of Strongylocentrotus purpuratus and in ten species of Rhodophyte macroalgae (eight previously untested) collected from intertidal microhabitats in November and January 2006–2007 in Central California (35°09′N, 120°45′W). In...

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Bibliographic Details
Published in:Marine biology 2012-12, Vol.159 (12), p.2839-2852
Main Authors: Gravem, Sarah A., Adams, Nikki L.
Format: Article
Language:English
Subjects:
Algae
Amino acids
Animal and plant ecology
Animal reproduction
Animal, plant and microbial ecology
Biological and medical sciences
Biomedical and Life Sciences
Echinoidea
Environmental aspects
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
Life Sciences
Marine
Marine & Freshwater Sciences
Marine biology
Microbiology
Microhabitats
Oceanography
Original Paper
Physiological aspects
Sea urchins
Sea water ecosystems
Strongylocentrotus purpuratus
Synecology
Ultraviolet radiation
Wavelengths
Zoology
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Summary:UVR-absorbing mycosporine-like amino acids (MAAs) were detected in tissues of Strongylocentrotus purpuratus and in ten species of Rhodophyte macroalgae (eight previously untested) collected from intertidal microhabitats in November and January 2006–2007 in Central California (35°09′N, 120°45′W). In sea urchins, MAA concentrations were higher in ovaries than testes, while epidermal concentrations were similar between sexes. Ovaries and epidermal tissues had similar MAA signatures and broadband UVA/UVB absorbance, while testes had a narrower absorption ranges shifted toward higher energy wavelengths. Sea urchins occupying pits in the substrate exhibited lower MAA concentrations than those outside pits, suggesting adult microhabitat may impact UV protection. Light levels did not influence gonadal MAA concentrations, but correlated with elevated epidermal MAA concentrations for males in the sunniest microhabitat. This study suggests sex and habitat strongly influence MAA concentrations among individual S. purpuratus and that allocation of MAA sunscreens to tissues in response to UVR is sex-dependent.
ISSN:0025-3162
1432-1793
DOI:10.1007/s00227-012-2045-z