Detalles de la publicación.

Artículo

Año:2014
Autor(es):A. Mansilla, S. Rosenfeld, J. Rendoll, S. Murcia, C. Werlinger, N.S. Yokoya, J. Terrados
Título:Tolerance response of Lessonia flavicans from the sub-Antarctic ecoregion of Magallanes under controlled environmental conditions
Revista:JOURNAL OF APPLIED PHYCOLOGY
ISSN:0921-8971
JCR Impact Factor:2.559
Volumen:26
Páginas:1971-1977
D.O.I.:10.1007/s10811-014-0294-6
Web:
Resumen:Environmental heterogeneity plays a key role in
spatio-temporal distribution of organisms, their ecology and
their evolutionary biology, with their physiological response,
or tolerance to the environment defining their distributional
range. The macroalgae of the sub-Antarctic ecoregion of
Magallanes are subject to a wide range of environments,
resulting from geomorphological processes (glacial erosion
in the Quaternary), oceanographic gradients, and drastic seasonal
variations of photoperiod and irradiance (winter <8 h of
light, summer >17 h).We examined the tolerance response of
the brown alga Lessonia flavicans to contrasting environments
(three salinities, two temperatures, and two photoperiods)
under controlled laboratory conditions. Our results suggest
that L. flavicans has limited salinity tolerance that is affected
by temperature and photoperiod. Summer temperature (9 °C±
0.02) and photoperiod (18:6 h L:D) and salinity 32 psu seem
optimal conditions for L. flavicans sporophyte development.
Results of the present study provide key information for
culturing a species of high economic and biological value,
and could aid in predicting the species potential tolerance
response to environmental fluctuations in the wake of global
changes.

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